connection-oriented ethernet attributes and applications
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Connection-oriented Ethernet Attributes and Applications
Ralph SantitoroRalph.Santitoro@us.fujitsu.com
3Q09 Toronto Meeting
July 22, 2009
2Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Contents
• CLE and COE: 2 implementations of Ethernet
• COE Attributes
• COE Applications
Connectionless Ethernet (CLE)
4Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Connectionless Ethernet (CLE) Challenges
• Ethernet switches forward frames to correct port based on destination MAC address (DA)
• If destination MAC address unknown, switches broadcast frames to all ports (called flooding)
• Flooding creates additional BW requirements on all links• Amount of flooding is not predictable
– DA becomes known by “learning”– DA becomes unknown when the bridges age out MAC table entries
in their memory ~ 5 minutes– Table entry will not age out if frames keep coming—but no one can
control this
Flooding plays havoc with QoS and resource reservationFlooding plays havoc with QoS and resource reservation
5Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Flooding Simplified
DA = Destination Address
Multipoint EVC
DA=C
A B
C
CE CE
CE
DA=C
DA=C
Flooding: Destination MAC address has unknown destination port
Multipoint EVC
DA=C
A B
C
CECE
CE
DA=C
Destination MAC address has a known destination port
I know where C is (for now) Where is C again?
6Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
CLE Challenges: Spanning Tree Protocol
A B
C
CE CE
CECE
STPBlocked Link
D
A B
C
CE CE
CE CED
LinkFailure
Failover
New STPBlocked Link
STP: up to 2s protection switching speeds. Difficult provisioningSTP: up to 2s protection switching speeds. Difficult provisioning
7Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Connection-oriented Ethernet (COE)
• Provides explicit definition of Ethernet paths– Disables Ethernet MAC address learning & flooding– Ethernet paths could be:
• End to end (EVC)
• Individual network segments
• Resource reservation and admission control per EVC per CoS– Per-connection (EVC/Path) traffic management and
traffic engineering
COE addresses the CLE challengesCOE addresses the CLE challenges
8Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Supported Network Topologies / MEF Service Types
Ring(E-Line or E-Tree)Hub & Spoke
(E-Tree or Service Multiplexed EVPL)
E-Line
Linear
COE supports many topologies to support popular Ethernet servicesCOE supports many topologies to support popular Ethernet services
Mesh(E-Line or E-Tree)
9Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
EMS/NMS Plays Critical Role for COE
• COE does not use bridging control protocols– NMS used to provision VLAN “cross connects” and tunnels
• COE relies on EMS/NMS for – Setup working/protect traffic engineered EVCs or network
segments– Setup bandwidth profiles (CIR/EIR) with BW reservation
• CIR is really “guaranteed” like with SONET/SDH
– Other OAM function such as Fault Management
COE places more emphasis on the importance of the NMSCOE places more emphasis on the importance of the NMS
10Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE: The best of both worlds
SONET / SDH•Deterministic and precision QoS•Bandwidth reserved per STS / STM•99.999% Availability•Highest Security (L1 service)
Connectionless Ethernet•Layer 2 Aggregation•Statistical Multiplexing•Flexible Bandwidth Granularity•Cost Effectiveness
Connection-Oriented Ethernet•Layer 2 Aggregation and Statistical Multiplexing•Deterministic and precision QoS•Bandwidth reserved per connection•Flexible Bandwidth Granularity•99.999% Availability•Cost effectiveness•Highest Security
COE makes Carrier Ethernet more like a Layer 1 service COE makes Carrier Ethernet more like a Layer 1 service but with all the benefits of Layer 2 Ethernetbut with all the benefits of Layer 2 Ethernet
11Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Key Benefits
AttributesAttributes BenefitsBenefits
Explicit Definition of Ethernet PathDeterministic, Predictable, Scalable, Secure
Resource Reservation and Connection Admission Control
Guaranteed SLA’s
Per Connection QoS and Traffic Engineering
Bandwidth ProfilesTiered Services
Robust Ethernet OAMComprehensive Monitoring and Troubleshooting
Carrier Class Service Protection < 50ms Protection / Restoration
11
12Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Why COE ?
• Makes Ethernet more like SONET which has dominated the metro network– Network operations procedures similar to SONET– Smooth transition for SONET-trained operations personnel
• Easily scales to meet large scale metro connectivity and aggregation requirements
• Ideally suited for:– EoX Aggregation for handoff to service edge networks– Mobile Backhaul Networks– High Performance EVPL and EPL services
COE focus today: Service Delivery and Infrastructure in the MetroCOE focus today: Service Delivery and Infrastructure in the Metro
13Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Different approaches to COE
• Ethernet-centric COE now being used in metro networks• MPLS-centric COE
– Standards being developed. – Proposed usage for interconnection of MPLS core routers
• Ethernet
MPLS-centric COE
Eth Eth
• Ethernet• MPLS Pseudowire (PW)• MPLS Label Switched Path (LSP)
VLAN TagSwitchingStatic PW T-MPLS MPLS-TP PBB-TE
Ethernet-centric COE
S-VLAN or PBB-TEEth EthMPLS LSP
PW PW
Ethernet-centric COE being deployed todayEthernet-centric COE being deployed today
COE Attributes
15Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
High Reliability•50ms Protection / Restoration
• G.8031•802.3ad Link Aggregation
Full Service Management•Link Fault Management
• 802.3ah•Service (EVC) Fault Management
• Y.1731, 802.1ag,
Security•Bridging disabled - no vulnerabilities•L2 DOS attacks mitigated•MAC DOS attacks mitigated
Standardized Services•EPL, EVPL, EP-Tree, EVP-Tree
• MEF 6, MEF 10.2
High Scalability•Millions of EVCs•Layer 2 Aggregation•Statistical Multiplexing
Deterministic QoS•Low Delay, Delay Variation, Loss
• Y.1731, 802.1ag, MEF 10.2•Bandwidth Resource Reservation
Attributes of Connection-oriented Ethernet
COECOEAttributesAttributes
COE is a high performance implementation of Carrier EthernetCOE is a high performance implementation of Carrier Ethernet
16Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Security: Comparable to SONET
• Management VLANs isolated from Subscriber traffic– similar to DCN isolation from subscriber traffic in SONET networks
• With COE, MAC Address Learning / Flooding is disabled– MAC Address spoofing cannot occur– MAC table overflow DOS attacks cannot occur
• With COE, vulnerable Layer 2 Control Protocols (L2CPs) like STP are disabled– Protocol-based vulnerabilities (DOS attacks) are mitigated
• With COE, bridging is disabled so additional ports cannot be bridged to the point-to-point service – Traffic snooping cannot occur
COE provides security comparable Layer 1 (EoSONET) COE provides security comparable Layer 1 (EoSONET) but without any of SONET bandwidth utilization issuesbut without any of SONET bandwidth utilization issues
17Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Ethernet OAM for COE
EVC1
EVC2
EVC3
Tunnel OAMEVC1, 2 and 3
Link OAMLink
Service OAMFLASHWAVE
CDS
FLASHWAVE
CDS
FLASHWAVE
CDS
MSC
StandardStandard Fault Fault ManagementManagement
Comparable to Comparable to SONETSONET
ITU-T Y.1731 / IEEE 802.1ag Tunnel Layer STS Path / VCG
ITU-T Y.1731 / IEEE 802.1ag Service (EVC) Layer VT1.5 or STS Path
IEEE 802.3ah Link (physical) Layer SONET Line
FLASHWAVE
CDS
COE leverages the complete set of Ethernet OAM standardsCOE leverages the complete set of Ethernet OAM standards
18Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Attributes for Network Survivability
• IEEE 802.3ad Link Aggregation Groups (LAG)– For local (link level) diversity and protection– If any fiber or port in LAG fails, other LAG members share the load – Can implement 1:1 protection with working/protect LAG members
• ITU-T G.8031 Linear Path Protection– for EVC path diversity and sub-50ms path protection– Similar to SONET 1+1 UPSR path protection– Simple Provisioning: Setup Working path and Protect path– Independent of Network Topology
• Rings, Meshes, Multiple Rings and Linear Topologies
COE achieves high availability via multiple levels of protectionCOE achieves high availability via multiple levels of protection
19Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Provides Dedicated Protection Switching
• Ethernet Linear Protection (ITU-T G.8031)– Dedicated protection resources– < 50ms protection switching time– Simple provisioning
LinkFailure Failover
20Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Link and Path Protection Equivalency
CECE
SONET1+1
OC-N1+1
OC-N
1+1OC-192
UPSR
Ethernet1:1
LAG1:1
LAG
GE GE PEPEG.8031
1+1 OC-N 1+1 OC-N
10GE 10GE
10GE
1:1LAG
1:1LAG
PEPECECE
COE protection similar to SONETCOE protection similar to SONET
COE Applications
22Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE Application Categories
• Transport and Infrastructure– Layer 2 Aggregation to Service Edge Networks– Mobile Backhaul– Triple Play Residential Broadband Backhaul
• IPTV, Video on Demand, Internet Access, Voice
– Access to Network-based IP/MPLS VPNs– Access to MPLS Inter-Metro Core Network
• Service Delivery– Layer 2 connectivity services
• EPL and EVPL • EP-Tree and EVP-Tree
– Ethernet Internet Access (EIA)
23Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE for Layer 2 EoX Aggregation Infrastructure
23
SONET
EoSEoS
GbE/10GbE
EoFEoF
PDH Access Network
PDH Access NetworkNxDS-3
NxDS-1EoPDHEoPDH
OC-n
AggregationEoX Access
GbE/10GbE
Service EdgesCPE
COE for Ethernet Aggregation for all Service Edge NetworksCOE for Ethernet Aggregation for all Service Edge Networks
EoCuEoCu
Internet Access
VoIP/ IMS
IP VPN
MPLS Inter-Metro LD Core
MTSO
Video Serving Office
C
OE
Eo
X
Ag
greg
ation
N
etwo
rk Copper Access Network
Copper Access Network GbE
Switched Ethernet Services
EoEoλλ
24Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Service Multiplexed
UNIUNIUNIUNIUNI
UNIUNIUNIUNI
UNIUNIUNIUNI
UNIUNIUNIUNI
COE COE NetworkNetwork
EVCEVC
EVCEVC
COE for Business Ethernet Services
EPL
UNIUNIUNIUNI
UNIUNIUNIUNI
UNIUNIUNIUNI
COE COE NetworkNetwork
EVCEVC
EVCEVC
EVPL
Service Service Provider Provider NetworkNetwork
EVCEVC
Wholesale Wholesale Access Provider Access Provider
NetworkNetworkUNIUNIUNIUNIUNIUNIUNIUNI E-NNIE-NNIE-NNIE-NNI
OVCOVC
Wholesale Ethernet Services
Retail Ethernet Services
COE COE
25Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
COE for Mobile Backhaul
• E-Line and E-Tree Service Types highly suitable for Mobile Backhaul Networks
Cell Sites
UNIUNIUNIUNI
MTSO
UNIUNIUNIUNI
COE Backhaul COE Backhaul Transport NetworkTransport Network
UNIUNIUNIUNI
UNIUNIUNIUNI UNIUNIUNIUNI
COE meets the stringent requirements of Mobile BackhaulCOE meets the stringent requirements of Mobile Backhaul
26Connection-oriented Ethernet Applications – 3Q09 Marketing Meeting – Toronto
Summary
• COE is a high performance implementation of Carrier Ethernet– With added Security benefits
• COE provides a common metro EoX aggregation solution– for Ethernet access to all service edge networks
• COE facilitates the evolution of SONET metro transport networks to Carrier Ethernet– COE is operationally similar to SONET
COE Discussion
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