v4.1 bstu4 features and applications copyright © siemens schweiz ag 2007
TRANSCRIPT
V4.1 BSTU4 Features and Applications
Copyright © Siemens Schweiz AG 2007
page 2 Siemens Switzerland Ltd
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Target for BSTU4 features
Extend and optimize the features of 4 port layer 2 switch compared with STU4 according to the demands and needs of ULAF+ customers
Enable the flexible application for various Ethernet services without external switch
Enable the realization of Ethernet services via TDM and packet data backbone networks with state-of-the-art configuration and maintenance using QoS and CoS according to IEEE standards
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BSTU4: New features compared with STU4
STU44 ports L2 switch VLAN transparent
BSTU4
Embedded Clock Operation
Integrated into ULAF+V5.0
VLAN Support (up to 16 VLANs)
VLAN Termination+ Q-in-Q QoS
Port prioritization Support of BSRU
Link aggregation4, 8 or 16 wire pairs scalable
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BSTU4: 4 port L2-switch
Individually configurable 10/100BaseTX ports IEEE 802.3u(using LCT or AccessIntegratorEM ULAF+)
• Plug-in: 3 ports at the frontand one connected to the backplane of ULAF+ V5.0 subrack • Desktop: 4 ports
Ports can be individually deactivated to save power inremote powered locations
10BaseT/100BaseTX
Full- / half duplex operation; Auto negotiating
Link Failure Propagation (LFP)
Flow control (pause frames or back pressure)
Automatic MDI / MDI-X crossover
VLAN and QoS supported
Handling of oversized frames up to 2000 bytes
Link Aggregation (IEEE 802.3ad)
Self-learning switch (1024 MAC addresses
Ingress Rate Limiting
Broadcast Storm Protection
VLAN IEEE 802.1Q support
Provider VLAN IEEE 802.1ad
16 simultaneous active VLAN
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Quality of Service
Priority Queues
• 4 priority queues
• Transmit Queue Algorithms :
“Weighted Fairness Queuing” (WFQ)
“Strict Priority Queuing” (SP)
Prioritization
• Based on port
• Based on IEEE 802.1p
• Based on DSCP
• Based on VLAN ID
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Applications (1): STU4 versus BSTU4
STU4
QoS-- Based on port-- Based on IEEE 802.1p -- Based on DSCP-- Based on VLAN ID
STU4
C-VLANC-VLAN
BSTU4 BSTU4
C-VLAN: Customer Virtual LAN
SHDSL or networkconnections
C-VLAN C-VLAN
: External switch
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Applications (2): Point-to-point connections
BSTU4
10/100BaseTx 10/100BaseTx
SHDSL via 1…4 wire pairs
C-VLAN A
C-VLAN A
BSTU4
C-VLANB
VoIP
C-VLANB
VoIP-Classify ingress frames (QoS) based on Port / 802.1p / DSCP/VLAN-Limit bandwidth
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Applications (3): Connections via TDM based backbone network
BSTU4
C-VLAN A
BSTU4
VoIP VoIP
C-VLAN A
C-VLAN B
QSTU QSTU
TDM Network
C-LANB
-Classify ingress frames (QoS) based on Port / 802.1p / DSCP/VLAN-Limit bandwidth
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Applications (4): Connections via Metro Ethernet Network
BSTU4
10/100BaseTx
C-VLAN A
BSTU4
VoIP
VoIP P-VLAN Termination Points -Add P-VLAN ID -Classify ingress frames (QoS) - Limit bandwidth
C-VLAN A
C-VLAN B
BSTU4
BSTU4
C-LANB
P-VLAN (Provider VLAN)
C-VLAN A
VoIP
C-LANBBSTU4
ULAF+ V5 subrack
GbE
Metro Ethernet Network
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Integration in ULAF+ V5
BSTU4 plug-in version with direct access to backplane of ULAF+ V5.0 subrack (S3105-B628-A210)
No Ethernet cabling necessary
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Applications in ULAF+ V5 using BSTU4 plug-in
BSTU4 plug-in
ULAF+ V5 subrack*
BSTU4 plug-in
GbE uplink(optical or copper)
WAN
C-VLAN A
C-VLAN B
Packet Network
BSTU4
*S3105-B628-A210
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MCS Comparison with another copper bonding schemes
*) Not yet implemented in ULAF+ systems. Can be implemented on customer request.
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MCS Multi Channel Synchronisation
Bundling of 2..4 channels over transparent or structured TDM networks
Resiliency
Independent Rx- and Tx- data streams
Network delta delay compensation
Minimised additional delay caused by MCS (< 100µs)
Autonomous detection and correction of wire pair or channel interchange
Proprietary and patented inverse multiplexing algorithm
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Embedded clock operation
BSTU desktop units are equipped with 2,048MHz clock input/output interface(BNC 75 Ohm). High quality clock can be provided to the remote location usnig synchronous SHDSL transmission.
SHDSL via 1…4 wire pairs
BSTU4 (RT)
ULAF+ subrack 2,048MHz clock inpute.g.from SDH
Timing output
Mobile network BTS / NodeB
BSTU4 COT
BSTU4 (COT)
2,048MHz clock input
Timing outputSHDSL via 1…4 wire pairs
BSTU4 (RT)
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BSTU4 scalability2x 4 wire pairs with Link Aggregation, up to 45,6Mbit/s
NT1
1
1
1
BSTU4 BSRU BSRU BSTU4
LTP1 2
2
2
2
P1
1... …4
NT1
1
1
1
LTP1 2
2
2
2
P1
P2 P2
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BSTU4DSLAM Backhaul with Link Aggregation
Link Aggregation (IEEE 802.3ad) Ethernet Frames are distributed among different links (based on MAC-Addresses) Up to 91,2Mbit/s over up to 16 wire pairs can be aggregated Easy to set-up and configure with Ulaf+ LCT or AccessIntegrator
BSTU4
BSTU4
BSTU4
BSTU4 BSTU4
BSTU4
BSTU4
BSTU4
22.8MBit/s
22.8MBit/s
22.8MBit/s
22.8MBit/s
Incoming Packets with different MAC addresses
Σ=91,2Mbit/se.g. DSLAM
Metro EthernetNetwork
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