rst-331 troubleshooting atm mpls.pdf
TRANSCRIPT
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TroubleshootingATM MPLS
Session RST-331
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Table of Contents
• ATM MPLS Overview
• LSC-Switch Problems
• Bring-Up Problems
• LSR-LSR Troubleshooting
• LVC Problems and Network-Wide
Troubleshooting• Multiple Controller Problems
• Summary
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ATM MPLS Overview
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ATM MPLS
• MPLS adds IP routingcontrol to an ATM
switch
• MPLS enables ATMswitches to also actlike routers
Fully support IP, alongwith frame relay and ATM,
on shared ATM backbone
Provides optimal IPforwarding capabilityon an ATM network
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PPP Header
(Packet over SONET/SDH)
ATM Cell Header
LAN MAC Label Header
Label Header Label Header PPP Header PPP Header Layer 3 Header Layer 3 Header
HECHEC
LabelLabel
DATADATACL PCL PPTIPTIVCIVCIGFCGFC VPIVPI
Label Header Label Header MAC Header MAC Header Layer 3 Header Layer 3 Header
Encapsulations
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ATM Switch Label Switch
Controller
ATM Label
Switch Router
++ ==
ATM Label Switch Router
• The Label Switch Controller is an MPLS router
with functionality to control an ATM switch usingVSI (Virtual Switch Interface)
• Separation of routing and forwarding
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Firmware and DriversFirmware and Drivers
Virtual Switch SlavePlatform
Software
VSI
VSI Master
MPLS SoftwareMPLS Software Network-Layer
Software
ConnectionRequests
SwitchInfoUpdates
LSC
Controlled Switch
VSI
Virtual Switch Interface (VSI)
• VSI is an interface between network-layer
software and platform connection software
• VSI allows a cross-connect to be establishedat a switch
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• Control of switch cross-connects
• Switch configuration discovery
• Monitoring of port and VC statistics
• Resynchronization
Virtual Switch Interface (VSI)
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• Allows platform performance to be scaled using
distributed processing, i.e. across several cards
• Multiple paths into platform eliminates anycentral bottleneck
Master
Controller (e.g. MPLS, PNNI)Controller (e.g. MPLS, PNNI)Network Software
VSI
Platform Software
VSI VSI
Slave 1
Card 1Card 1
Slave 2
Card 2Card 2
Slave 3
Card 3Card 3
Multiple Slave Model
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IP RoutingIP Routing
LDP SignalingLDP Signaling
L2 VCsL2 VCs
PNNI Routing
UNI/NNI SignalingUNI/NNI Signaling
MPLS
Stack
ATM Forum
Stack
MPLS Is an ATM Control Stack
• The MPLS protocol stack consists of IP routing and MPLS
signaling, together setting up connectivity at Layer 2
• Label VCs (LVCs) are not PVCs or SVCs
• LVCs, SVCs and PVCs can exist on same link: different VPIs
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BXM 3BXM 3
Port
LDP/RoutingSignaling VCs
BXM 1BXM 1
ATM Link
Label Switch Controller on 7xxx Router
VSI Inter-SlaveControl x-conns
BXM 2BXM 2
VSI Master-SlaveControl VCs
Label-Controlled
VC x-connsConfig Control
BPX Switch
Switch, LSC, and VSI: More Details
VSI Master
LSC and Routing SoftwareLSC and Routing Software
BXM 1BXM 1BXM 1VSI Slave 1
VSI Slave 2 VSI Slave 3
BCCBCC
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LSC-Switch Problems
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LSC
Controlled Switch
VSI
• Symptom: No VSIsessions established
State shows UNKNOWN
• Scenario
wsw-7206 -3a#show controllers vsi session
Interface Session VCD VPI/VCI Switch/Slave Ids Session State ATM1/0 0 1 0/40 0/0 UNKNOWN
ATM1/0 1 2 0/41 0/0 UNKNOWN
ATM1/0 2 3 0/42 0/0 UNKNOWN
ATM1/0 3 4 0/43 0/0 UNKNOWN
ATM1/0 4 5 0/44 0/0 UNKNOWN
ATM1/0 5 6 0/45 0/0 UNKNOWN ATM1/0 6 7 0/46 0/0 UNKNOWN
ATM1/0 7 8 0/47 0/0 UNKNOWN
ATM1/0 8 9 0/48 0/0 UNKNOWN
ATM1/0 9 10 0/49 0/0 UNKNOWN
ATM1/0 10 11 0/50 0/0 UNKNOWN ATM1/0 11 12 0/51 0/0 UNKNOWN ATM1/0 12 13 0/52 0/0 UNKNOWN
ATM1/0 13 14 0/53 0/0 UNKNOWN
wsw-7206 -3a#
No Communicationbetween LSC and Controlled Switch
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wsw-7206-3a#show controllers vsi session 0Interface: ATM1/0 Session number: 0 VCD: 1 VPI/VCI: 0/40Switch type: Switch id: 0Controller id: 1 Slave id: 0…
Possible Cause 1
• Different base-vc for VSI master-slave channels
• The base-vc in the controller in this case is 0/40(corresponding to slave 0)
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 10 2001 23:49 EST
BPX 8620 VSI controller information
Ctrl Id Part Id Control_VC Trunk Ctrlr Type Intfc VPI VCIRange
3 1 0 100-114 3.1 VSI VSI
Last Command: dspctrlrs
Next Command:
Possible Cause 1
• In BPX/IGX can be seen with dspctrlrs
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wsw-7206-3a(config-if)#tag-control-protocol vsi ? base-vc VC to use for VSI protocolid Specify the controller id keepalive Timeout for VSI keepalive protocolretry VSI request timer and retry countslaves VSI slave count <cr> wsw-7206-3a(config-if)#
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 10 2001 02:33 EST
BPX 8620 Interface Shelf Information
Trunk Name Type Part Id Ctrl Id Control_VC Alarm
VPI VCIRange3.1 VSI VSI 1 3 0 40-54 OK
Last Command: addshelf 3.1 v 3 1 0 40
Shelf has been added Next Command:
Solution Problem 1• Modify the base-vc either in the master or the slave
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Possible Cause 2
• Base-VCs are the same but still no luck…
• Different controller ID in master and slaves
wsw-7206-3a#show controllers vsi session 0Interface: ATM1/0 Session number: 0 VCD: 1 VPI/VCI: 0/40Switch type: Switch id: 0Controller id: 1 Slave id: 0…
wsw-7206-3a#debug vsi errors02:18:37: VSI Master: parse error (unexpected controller id) in IFC GET CNFGTRAP rcvd on ATM1/0:0/42 (slave 2)02:19:29: VSI Master: got NAK reason 105 (unknown ctrler id) in GEN ERROR RSP
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 10 2001 23:49 EST
BPX 8620 VSI controller information
Ctrl Id Part Id Control_VC Trunk Ctrlr Type Intfc VPI VCIRange
3 1 0 40-54 3.1 VSI VSI
Last Command: dspctrlrs
Next Command:
Possible Cause 2
• In BPX/IGX can be seen with dspctrlrs
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Solution Problem 2
• Modify the controller ID in either master or slave wsw-7206-3a(config-if)#tag-control-protocol vsi ? base-vc VC to use for VSI protocolid Specify the controller id keepalive Timeout for VSI keepalive protocolretry VSI request timer and retry countslaves VSI slave count <cr> wsw-7206-3a(config-if)#
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 10 2001 02:33 EST
BPX 8620 Interface Shelf Information
Trunk Name Type Part Id Ctrl Id Control_VC Alarm VPI VCIRange
3.1 VSI VSI 1 1 0 40-54 OK
Last Command: addshelf 3.1 v 1 1 0 40
Shelf has been added Next Command:
Default base-vc = 0/40Default id = 1
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wsw-7206-3a#show controllers vsi sessionInterface Session VCD VPI/VCI Switch/Slave Ids Session State ATM1/0 0 1 0/40 0/0 UNKNOWN ATM1/0 1 2 0/41 0/0 UNKNOWN ATM1/0 2 3 0/42 0/3 ESTABLISHED ATM1/0 3 4 0/43 0/0 UNKNOWN
• Check for KA
wsw-7206-3a#debug vsi packets interface atm 1/0 slave 2 VSI Master packet debugging is onDisplaying packets on interface ATM1/0, selected slave(s) only wsw-7206-3a#00:35:12: VSI Master (session 2 on ATM1/0): sent msg SW GET CNFG CMD on 0/4200:35:12: VSI Master (session 2 on ATM1/0): rcvd msg SW GET CNFG RSP on 0/4200:35:27: VSI Master (session 2 on ATM1/0): sent msg SW GET CNFG CMD on 0/4200:35:27: VSI Master (session 2 on ATM1/0): rcvd msg SW GET CNFG RSP on 0/42
Verification• Check that sessions are established
• Slave ID is BXM/UXM slot number
• Established on active cards
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wsw-7206-3a#show controllers vsi session 2Interface: ATM1/0 Session number: 2 VCD: 3 VPI/VCI: 0/42Switch type: BPX Switch id: 0Controller id: 1 Slave id: 3Keepalive timer: 15 Powerup session id: 0x00000001Cfg/act retry timer: 8/8 Active session id: 0x00000001 Max retries: 10 Ctrl port log intf: 0x00030100Trap window: 50 Max/actual cmd wndw: 21/21Trap filter: all Max checksums: 79Current VSI version: 2 Min/max VSI version: 2/2 Messages sent: 17 Inter-slave timer: 0.004
Messages received: 14 Messages outstanding: 0 wsw-7206-3a#
Verification
• Check session details
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wsw-7206-5a#show controllers vsi traffic session 10Sent Received
Sw Get Cnfg Cmd: 870 Sw Get Cnfg Rsp: 870Sw Cnfg Trap Rsp: 0 Sw Cnfg Trap: 0Sw Set Cnfg Cmd: 1 Sw Set Cnfg Rsp: 1Sw Start Resync Cmd: 1 Sw Start Resync Rsp: 1Sw End Resync Cmd: 1 Sw End Resync Rsp: 1Ifc Getmore Cnfg Cmd: 2 Ifc Getmore Cnfg Rsp: 2Ifc Cnfg Trap Rsp: 0 Ifc Cnfg Trap: 0Ifc Get Stats Cmd: 3 Ifc Get Stats Rsp: 3Conn Cmt Cmd: 14 Conn Cmt Rsp: 14Conn Del Cmd: 3 Conn Del Rsp: 3Conn Get Stats Cmd: 0 Conn Get Stats Rsp: 0
Conn Cnfg Trap Rsp: 0 Conn Cnfg Trap: 0Conn Bulk Clr Stats Cmd: 0 Conn Bulk Clr Stats Rsp: 0Gen Err Rsp: 0 Gen Err Rsp: 0unused: 0 unused: 0unknown: 3 unknown: 3TOTAL: 898 TOTAL: 115
wsw-7206-5a#
Verification
• Check VSI messages
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Addshelf/Addcontroller
• ‘addshelf VSI’ triggers the creation ofmaster-slave and inter-slave cross-connects
• In an IGX, the command is ‘addctrlr’
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 10 2001 02:59 EST
VSI lcns for Slot 3
lcn type dest_slot dest_lcn vpi vci16364 control-port msvc local - 0 4216372 control-port msvc 11 16364 0 5016357 interslave 11 16349 - -
Last Command: dspvsich 3
Next Command:
• VSI slaves in slots 3 and 11
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wsw-7206-2a#conf tEnter configuration commands, one per line. End with CNTL/Z.
wsw-7206-2a(config)#int at 2/0 wsw-7206-2a(config-if)#tag-control-protocol vsi id 3 slaves 31
IGX-8420 and IGX-8430
• By default, 14 master-slave VCs are createdin the controller
• Use slaves parameter to increase the number
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VSI Terminating VCs
BXM
Slot 1
BXM
Slot 2BXM
Slot 14
VPI/VCI0/40
VPI/VCI0/41
VPI/VCI0/53
Controller IDController ID
Controller IDController ID
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Bring-Up Problems
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LSC
Controlled Switch
VSI wsw-7206-3a#show controllers vsi control-interfaceInterface: ATM1/0 Connections: 0 wsw-7206-3a#
wsw-7206-3a#show tag-switching interfacesInterface IP Tunnel OperationalXTagATM1101 Yes No No (ATM tagging) wsw-7206-3a#
Problem 1: No VCs Created
• Scenario • Symptom: Absence of PVCs and LVCs otherthan the VSI VCs
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Problem Symptom
• Symptom: The LSC cannot create VCsusing VSI
wsw-7206 -3a#show atm vc interface atm 1/0
VCD / Pea k Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts
1/0 1 0 40 PVC SNAP UBR 40704 UP1/0 2 0 41 PVC SNAP UBR 40704 UP
1/0 3 0 42 PVC SNAP UBR 40704 UP
1/0 4 0 43 PVC SNAP UBR 40704 UP
1/0 5 0 44 PVC SNAP UBR 40704 UP
1/0 6 0 45 PVC SNAP UBR 40704 UP
1/0 7 0 46 PVC SNAP UBR 40704 UP1/0 8 0 47 PVC SNAP UBR 40704 UP
1/0 9 0 48 PVC SNAP UBR 40704 UP1/0 10 0 49 PVC SNAP UBR 40704 UP
1/0 11 0 50 PVC SNAP UBR 40704 UP
1/0 12 0 51 PVC SNAP UBR 40704 UP
1/0 13 0 52 PVC SNAP UBR 40704 UP1/0 14 0 53 PVC SNAP UBR 40704 UP
wsw-7206 -3a#
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wsw-7206-3a#show controllers vsi statusInterface Name IF Status IFC State Physical DescriptorXTagATM1101 down ACTIVE 0.11.1.0 wsw-7206-3a#
Possible Cause
• There’s no VSI partition in the control interface
• This does not prevent the controller from being added
• Use show controllers vsi status and check if there’san interface with the name “switch control port”
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wsw-7206-3a#show controllers vsi descriptor
Phys desc: 0.11.1.0Log intf: 0x000B0100 (0.11.1.0)
Interface: XTagATM1101IF status: down IFC state: ACTIVE Min VPI: 2 Maximum cell rate: 100000 Max VPI: 15 Available channels: 7633 Min VCI: 32 Available cell rate (forward): 100000 Max VCI: 65535 Available cell rate (backward): 100000
wsw-7206-3a#
Possible Cause
• Session is active but there’s no descriptor for thecontrol interface
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 11 2001 03:32 EST
Trunk : 3.1Full Port Bandwidth: 96000
Maximum PVC LCNS: 0 Maximum PVC Bandwidth: 91000(Statistical Reserve: 5000)
PVC VPI RANGE [1]: -1 /-1 PVC VPI RANGE [2]: -1 /-1PVC VPI RANGE [3]: -1 /-1 PVC VPI RANGE [4]: -1 /-1
Partition : 1 2 3Partition State : Disabled Disabled Disabled
VSI LCNS (min/max): 1000 /2000 0 /0 0 /0 VSI VPI (start/end): 1 /4095 0 /0 0 /0
VSI BW (min/max): 91000 /91000 0 /0 0 /0 VSI ILMI Config: CLR CLR CLR
Last Command: dsprsrc 3.1
Next Command:
Possible Cause
• Use dsprsrc in the BPX/IGX using thecontrol interface
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 11 2001 03:31 EST
Trunk : 3.1Full Port Bandwidth: 96000
Maximum PVC LCNS: 0 Maximum PVC Bandwidth: 0(Statistical Reserve: 5000)
PVC VPI RANGE [1]: -1 /-1 PVC VPI RANGE [2]: -1 /-1PVC VPI RANGE [3]: -1 /-1 PVC VPI RANGE [4]: -1 /-1
Partition : 1 2 3Partition State : Enabled Disabled Disabled
VSI LCNS (min/max): 1000 /2000 0 /0 0 /0 VSI VPI (start/end): 1 /4095 0 /0 0 /0
VSI BW (min/max): 91000 /91000 0 /0 0 /0 VSI ILMI Config: CLR CLR CLR
Last Command: cnfrsrc 3.1 0 0 N y 1 E 1000 2000 1 4095 91000 91000
Next Command:
Solution
• Use cnfrsrc in the BPX/IGX
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Verification
• The LSC should look like this
wsw-7206-3a#show controllers vsi statusInterface Name IF Status IFC State Physical Descriptorswitch control port n/a ACTIVE 0.3.1.0XTagATM1101 up ACTIVE 0.11.1.0
wsw-7206-3a#show controllers vsi control-interfaceInterface: ATM1/0 Connections: 3
wsw-7206-3a#
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Last Command: cnfrsrc 11.3 256 50000 N y 1 d
Increase MAX VSI LCNs on another active partn in same port grp to 6500 Next Command:
• LCN: Logical Connection Number
• Port Group: Set of interfaces that shareLCN resources
Problem 2:
Cannot Disable Resource Partition
• Error message when trying to disable aresource partition
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• Cannot ‘shrink’ resources
• This is one of the most common problems
Formulas for Resource Reservation
• Total number of channels reserved for VSI in aport group:
? ?)max(,)(max MaxLCN MinLCN ed_LCN VSI_reserv PortGroup_ ??
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 21 2001 23:31 EST
Detailed Card Display for BXM-155 in slot 11Status: ActiveRevision: FDL Backcard InstalledSerial Number: 687272 Type: LM-BXM Top Asm Number: 28215802 Revision: BBQueue Size: 228300 Serial Number: 706939Support: 8 Pts, OC3, FST, VcShp Supp: 8 Pts,OC3,MMF,RedSlot:NOSupp: VT,ChStLv 1,VSI(Lv 3,ITSM)Support: APS(FW)Support: LMIv 1,ILMIv 1,NbrDiscSupport: OAMLp, TrfcGen#Ch:16320,PG[1]:8160,PG[2]:8160PG[1]:1,2,3,4,PG[2]:5,6,7,8,#Sched_Ch:16384
Last Command: dspcd 11
Next Command:
Checking for PG Info• To check for PG information we use ‘dspcd’
Port Group 1: Intfs 1, 2, 3 and 4Port Group 2: Intfs 5, 6, 7 and 8
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 21 2001 23:56 EST
Channel Management Summary for Slot 11
max used avail netw pvc cnfg vsi mgmt vsi cnf
card 11: 16320 8067 8253 542 1024 1 6500
port grp 1: 8160 8066 94 542 1024 0 6500
port grp 2: 8160 0 8160 0 0 0 0
pvc cnfg pvc used nw used vsi mgmt vsi min vsi max phy if 1: 256 0 271 0
phy trk : 256 0
part 1: 1000 4000
part 2: 1000 4000
phy if 2: 256 0 271 0
phy trk : 256 0 part 1: 1000 4000
part 2: 1000 4000
phy if 3: 256 0 0 0
phy port: 256 0 0
part 1: 1000 6500
phy if 4: 256 0 0 0 phy port: 256 0 0
part 1: 500 1000
phy if 5: 0 0 0 0
This Command: dspchuse 11
Checking for Channel Use: ‘dspchuse’
• Sum(Mins) = 5500 Max(Maxs)=6500
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 21 2001 23:58 EST
Port : 11.4Full Port Bandwidth: 353208
Maximum PVC LCNS: 256 Maximum PVC Bandwidth: 100000(CAC Reserve: 0)
PVC VPI RANGE [1]: -1 /-1 PVC VPI RANGE [2]: -1 /-1PVC VPI RANGE [3]: -1 /-1 PVC VPI RANGE [4]: -1 /-1
Partition : 1 2 3Partition State : Enabled Disabled Disabled
VSI LCNS (min/ max): 500 /6500 0 /0 0 /0
VSI VPI (start/end): 10 /20 0 /0 0 /0 VSI BW (min/max): 100000 /100000 0 /0 0 /0 VSI ILMI Config: CLR CLR CLR
Last Command: cnfrsrc 11.4 256 100000 N y 1 E 500 6500 10 20 100000 100000
Next Command:
Solution• The solution is to increase max LCN in another
partition in the same PG
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LSR-LSR Troubleshooting
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mpls label-protocol [tdp | ldp | both]
Tag-Switching or MPLS?
• From 12.1(3)T there are ‘mpls’ commands correspondingto most ‘tag-switching’ commands
(Example ‘mpls ip’ for ‘tag-switching ip’)
• In a ‘show running-config’ show as ‘tag-switching’ forbackward compatibility
• We are still configuring TDP
• LDP support from 12.2T
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wsw-7206-3a#sh tag-switching tdp neighbor
wsw-7206-3a#
LSR LSR
Cannot Establish TDP Session
• Scenario • Symptom: TDP sessiondoesn’t come up
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wsw-7206-3a#sh tag tdp discovery
Local TDP Identifier:
10.10.10.3:0TDP Discovery Sources:Interfaces:
XTagATM1101: xmitXTagATM1102: xmit/recv
TDP Id: 10.10.10.5:2
wsw-7206-3a#
wsw-7206-5a#sh tag-switching int xtagATM 1101 detailInterface XTagATM1101:
IP tagging enabled TSP Tunnel tagging not enabled Tag Frame Relay Transport tagging not enabled Tagging not operationalIP to Tag Fast Switching VectorTag Switching Turbo Vector
MTU = 4470 ATM tagging:
Tag VPI range = 10 - 30Tag VCI range = 33 - 65535Control VC = 15/32
wsw-7206-3a#sh tag-switching int xtagATM 1101 detailInterface XTagATM1101:
IP tagging enabled TSP Tunnel tagging not enabled
Tag Frame Relay Transport tagging not enabled Tagging not operationalIP to Tag Fast Switching VectorTag Switching Turbo Vector
MTU = 4470 ATM tagging:
Tag VPI range = 2 - 15Tag VCI range = 33 - 65535Control VC = 0/32
Possible Cause 1
• Different control-vcat both ends
• TDP discovery showstransmit only
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wsw-7206-5a#show controllers xtagATM 1101Interface XTagATM1101 is up
Hardware is Tag-Controlled ATM Port (on BPX switch BPX-VSI2)Control interface ATM5/0 is upPhysical descriptor is 0.11.1.0Logical interface 0x000B0100 (0.11.1.0)Oper state ACTIVE, admin state UP
VPI range 10-30, VCI range 32-65535 VPI is not translated at end of linkTag control VC need not be strictly in VPI/VCI range
Available channels: ingress 2999, egress 2999 Maximum cell rate: ingress 100000, egress 100000 Available cell rate: ingress 100000, egress 100000Endpoints in use: ingress 0, egress 0, ingress/egress 1Rx cells 268
rx cells discarded 0, rx header errors 0rx invalid addresses: 754last invalid address 0/32
Tx cells 1008tx cells discarded: 0
wsw-7206-5a#
wsw-7206-3a#show controllers xtagATM 1101Interface XTagATM1101 is up
Hardware is Tag-Controlled ATM Port (on BPX switch BPX-VSI2)…
last invalid address 15/32
3a 5a
0;32
15;32
Possible Cause 1
• Check for unknownVPI/VCIsin LSC
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• Check for unknownVPI/VCIsin switch
Possible Cause 1
3a 5a
0;32
15;32
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 22 2001 02:32 EST
Trunk Statistics for 11.1 Cleared: Apr. 10 2001 02:56 SnapshotTrunk Speed: 353208 cps Collection Time: 11 day(s) 23:32:14 Corrupted: NO
Cells CLP (EFCI)Rx Trunk: 886066 0 --Tx Trunk: 630272 0 --
Unkn Addr (UA): 2274 Rx OAM Cells : 0 Rx Clp 0 Cells: 886066Rx Clp 0 Dscd : 0 Rx Clp 1 Dscd : 0 Tx Clp 0 Cells: 630272Tx OAM Cells : 0 Rx RM Count : 0 Tx RM Count : 0Lst Unk VpiVci: 15.32 Percent load TX 0.0% Percent load RX 0.0%
UA sums across ports in port group.
Last Command: dsptrkstats 11.1
Next Command:
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wsw-7206-3a#conf tEnter configuration commands, one per line. End with CNTL/Z.
wsw-7206-3a(config)#interface xtag 1101 wsw-7206-3a(config-if)#tag-switching atm control-vc 15 32 wsw-7206-3a(config-if)#^Z wsw-7206-3a#00:54:12: %SYS-5-CONFIG_I: Configured from console by console00:54:18: %OSPF-5-ADJCHG: Process 100, Nbr 10.10.10.2 on XTagATM1101 from LOADING toFULL, Loading Done
Solution Problem 1
• Configure the same control-vc in both ends…
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wsw-7206-3a#show tag tdp discoveryLocal TDP Identifier:
10.10.10.3:0TDP Discovery Sources:
Interfaces:XTagATM1101: xmit/recv
TDP Id: 10.10.10.2:1XTagATM1102: xmit/recv
TDP Id: 10.10.10.5:2 wsw-7206-3a#
wsw-7206-3a#show tag tdp neighborPeer TDP Ident: 10.10.10.5:2; Local TDP Ident 10.10.10.3:2
TCP connection: 10.10.10.5.11138 - 10.10.10.3.711State: Oper; PIEs sent/rcvd: 70/70; ; Downstream on demand Up time: 00:53:57TDP discovery sources:XTagATM1102
Peer TDP Ident: 10.10.10.2:1; Local TDP Ident 10.10.10.3:1TCP connection: 10.10.10.2.711 - 10.10.10.3.11001
State: Oper; PIEs sent/rcvd: 5/5; ; Downstream on demand Up time: 00:00:48TDP discovery sources:XTagATM1101
wsw-7206-3a#
Solution Problem 1• …and verify TDP functionality
• TDP identifier (router ID: label space)
• Active and passive TDP peer
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wsw-7206-3a#show tag-switching interface xTagATM 1131 detailInterface XTagATM1131:
IP tagging enabled TSP Tunnel tagging not enabled Tag Frame Relay Transport tagging not enabled
Tagging not operationalIP to Tag Fast Switching VectorTag Switching Turbo Vector MTU = 4470 ATM tagging:
Tag VPI = 3 (VP Tunnel)
Tag VCI range = 33 - 65535Control VC = 3/32
wsw-7206-3a#show controllers xtagATM 1131Interface XTagATM1131 is up
Hardware is Tag-Controlled ATM Port (on BPX switch BPX-VSI2)Control interface ATM1/0 is up
Physical descriptor is 0.11.3.1Logical interface 0x000B0301 (0.11.3.1)Oper state ACTIVE, admin state UP VPI range 3-3, VCI range 32-65535 VPI may be translated at end of linkTag control VC must be strictly in VPI/VCI range
Available channels: ingress 99, egress 99 Maximum cell rate: ingress 0, egress 0 Available cell rate: ingress 0, egress 0
Endpoints in use: ingress 0, egress 0, ingress/egress 1Rx cells 0rx cells discarded 0, rx header errors 19
rx invalid addresses: 5last invalid address 0/0
Tx cells 376tx cells discarded: 0
wsw-7206-3a#
mgx8250c_rpm_10(config-subif)#tag-sw atm vp-tunnel 10
Note
• For virtual trunks, thecontrol-vc uses the VT’sVPI; (interface is VP tunnel)
• Label is only VCI field
• In eLSR we need to specifythe VP tunnel
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wsw-7206-5a#debug tag-switching atm-tdp api
00:35:31: TAGATM_API: Disjoint VPI local[20-30], peer[2-15]
00:37:28: %TDP-3-TAGATM_BAD_RANGE: Interface XTagATM1101, Bad VPIrange. Can't start a TDP session
Possible Cause 2
• There is no common VPI range between LSRs
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wsw-7206 -5a#show controllers vsi descriptor 0.11.1.0
Phys desc: 0.11.1.0
Log intf: 0x000B0100 (0.11.1.0)
Interface: XTagATM1101
IF status: up IFC state: ACTIVE Min VPI: 20 Maximum cell rate: 100000
Max VPI: 30 Available channels: 2996
Min VCI: 32 Available cell rate (forward):
100000
Max VCI: 65535 Available cell rate (backward):
100000
wsw-7206 -5a#
wsw-7206 -3a#show controllers vsi descriptor 0.11.1.0
Phys desc: 0.11.1.0
Log intf: 0x000B0100 (0.11.1.0)Interface: XTagATM1101
IF status: up IFC state: ACTIVE Min VPI: 2 Maximum cell rate: 100000
Max VPI: 15 Available channels: 3496
Min VCI: 32 Available cell rate (forward):
50000 Max VCI: 65535 Available cell rate (backward):
50000
wsw-7206 -3a#
Possible Cause 2
• There is no common VPI range between LSRs
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b8620-5a TN Cisco BPX 8620 9.3.11 Apr. 11 2001 02:04 EST
Trunk : 11.1Full Port Bandwidth: 353208
Maximum PVC LCNS: 256 Maximum PVC Bandwidth: 248207(Statistical Reserve: 5000)
PVC VPI RANGE [1]: -1 /-1 PVC VPI RANGE [2]: -1 /-1PVC VPI RANGE [3]: -1 /-1 PVC VPI RANGE [4]: -1 /-1
Partition : 1 2 3Partition State : Enabled Disabled Disabled
VSI LCNS (min/max): 1000 /7633 0 /0 0 /0 VSI VPI (start/end): 10 /30 0 /0 0 /0
VSI BW (min/max): 50000 /100000 0 /0 0 /0 VSI ILMI Config: CLR CLR CLR
Last Command: cnfrsrc 11.1 256 248207 y 1 E 1000 7633 10 30 50000 100000
Next Command:
Note: This is because LDP currently negotiates label ranges (VPI,VCI ranges) only when the sessionis established; Shut/no shut the XmplsATMinterface will force the TDP session to be reestablished
Solution Problem 2• Configure an overlapping VPI Range with cnfrsrc
and shut/no shut the XmplsATM interface
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wsw-7206-5a#sh tag atm-tdp capability
VPI VCI Alloc Odd/Even VC MergeXTagATM1101 Range Range Scheme Scheme IN OUT Negotiated [10 - 15] [33 - 65535] BIDIR - -Local [10 - 30] [33 - 65535] BIDIR EVEN NO NOPeer [2 - 15] [33 - 65535] BIDIR ODD - -
wsw-7206-5a#
Solution Problem 2
• Verify negotiated VPI range
EVEN for lower LDP ID
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wsw-7206-5a#show tag-switching tdp discoveryLocal TDP Identifier:
10.10.10.2:0TDP Discovery Sources:
Interfaces:XTagATM1101: xmit
wsw-7206-5a#show tag-switching tdp neighbor
wsw-7206-3a#show tag-switching tdp discoveryLocal TDP Identifier:
10.10.10.3:0TDP Discovery Sources:
Interfaces:XTagATM1101: xmit/recv
TDP Id: 10.10.10.2:1; no route
wsw-7206-3a#
wsw-7206-3a#debug tag-switching tdp transport eventsTDP transport events debugging is on
00:18:44: tdp: Send hello; XTagATM1101, src/dst 10.10.10.3/255.255.255.255, inst_id 1, tcatm 00:18:46: tdp: Rcvd hello; XTagATM1101, from 10.10.10.2 (10.10.10.2:1), intf_id 1, opt 0x0, tcatm 00:18:46: tdp: Hello from 10.10.10.2 (10.10.10.2:1) to 255.255.255.255, opt 0x000:18:46: tdp: Opening conn; adj 0x631F2754, 10.10.10.3 <-> 10.10.10.200:18:46: tdp: No route to peer 10.10.10.2; set LDP_PROC_HANDLE_ROUTEUP
Only on Active TDP Side(Higher TDP ID)
Possible Cause 3• There is no route
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Solution Problem 3
• Follow usual IGP troubleshooting
• Make sure CEF is enabled in theremote LSC
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wsw-7206-3a#sh xtag cross-connect int xTagATM 1101 0 32Phys desc: 0.11.1.0Interface: XTagATM1101Intf type: extended tag ATM VPI/VCI: 0/32X-Phys desc: 0.3.1.0X-Interface: n/aX-Intf type: switch control portX-VPI/VCI: 1/32Conn-state: UPConn-type: input/outputCast-type: point-to-pointRx service type: Tag COS 7Rx cell rate: n/aRx peak cell rate: 91000
Tx service type: Tag COS 7Tx cell rate: n/aTx peak cell rate: 91000 wsw-7206-3a#
ATM Queues
MPLS Queues
ATMFPartition
MPLS Partition• Bandwidth
allocated by class
• Separate labelsper class
CBR
ABR
IP Class 1
IP Class 2
IP Class 3
UBR
Possible Cause 4
• QBINS not configured
• Use dspqbinstats in the BPX/IGX
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Possible Cause 4
• First we check the SCT the partition uses
SCT = Service Class Template
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 12 2001 00:06 EST
Trunk: 11.1
Service Class Template ID: 1
VSI Partitions :channels bw vpi
Part E/D min max min max start end ilmi1 E 1000 7633 50000 100000 2 15 D2 D 0 0 0 0 0 0 D3 D 0 0 0 0 0 0 D
Last Command: dspvsiif 11.1
Next Command:
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 12 2001 00:07 EST
Service Class Map for MPLS1 Template
Service Class Qbin Service Class Qbin Service Class Qbin
Default 13Signaling 10Tag0 10Tag1 11Tag2 12Tag3 13Tag4 10Tag5 11
Tag6 12Tag7 13TagAbr 14
Last Command: dspsct 1
Next Command:
Possible Cause 4
• Second we identify the QBin for that COSthe control-vc uses
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 12 2001 00:08 EST
Qbin Database 11.1 on BXM qbin 13 (Configured by User)(EPD Enabled on this qbin)
Qbin State: Enabled Discard Threshold: 0 cellsEPD Threshold: 0%High CLP Threshold: 0%EFCI Threshold: 0%
Last Command: dspqbin 11.1 13
Next Command:
Possible Cause 4
• Last we check the QBin configuration
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This Command: cnfqbin 11.1 13 E
Use default values from template?: y
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 12 2001 00:10 EST
Qbin Database 11.1 on BXM qbin 13 (Configured by MPLS1 Template)(EPD Enabled on this qbin)
Qbin State: Enabled Discard Threshold: 105920 cellsEPD Threshold: 95%High CLP Threshold: 100%EFCI Threshold: 100%
Last Command: cnfqbin 11.1 13 E y
Next Command:
Solution Problem 4
• Configure the QBin for default SCT values
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Verification
wsw-7206-5a#show tag-switching tdp neighborPeer TDP Ident: 10.10.10.3:1; Local TDP Ident 10.10.10.2:1
TCP connection: 10.10.10.3.12241 - 10.10.10.2.711State: Oper; PIEs sent/rcvd: 4/4; ; Downstream on demand Up time: 00:00:11TDP discovery sources:XTagATM1101
wsw-7206-5a#
62RST-3312901_05_2001_c1 © 2001, Cisco Systems, Inc. All rights reserved. © 2001, Cisco Systems, Inc. All rights reserved. © 2001, Cisco Systems, Inc. All rights reserved. 62
LVC and Network-Wide TS
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VSI Slaves
End-to-End Connections
• Network layer handles end-to-end signaling
• Network layer uses VSI at each switch to set upcross-connects and VCs
VSI
VSI Master
MPLS, IP RoutingMPLS, IP Routing
PlatformPlatform
VSI
VSI Master
MPLS, IP RoutingMPLS, IP Routing
VSI Slaves
PlatformPlatform
VSI
VSI Master
MPLS, IP RoutingMPLS, IP Routing
VSI Slaves
PlatformPlatform
LDP LDP
VC VC
Cross-
Connect
Cross-
Connect
Cross-
Connect
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wsw-7206-3a#show xtagatm vc AAL / Control Interface
Interface VCD VPI VCI Type Encapsulation VCD VPI VCI StatusXTagATM101 7 0 32 PVC AAL5-SNAP 48 1 36 ACTIVEXTagATM101 8 1 38 TVC AAL5-MUX 59 1 47 ACTIVEXTagATM101 10 1 49 TVC AAL5-MUX 71 1 59 ACTIVEXTagATM1101 11 0 32 PVC AAL5-SNAP 45 1 33 ACTIVEXTagATM1101 12 10 33 TVC AAL5-MUX 55 1 43 ACTIVEXTagATM1101 23 10 57 TVC AAL5-MUX 68 1 56 ACTIVEXTagATM1101 26 10 160 TVC AAL5-MUX 72 1 60 ACTIVEXTagATM1101 27 10 162 TVC AAL5-MUX 73 1 61 ACTIVEXTagATM1102 10 0 32 PVC AAL5-SNAP 46 1 34 ACTIVEXTagATM1102 11 244 34 TVC AAL5-MUX 49 1 37 ACTIVEXTagATM1102 17 244 45 TVC AAL5-MUX 74 1 62 ACTIVEXTagATM1131 3 3 32 PVC AAL5-SNAP 47 1 35 ACTIVEXTagATM1132 3 5 32 PVC AAL5-SNAP 44 1 32 ACTIVE
wsw-7206-3a#show xtagatm cross-connect descriptor 0.11.1.0Phys Desc VPI/VCI Type X-Phys Desc X-VPI/VCI State0.11.1.0 10/59 -> 0.1.1.0 1/47 UP0.11.1.0 10/57 -> 0.3.1.0 1/56 UP0.11.1.0 10/41 -> 0.1.1.0 1/37 UP
0.11.1.0 10/33 -> 0.3.1.0 1/43 UP0.11.1.0 10/162 <- 0.3.1.0 1/61 UP0.11.1.0 10/160 <- 0.3.1.0 1/60 UP0.11.1.0 10/156 <- 0.11.2.0 244/60 UP0.11.1.0 10/152 <- 0.1.1.0 1/46 UP0.11.1.0 10/148 <- 0.11.2.0 244/56 UP0.11.1.0 10/44 <- 0.1.1.0 1/36 UP0.11.1.0 10/40 <- 0.11.2.0 244/46 UP0.11.1.0 0/32 <-> 0.3.1.0 1/33 UP wsw-7206-3a#
VCs and Cross-Connects
• Note type andencapsulation
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Label Distribution Mechanics:Downstream on Demand
• Distributes per-interface label space(e.g. label controlled ATM)
• Upstream LSR requests label for specificdestination from downstream LSR
• Builds label VC from head-end platform totail-end platform
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Head
End
Tail
EndLabel VC
. . . D
Request (D) Request (D) Request (D)
S1 S2
S1 S2
Mapping(D, label )
S1
R2R2
R2R2
R1R1
R1R1
Mapping(D, label )
S2Mapping(D, label )
R2
Transit Transit
Label Distribution Mechanics
Downstream on Demand Example
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wsw-7204-4a#show tag-switching atm-tdp bindingsDestination: 10.10.10.2/32
Headend Router ATM3/0.1 (1 hop) 1/33 Active, VCD=109Destination: 10.10.10.3/32
Headend Router ATM3/0.1 (2 hops) 1/35 Active, VCD=110Destination: 10.10.10.4/32
Headend Router ATM3/0.1 (3 hops) 1/37 Active, VCD=111Destination: 10.10.10.5/32
Headend Router ATM3/0.1 (2 hops) 1/39 Active, VCD=112Destination: 10.10.10.1/32
Tailend Router ATM3/0.1 1/34 Active, VCD=106Tailend Router ATM3/0.1 1/36 Active, VCD=107Tailend Router ATM3/0.1 1/38 Active, VCD=108
Tailend Router ATM3/0.1 1/40 Active, VCD=113
wsw-7204-4a#
How to Check Bindings—eLSR
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wsw-7206-5a#show tag-switching atm-tdp bindingsDestination: 10.10.10.2/32
Tailend Switch XTagATM1101 10/36 Active -> Terminating Active, VCD=2Tailend Switch XTagATM1101 10/38 Active -> Terminating Active, VCD=4Tailend Switch XTagATM1103 1/33 Active -> Terminating Active, VCD=3Tailend Switch XTagATM1101 10/44 Active -> Terminating Active, VCD=6
Destination: 10.10.10.3/32Headend Switch XTagATM1101 (1 hop) 10/33 Active, VCD=3Transit XTagATM1103 1/35 Active -> XTagATM1101 10/37 Active
Destination: 10.10.10.4/32Headend Switch XTagATM1101 (2 hops) 10/35 Active, VCD=5Transit XTagATM1103 1/37 Active -> XTagATM1101 10/39 Active
Destination: 10.10.10.5/32Headend Switch XTagATM1102 (1 hop) 2/37 Active, VCD=5Transit XTagATM1103 1/39 Active -> XTagATM1102 2/39 Active
Destination: 10.10.10.1/32Headend Switch XTagATM1103 (1 hop) 1/34 Active, VCD=2Transit XTagATM1101 10/34 Active -> XTagATM1103 1/36 Active
Transit XTagATM1101 10/40 Active -> XTagATM1103 1/38 ActiveTransit XTagATM1101 10/42 Active -> XTagATM1103 1/40 Active
wsw-7206-5a#
How to Check Bindings—LSC
• Transit are LSC functionality
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wsw-7206-3a#show tag-switching forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hoptag tag or VC or Tunnel Id switched interface16 10/34 10.10.10.1/32 0 XT1101 point2point17 10/36 10.10.10.2/32 0 XT1101 point2point18 1/49 10.10.10.4/32 0 XT101 point2point19 244/45 10.10.10.5/32 0 XT1102 point2point
21 Untagged 10.1.1.1/32 0 XT1101 point2point wsw-7206-3a#
Forwarding Table
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wsw-7206-3a#show xtag cross-connect traffic interface xtag 1101 10 34
Phys desc: 0.11.1.0Interface: XTagATM1101 VPI/VCI: 10/34X-Phys desc: 0.3.1.0X-Interface: n/aX-VPI/VCI: 1/38
Conn-state: UPConn-type: output
Rx cells: n/a Rx cells discarded: n/aTx cells: 0 Tx cells discarded: 15 wsw-7206-3a#
Problem: LVCs Discarding Traffic
• Checking traffic discards from the LSC
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wsw-7206-3a#show xtagatm cross-connect interface xtagATM 1101 10 34
Phys desc: 0.11.1.0Interface: XTagATM1101Intf type: extended tag ATM VPI/VCI: 10/34X-Phys desc: 0.3.1.0X-Interface: n/a
X-Intf type: switch control portX-VPI/VCI: 1/40Conn-state: UPConn-type: outputCast-type: point-to-pointRx service type: n/a
Rx cell rate: n/aRx peak cell rate: n/aTx service type: Tag COS 0Tx cell rate: n/aTx peak cell rate: 91000 wsw-7206-3a#
Discards—Things to Check
• Check the QBin configuration as before
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wsw-7206-5a#show xtag cos-bandwidth-allocation xtag 1101
COS Bandwidth allocation
available 100 %standard 0 % premium 0 %
control 0 %
wsw-7206-5a# show xtag cos-bandwidth-allocation xtag 1102
COS Bandwidth allocation
available 100 %
standard 0 % premium 0 %control 0 %
wsw-7206-5a#sh xtag cos xtag 1103
LDP Uses Control
LDP CanTear DownLVCs
• Use dspqbinstats in the BPX/IGX
Discards—Things to Check• Check the COS allocation
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Discards—Things to Check
i8430-2a TN Cisco IGX 8430 9.3.11 Apr. 15 2001 06:22 GMT
Bus Bandwidth Usage for UXM card in slot 31 Last Updated on 04/15/01 06:20:36
FPkts/sec Cells/sec UBUs Minimum Reqd Bandwidth: 0 0 0 Average Used Bandwidth: 0 0 0Peak Used Bandwidth: 615 19104 6
Maximum Port Bandwidth: - 706415 177
Allocated Bandwidth: 44(Cell Only): - 176000(Cell+Fpkt): 88000 132000(Fpkts / 2 + Cells) <= 176000
Reserved Bandwidth: - 4000 1
Last Command: dspbusbw 31
Next Command:
• On an IGX, also check UBU allocation
Cnfbusbw
to Fix
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LCNLCN
LCNLCN
Setting Up an LVC Cross-Connect
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b8620-5a TN Cisco BPX 8620 9.3.11 Apr. 22 2001 23:27 EST
LCN=16311: vpi=xa, vci=x24, port=0, phy=0, rp=0 ing_vi=x3, egr_vi=x0, state=x3ilmi_session_id=0,ingr_abit_status=1, egr_abit_status=1, conn_type=0Conn 3fb7 (16311 dec)cks_blk_idx= 0 cksm= 0 part_idx= 0 gi_gf= 2 gi_gf2=40:ei_gf_loc= 0 ei_gf2_loc= 0 ei_gf3_loc= 0:ei_gf_rem= 0 ei_gf2_rem= 0 ei_gf3_rem= 0:local_ep_type= 0 rsnc_flag= 1 state=VSI_Cmtted( 3):diag status= 0, diag_result= 0, diag_dir= 0:loc_lin=0xb0100 loc_vpi_vci=(10,36) rem_lin=0x30100 rem_vpi_vci=(1, 54):is_derouted=0 is_vpc=0 :alarm= 0 :alarm_ack_pending= 0:f_serv_type=0x200 b_serv_type=0x200 ING_ECR=0 EGR_ECR=0:next= 3f9c prev= 3fc0 tcb_addr=a0cd8f60
Last Command: rsh 11 vsi cm VsiDisplayLcn 0 10 36
Next Command:
• VsiDisplayLcn <Port 0-based> <VPI> <VCI>
Finding the LCN
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b8620-5a TN Cisco BPX 8620 9.3.11 Apr. 22 2001 23:29 EST
VSI_CN_STATS_CELLS_FROM_PORT_IN 261 VSI_CN_STATS_CELLS_DISC_W_CLP0_IN 0 VSI_CN_STATS_CELLS_DISC_W_CLP1_IN 0 VSI_CN_STATS_CELLS_TO_PORT_EG 0 VSI_CN_STATS_CELLS_DISC_W_CLP0_EG 0 VSI_CN_STATS_CELLS_DISC_W_CLP1_EG 0
Last Command: rsh 11 vsi cm VsiCs 16311
Next Command:
• Be very careful with RSH commands
LVCs areunidirectional
Finding Statistics about LCN
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Running out of LVCs
00:30:32: %TCATM-4-XCONNECT_FAILED: 10.10.10.3/32 Head end terminating on XTagATM310200:30:32: %TCATM-4-XCONNECT_FAILED: 10.10.10.5/32 Tail end terminating on XTagATM3102
• Immediate symptom is error messageson LSC: TCATM-XCONNECT_FAILED; thismeans that the switch has insufficient LCNs for LVCs on one of its interface’s partitions
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A network that has run out of cross-connectsis basically non-functioning. There really isn’t
any way to control which [LVCs] get created
and which don’t. This may result in permanent
black holes and/or wildly overloaded control
processors. The network needs to be designed
from the start such that it won’t run out ofconnections.
Josh Gahm, LSC Developer
LVC Starvation
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Network Behaviors
• An eLSR will deal with LVC setup failureby sending IP traffic on control-vc(switched then by LSC processor)
• For MPLS services (VPNs) packets arediscarded (black holes)
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i8430-2a TN Cisco IGX 8430 9.3.11 Apr. 15 2001 05:09 GMT
VSI Resources Status for trunk 31.2 Partition 3
Minimum Lcns : 100 Minimum BW (cps) : 100000 Maximum Lcns : 300 Maximum BW (cps) : 100000Used Lcns : 300 Used BW (cps) : 0
Available Lcns : 0 Available BW (cps) : 100000Start VPI : 2 End VPI : 2
This Command: dspvsipartinfo 31.2 3
Hit DEL key to quit:
Identifying the Problem• From the switch we use dspvsipartinfo and
several RSH commands
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wsw-7206-2a#show controllers vsi descriptor
Phys desc: 0.31.2.0Log intf: 0x001F0200 (0.31.2.0)Interface: XTagATM3102IF status: up IFC state: ACTIVE
Min VPI: 2 Maximum cell rate: 100000 Max VPI: 2 Available channels: 0 Min VCI: 32 Available cell rate (forward): 100000 Max VCI: 65535 Available cell rate (backward): 100000
wsw-7206-5a#show controllers vsi descriptor 0.11.2.0
Phys desc: 0.11.2.0Log intf: 0x000B0200 (0.11.2.0)Interface: XTagATM1102IF status: up IFC state: ACTIVE
Min VPI: 2 Maximum cell rate: 100000 Max VPI: 2 Available channels: 0 Min VCI: 32 Available cell rate (forward): 100000 Max VCI: 65535 Available cell rate (backward): 100000
wsw-7206-2a#
Identifying the Problem
• From the LSC CLI or “VSI Master MIB”
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wsw-7206-2a#show tag-switching atm-tdp summaryTotal number of destinations: 3
TC-ATM bindings summaryinterface total active local remote Bwait Rwait IFwaitXTagATM3102 3 2 1 1 1 0 0
wsw-7206-2a# wsw-7206-5a#show tag-switching atm-tdp bindwait
Waiting for bind on XTagATM110210.10.10.5/32
wsw-7206-5a#
IFwait The Number of Bindings That Are Waiting for Learned Labels to BeInstalled for Switching Use
The Number of Bindings That Are Waiting for Learned Labels to BeInstalled for Switching Use
Rwait The Number of Bindings That Are Waiting for Resources (VPI/VCISpace) to Be Available on the Downstream Device
The Number of Bindings That Are Waiting for Resources (VPI/VCISpace) to Be Available on the Downstream Device
Bwait The Number of Bindings That Are Waiting for aLabel Assignment From the Neighbor LSR
The Number of Bindings That Are Waiting for aLabel Assignment From the Neighbor LSR
Identifying the Problem
• From the LSC (i.e. LSR)
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Possible Workaround 1
• Disable the eLSR functionality in the LSC,by disabling head-end VCs
• From 12.1(3)T
• Disable tail-end VCs: to stop other eLSRs
requesting LVCs to the LSCs, filter LSCloopback addresses in all eLSRs
wsw-7206-3a(config)#tag-switching atm disable-headend-vc
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Possible Workaround 2• Use unnumbered links or use request-tags for command
in all LSCs and eLSRs (12.1(5)T)
• The effect on LVC setup is the same as usingunnumbered links
wsw-7206-5a#conf tEnter configuration commands, one per line. End with CNTL/Z. wsw-7206-5a(config)#ip access-list standard BlockThis wsw-7206-5a(config-std-nacl)#deny 10.1.1.0 0.0.0.255
wsw-7206-5a(config-std-nacl)#permit any wsw-7206-5a(config-std-nacl)#exit wsw-7206-5a(config)#tag-sw request-tags for BlockThis ?
<cr>
wsw-7206-5a(config)#tag-sw request-tags for BlockThis
wsw-7206-5a(config)#^Z wsw-7206-5a#
• tag-switching advertise-tags has no effect on an LC-ATMinterface.
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Solution
i8430-2a TN Cisco IGX 8430 9.3.11 Apr. 15 2001 05:18 GMT
Trunk : 31.2 Maximum PVC LCNS: 256 Maximum PVC Bandwidth: 248207
(Statistical Reserve: 5000)
State MinLCN MaxLCN StartVPI EndVPI MinBW MaxBW Partition 1: DPartition 2: DPartition 3: E 500 2000 2 2 100000 100000
Last Command: cnfrsrc 31.2 256 y 3 E 500 2000 2 2 100000 100000
Cnfrsrc successful. Next Command:
• Dimension the Network correctly (minLCN toat least calculated LVC requirement)
• Increase LCN resources with cnfrsrc
• Enable VC-Merge with SwSW 9.3.30+
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Verification
• Available LCN resources
• Bindings active
wsw-7206-2a#show tag-switching atm-tdp summaryTotal number of destinations: 3
TC-ATM bindings summaryinterface total active local remote Bwait Rwait IFwaitXTagATM3102 3 3 1 2 0 0 0
wsw-7206-2a#
wsw-7206-2a#show controllers vsi descriptor
Phys desc: 0.31.2.0Log intf: 0x001F0200 (0.31.2.0)Interface: XTagATM3102IF status: up IFC state: ACTIVE
Min VPI: 2 Maximum cell rate: 100000 Max VPI: 2 Available channels: 634 Min VCI: 32 Available cell rate (forward): 100000 Max VCI: 65535 Available cell rate (backward): 100000
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Multiple Controller Problems
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LSC Redundancy Not Working
• Scenario • Symptom: Only oneXmplsATM from aninterface with multiplepartitions comes up
LSC
Controlled Switch
VSI tagigx4 TN Cisco IGX 8430 9.3.1Z Aug. 3 2000 11:05 PDT
VSI Controller Information
CtrlrId PartId ControlVC Intfc Type CtrlrIP VPI VCIRange
1 1 0 40-70 3.3 MPLS 10.1.1.12 2 0 40-70 19.3 MPLS 11.1.1.1
Last Command: dspctrlrs
The Slave Ids Correspond to the Slot Numbers in the Switch
VSI
LSC
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Possible Cause 1
• Overlapping control-VCstagigx4 TN Cisco IGX 8430 9.3.1Z Aug. 3 2000 11:05 PDT
Trunk : 7.1
Maximum PVC LCNS: 256 Maximum PVC Bandwidth: 65000(Statistical Reserve: 5000)
State MinLCN MaxLCN StartVPI EndVPI MinBW MaxBW
Partition 1: E 30 100 50 75 1000 10000
Partition 2: E 10 100 90 150 1000 10000
Partition 3: E 10 100 180 240 1000 5000
Last Command: dsprsrc 7.1
00:01:21: VSI Master: got NAK reason 12 ( sec VPI/VCI in use) in CONN CMT RSP rcvd on ATM1/0:0/42
connection 0x00030100/1/51 <-> 0x000B0100/0/32
00:01:21: Additional response data:
00.03.01.00 80.0b.01.00 13.99.00.8c 00.03.00.023f.b5.01.00 13.ab.00.1e 00.04.00.01 00.00.00.00
• Turn on debug vsi errors and see message‘VPI/VCI in use’
Info-Data
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Solution Problem 1
• Modify control-vc in one of the partitions
!interface XTagATM71ip unnumbered Loopback1no ip directed-broadcastno ip route-cache cefextended-port ATM5/0 vsi 0x00070100tag-switching atm control-vc 90 32tag-switching ipend
!interface XTagATM71ip unnumbered Loopback0no ip mroute-cacheextended-port ATM2/0 vsi 0x00070100tag-switching ipend
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Different Controllers Problem
• Scenario • Symptom: Only trafficfrom one controllerpasses (LVCs or SVCs)
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 24 2001 05:00 EST
BPX 8620 VSI controller information
Ctrl Id Part Id Control_VC Trunk Ctrlr Type Intfc VPI VCIRange
1 1 0 40-54 3.1 VSI VSI2 2 0 40-54 12.1 VSI AAL/5
Last Command: dspctrlrs
Next Command:
Service Expansion Shelf (SES) Is the PNNI Controller for BPX
LSC
Controlled Switch
VSI VSI
LSC
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Possible Cause 1
• Incorrect SCT (Service Class Template) used
b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 24 2001 05:03 EST
Service Class Templates
Template Name
1 MPLS1
2 ATMF1
3 ATMF2
4 ATMF_tagcos_1
5 ATMF_tagcos_26 ATMF_TAGABR_1
7 ATMF_TAGABR_2
8 atmf_TAGCoS _TAGABR_1
9 atmf_TAGCoS _TAGABR_2
Last Command: dspsct
Next Command:
• dspsct shows the available templates
Default template
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 24 2001 05:08 EST
Trunk: 11.1
Service Class Template ID: 1
VSI Partitions :channels bw vpi
Part E/D min max min max start end ilmi1 E 1000 6500 50000 100000 2 15 D2 E 1000 4000 50000 100000 50 50 D3 D 0 0 0 0 0 0 D
Last Command: dspvsiif 11.1
Next Command:
Possible Cause 1
• Verify the SCT used in trunks, portsand control ports
• SCT should also match on connected trunks
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b8620-3a TN Cisco BPX 8620 9.3.11 Apr. 24 2001 05:10 EST
Trunk: 11.1
Service Class Template ID: 1
VSI Partitions :channels bw vpi
Part E/D min max min max start end ilmi1 E 1000 6500 50000 100000 2 15 D2 E 1000 4000 50000 100000 50 50 D3 D 0 0 0 0 0 0 D
This Command: cnfvsiif 11.1 4
Interface has active VSI partition(s): changing SCT will be service affectingContinue?
Solution Problem 1
• Modify the SCT assigned to interfaces
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Summary
95
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Summary
• Troubleshooting ATM MPLS is easy
• ATM MPLS has two components totroubleshoot:
Controller => networking protocol
Switch => resources
• Find the problem first; solve it second
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References
http://www.cisco.com/univercd/cc/td/doc/product/wanbu/
bpx8600/mpls/index.htm
http://www.cisco.com/kobayashi/support/tac/troubleshoot.shtml
http://www.cisco.com/support/Errordecoder/error-decoder.html
http://www.cisco.com/warp/customer/105/mpls_index.shtml
http://www.cisco.com/warp/public/74/wansw_index.shtml
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121s
up/121sems/emdtcp.htm#xtocid17663
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Related Sessions
• PS-542 MPLS-Technology Optionsand Applications
• RST-130 Introduction to MPLS
• RST-230 Deploying Large Scale VPNwith MPLS
• RST-430 Advanced Developments andConcepts in MPLS
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TroubleshootingATM MPLS
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