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© 2014 Cisco and/or its affiliates. All rights reserved. [email protected] Cisco Public Building L2VPNs with Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Implementation and Use Cases April 23 rd , 2014 Tina Lam ([email protected]) Jose Liste ([email protected]) 1

Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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Page 1: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

© 2014 Cisco and/or its affiliates. All rights reserved. [email protected] Cisco Public

Building L2VPNs with Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Implementation and Use Cases April 23rd, 2014 Tina Lam ([email protected]) Jose Liste ([email protected])

1  

Page 2: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

© 2014 Cisco and/or its affiliates. All rights reserved. [email protected] Cisco Public

Today’s Presenters

§  Tina Lam ([email protected]) Product Manager Cisco

§  Jose Liste ([email protected]) Technical Marketing Engineer Cisco

2  

Page 3: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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Agenda

What  is  PBB-­‐EVPN  and  its  benefits?  

PBB-­‐EVPN  in  ASR9000  

Demonstra?on  

Summary  

Use  Cases  

Page 4: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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What is PBB-EVPN?

§  xEVPN family introduces next generation solutions for Ethernet services ‒  BGP control-plane for Ethernet Segment

and MAC distribution and learning over MPLS core

‒  Same principles and operational experience of IP VPNs

§  No use of Pseudowires ‒  Uses MP2P tunnels for unicast

‒  Multi-destination frame delivery via ingress replication (via MP2P tunnels) or LSM

§  Multi-vendor solutions under IETF standardization

E-LAN E-LINE E-TREE

EVPN VPWS

EVPN E-TREE

PBB-EVPN

EVPN

Focus of Presentation

Page 5: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Business Advantages • All-Active (per-flow) access load-balancing • Fast convergence (link / node / MAC moves)

Business Continuity Service Robustness

• Control-plane (BGP) learning in the Core. PWs no longer used • Scalability of IP VPN. MAC address scalability Designed to Scale

• Per-flow and per-service access load-balancing • PE load-balancing (BGP multi-pathing). Access / core ECMP CapEx Optimization

• Peer PEs auto-discovery. Redundancy group auto-sensing • Operational consistency with L3 IP VPN

Ease of Provision and Operation

• Support existing and new service types (E-LAN, E-Line, E-TREE, VLAN-aware bundling) Service Flexibility

• Open standard • Multi-vendor support Investment Protection

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Page 6: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

PBB-EVPN in Cisco ASR9000

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Introducing PBB-EVPN in Cisco ASR 9000

§  Introducing the next-generation of L2VPNs – Provider Backbone Bridging Ethernet VPN (PBB-EVPN)

§  Support across Cisco ASR 9000 series router family ‒ From ASR9001-S to ASR9922

§  Support starting with Cisco IOS-XR release 4.3.21 (FCS 09/2013)

§  Enhanced Ethernet Line Cards (Typhoon) required as Ingress and Egress linecards

(1) PBB-EVPN support started in IOS-XR 4.3.2 and 5.1.1 releases

Page 8: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB Ethernet VPN

§  Next generation solution for Ethernet multipoint (E-LAN) services by combining Provider Backbone Bridging (PBB - IEEE 802.1ah) and Ethernet VPN

§  Data-plane learning of local C-MACs and remote C-MAC to B-MAC binding

§  PEs run Multi-Protocol BGP to advertise local Backbone MAC addresses (B-MACs) & learn remote B-MACs ‒  Takes advantage of PBB encapsulation to simplify

BGP control plane operation – faster convergence

‒  Lowers BGP resource usage (CPU, memory) on deployed infrastructure (PEs and RRs)

§  Under standardization at IETF – WG draft: draft-ietf-l2vpn-pbb-evpn

Highlights

MPLS

PE1

CE1

PE2

PE3

CE3

PE4

B-MAC: B-M1 B-M2

B-M2

BGP MAC adv. Route EVPN NLRI MAC B-M1 via PE2

B-MAC: B-M1

Control-plane address advertisement / learning over Core (B-MAC)

Data-plane address learning from Access • Local C-MAC to local B-

MAC binding

Data-plane address learning from Core • Remote C-MAC to remote

B-MAC binding

PBB Backbone

Edge Bridge EVPN

PBB-EVPN PE

C-MAC: MB

C-MAC: MA

Page 9: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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To PBB or not to PBB? §  What is the value of combining PBB

and EVPN functions? §  Lower control-plane overhead than

EVPN alone ‒  PBB-EVPN uses only a sub-set of EVPN

routes

‒  Simpler and Faster failure convergence for all-active multi-homing scenarios

‒  Faster MAC move convergence handled in data-plane

§  Lower control-plane scale requirements than EVPN alone ‒  BGP MAC advertisements for smaller

Backbone MAC (B-MAC) address space

‒  Requires less resources (CPU, memory) on deployed infrastructure (PEs / RRs)

9  

PBB

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Provider Backbone Bridging Overview §  PBB (IEEE 802.1ah-2008) defines an

architecture that includes ‒  224 service instances (I-SID) per B-VLAN

‒  MAC-in-MAC

§  I-Component ‒  Learns & forwards using C-MACs

‒  Maintains a mapping table of C-MACs to B-MACs

‒  Performs PBB encap/decap on PIP

§  B-Component ‒  Learns & forwards using B-MACs

‒  Push / pop B-VLAN on CBP

10  

B-comp

I-comp

I-comp

I-comp

IB-BEB = I-/B-comp Backbone Edge Bridge I-SID = Backbone Service Instance Identifier PIP = Provider Instance Port CBP = Customer Backbone Port

PIP

CBP

IB-BEB

L2 C

ore

L2 A

cces

s

B-DA / B-SA B-Tag

I-TAG

C-DA / C-SA

Customer Frame

B-DA / B-SA

I-TAG

C-DA / C-SA

Customer Frame

C-DA / C-SA

Customer Frame

6B

4B

12B

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Concepts

Ethernet Segment

•  Represents a ‘site’ connected to one or more PEs

•  Uniquely identified by a 10-byte global Ethernet Segment Identifier (ESI)

•  Could be a single device or an entire network Single-Homed Device (SHD) Multi-Homed Device (MHD) Single-Homed Network (SHN) Multi-Homed Network (MHN)

BGP Routes

•  EVPN and PBB-EVPN define a single new BGP NLRI used to carry all EVPN routes

•  NLRI has a new SAFI (70) •  Routes serve control plane

purposes, including: MAC address reachability MAC mass withdrawal Split-Horizon label adv. Aliasing Multicast endpoint discovery Redundancy group discovery Designated forwarder election

EVPN Instance (EVI)

•  EVI identifies a VPN in the network

•  Encompass one or more bridge-domains, depending on service interface type Port-based VLAN-based (shown above) VLAN-bundling VLAN aware bundling (NEW)

BGP Route Attributes

•  New BGP extended communities defined

•  Expand information carried in BGP routes, including: MAC address moves C-MAC flush notification Redundancy mode MAC / IP bindings of a GW Split-horizon label encoding

PE  

BD  

BD  

EVI EVI

PE1  

PE2  

CE1  

CE2  

SHD  

MHD  

ESI1  

ESI2  

Route Types [1] Ethernet Auto-Discovery (AD) Route

[2] MAC Advertisement Route

[3] Inclusive Multicast Route

[4] Ethernet Segment Route

Extended Communities ESI MPLS Label

ES-Import

MAC Mobility

Default Gateway

Used by PBB-EVPN

Page 12: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Model Cisco ASR 9000

BD-1

BD-2

BD-3

BD-4 I-SID X

I-Component: PBB Edge Bridges Domain

B-Component: PBB Core Bridges Domain

I-SID Y

I-SID Z

BD-5

EVI aaa

EVI bbb

Interface (Physical / Bundle) Ethernet Segment Identifier (ESI) Source B-MAC

MPLS EVPN

Forwarder

Ethernet Flow Points (EFP) (Layer2 sub-if)

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PBB-EVPN Model Cisco ASR 9000

BD-1

BD-2

BD-3

BD-4 I-SID X

I-SID Y

I-SID Z

BD-5

EVI aaa

EVI bbb VFI

EoMPLS PW

VPLS VFI

MPLS EVPN

Forwarder

VPLS VFI (PBB-VPLS)1

VFI

(1) Co-existence of VPLS VFI and EVI under same Core BD in IOS-XR 5.1.2 (Apr. 14)

Connecting with existing services

I-Component: PBB Edge Bridges Domain

B-Component: PBB Core Bridges Domain

Page 14: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Encapsulation

B-DA B-SA

E-type (I-TAG 0x88E7) I-TAG

DA SA

802.1q Tag (0x8100) C-VID

Payload E-Type

Payload

DA SA

E-type (802.1q 0x8100) C-VID

Payload E-Type

Payload

EVPN MPLS label Control Word

PBB Header

Customer Frame

BD BD I-SID X EVI aaa

EVPN Forwarder

DA (NH router) SA

E-type (MPLS 0x8847) PSN MPLS label

EVPN MPLS label Control Word

PBB Header

Customer Frame

6B

6B

2B

4B

4B

4B

18B

4B

24-bit I-SID inside I-TAG

MPLS Ethernet Access

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MPLS

PBB-EVPN Operation Multicast Tunnel ID / Endpoint Discovery1

15  

BD

EVPN Forwarder

BD

BD I-SID X

I-SID Y Flood List Entry 1: PE 2 – label D Entry 2: PE 4 – label E

I-SID Y

EVI aaa

PE2

PE3

PE4

PE1

I-SID X Flood List Entry 1: PE 2 – label A Entry 2: PE 3 – label B Entry 3: PE 4 – label C

X

X

X

Y

Y

RR

At start-up, PEs send EVPN Inclusive Multicast routes to signal I-SID membership

Inclusive Multicast route signals MPLS label to be used in the downstream direction

1

2

2

EVPN Inclusive Multicast route

CE2

CE4

CE1

CE3

(1) Ingress / Head Replication model shown

Page 16: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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MPLS

PBB-EVPN Operation B-MAC Reachability Advertisement

16  

BD

EVPN Forwarder

BD

BD I-SID X

I-SID Y

EVI aaa

PE3 PE1

L2 Routing Information Base (RIB) B-DA2; Next Hop PE2; label F B-DA3; Next Hop PE3; label G B-DA4; Next Hop PE4; label H

CE2

PE2

CE4 PE4

B-DA2

B-DA4

RR

B-DA1

CE1

2

At start-up, PEs send EVPN MAC Advertisement route for local B-MAC/EVI

1

B-DA3

MAC Advertisement route signals MPLS label to be used in the downstream direction

EVPN MAC Advertisement route

CE3

Page 17: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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MPLS

PBB-EVPN Operation Multi-Destination Traffic Forwarding (Per-ISID Ingress Replication)

17  

BD

EVPN Forwarder

BD

BD I-SID X

I-SID Y Flood List Entry 1: PE 2 – label D Entry 2: PE 4 – label E

I-SID Y

EVI aaa

PE2

PE3

PE4

PE1

I-SID X Flood List Entry 1: PE 2 – label A Entry 2: PE 3 – label B Entry 3: PE 4 – label C

X

Ingress replication with Per-ISID flooding 3 copies for I-SID X 2 copies for I-SID Y

Multi-destination Traffic •  Unknown unicast •  Broadcast •  Multicast

1

2

CE2

CE4

CE3

X Y

X Y

CE1

B-DA1 C-MAC1a

SA: C-MAC1a DA: FFFF.FFFF.FFFF SA: C-MAC1b DA: FFFF.FFFF.FFFF

C-MAC1b

CAM Table I-SID X Entry1: C-MAC1a; B-DA1 CAM Table I-SID Y Entry1: C-MAC1b; B-DA1

3

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MPLS

PBB-EVPN Operation Known Unicast Traffic Forwarding

18  

BD

EVPN Forwarder

BD

BD I-SID X

I-SID Y

EVI aaa

PE3 PE1

CAM Table I-SID X Entry1: C-MAC1a; local Entry2: C-MAC2; B-DA2 Entry3: C-MAC4; B-DA4

L2 Routing Information Base (RIB) B-DA2; Next Hop PE2; label F B-DA3; Next Hop PE3; label G B-DA4; Next Hop PE4; label H

Known Unicast Traffic CE2 C-MAC2

PE2

CE4

C-MAC4 PE4

B-DA2

B-DA4

B-DA1 C-MAC1a CE1

SA: C-MAC1a DA: C-MAC2 SA: C-MAC1a DA: C-MAC4

1

Lookup

Lookup B-DA2 B-DA4

PE2; label F

PE4; label H

Known Unicast delivered to specific remote PEs

2

Page 19: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Failure Scenarios / Convergence Link / Segment Failure – All-Active Load-Balancing

MPLS

PE1

CE1

PE2

PE3

CE3

PE4

PE3, PE4 RIB VPN MAC ESI RT-a B-M1 n/a

Path List NH PE1 PE2

PE1 withdraws B-MAC advertised for failed segment (B-M1)

2

PE2 reruns DF election. Becomes DF for all I-SIDs on segment

4 PE3 / PE4 remove PE1 from path list for B-MAC (B-M1)

3

PE1 detects failure of one of its attached segments

1

PE1

B-M1

B-M1

B-M2

B-M2

PE1 withdraws Ethernet Segment Route

2

At idle state, PE3, PE4 install two (2) next hops for B-MAC B-M1

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PBB-EVPN Operational Scenarios MAC Mobility

20  

MAC Mobility

MPLS

PE1

CE1

PE2

PE3

CE3

PE4

MPLS

PE1

CE1

PE2

PE3

CE3

PE4

VID 100 SMAC: M1 DMAC: M2

PE1 learns C-MAC M1 on local port and forwards across core according to C-MAC DA to Remote B-MAC mapping

1 Host M1 moves from CE1 to CE3’s location

3

M1 M1 M1

VID 100 SMAC: M1 DMAC: F.F.F

Via data-plane learning, PE3 learns C-MAC M1 via B-MAC B-M1

2

After move, host sends Gratuitous/Reverse ARP at new location, PE3 updates C-MAC M1 location (local port.) PE3 also forwards across core according to C-MAC DA to Remote B-MAC mapping

4

Via data-plane learning, PE1 updates C-MAC M1 location (via B-MAC B-M2)

5

B-M1

B-M1

B-M2

B-M2

L1 L2 PBB

PE1 MAC Table I-SID xyz

C-MAC B-MAC M1 -

PE3 MAC Table I-SID xyz

C-MAC B-MAC M1 B-M1

PE3 MAC Table I-SID xyz

C-MAC B-MAC M1 -

PE1 MAC Table I-SID xyz

C-MAC B-MAC M1 B-M2

1

4

1 4

2

5

B-M1

B-M1

B-M2

B-M2

L3 L4 PBB

MAC Mobility event handled entirely by data-plane learning

Page 21: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

Multi-Homing Use Cases

21  

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PBB-EVPN

§  Null Ethernet Segment Identifier (ESI)

§  No DF election / No vlan carving

Access Multi-Homing Options

22  

PE1

CE1 MPLS Core

PE2

BMAC 1 ESI W

BMAC 1 ESI W

Dual Home Device (DHD) All-Active (Per-Flow) LB

VID X

VID X

PE1

CE1 MPLS Core

PE2

BMAC 2 ESI W

BMAC 1 ESI W

Dual Home Device (DHD)

Single-Active (Per-Service) LB

VID X

VID Y

§  Main candidate for Data Center deployments

§  Identical B-MAC and ESI on PEs

§  Different B-MACs and identical ESI on PEs

§  Per service (I-SID) carving (manual or automatic)

§  CE flush via STP TCN / MVRP

PE1

CE1

MPLS Core

ESI Null

Single Home Device (SHD) Single Home Network (SHN)

VID X

VID X

CE2 ESI Null

Page 23: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Access Multi-Homing Options (cont.)

23  

PE1

CE1 MPLS Core

PE3

BMAC 1 ESI W

BMAC 1 ESI W

Multi Home Device (MHD) All-Active (Per-Flow) LB

VID X

VID X

Multi Home Device (MHD)

Single-Active (Per-Service) LB

§  More than two (2) PEs in redundancy group

§  Same as DHD All-Active Load-balancing

§  More than two (2) PEs in redundancy group

§  Same as DHD Single-Active Load-balancing

PE2

PE1

CE1 MPLS Core

PE3

BMAC 3 ESI W

BMAC 1 ESI W

VID X

VID Z

PE2 VID Y VID X

BMAC 1 ESI W

BMAC 2 ESI W

Page 24: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

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PBB-EVPN Access Multi-Homing Options (cont.)

24  

MPLS Core

§  Treated as SHN by PEs

‒  Null ESI; No DF election / No service carving

§  Ring operation controlled by R-APS protocol

MPLS Core

§  Treated as SHN by PEs

‒  Null ESI; No DF election / No service carving

§  Segment operation controlled by REP protocol

§  Different B-MAC on PEs

§  Identical ESI on PEs

§  Per service (I-SID) carving (manual or automatic)

§  CE flush via STP TCN / MVRP

PE1

PE2 CE2

CE1

Dual Home Network (DHN) Single-Active (Per-Service) LB

MPLS Core

BMAC 2 ESI W

BMAC 1 ESI W

VID X

VID Y

PE1

PE2 CE2

CE1

REP

Dual Home Network (DHN) REP

ALT port

REP Edge No Neighbour

REP-AG REP-AG

ESI Null

ESI Null

VID X

VID Y

VID X

VID Y

PE1

PE2 CE2

CE1

G.8032 Open Sub-ring

Dual Home Network (DHN) ITU-T G.8032

R-APS

RPL Link

ESI Null

ESI Null

VID X

VID Y

VID X

VID Y

Page 25: Provider Backbone Bridging Ethernet VPN (PBB-EVPN) Cisco CKN TechAdvantage Webinar

Demonstration

25  

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Demonstration Topology

P

P

P

P

PE3 ASR9006

PE1 ASR9006

PE2 ASR9001

CE2

CE3

CE1

TG

TG

TG I-SID 111010

I-SID 111020

I-SID 111030

EVI 111

Three (3) E-LAN services between CE-1, CE-2, CE-3

DHD Active/Active per Flow

SHD SHD with Bundle

Legend: SHD = Single-Home Device DHD = Dual-Home Device TG = Traffic Generator

Lo0 14.14.14.7

Lo0 14.14.14.5

Lo0 14.14.14.6

Focus of Demonstration

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Summary §  PBB-EVPN is a next-generation L2VPN solution based on BGP control-plane for

MAC distribution/learning over the core §  PBB-EVPN was designed to address following requirements: ‒  All-active Redundancy and Load Balancing

‒  Simplified Provisioning and Operation

‒  Optimal Forwarding

‒  Fast Convergence

§  In addition, PBB-EVPN and its inherent MAC-in-MAC hierarchy provides: ‒  Simplified control plane operation and faster convergence

‒  Lower control-plane scale requirements (BGP CPU and memory)

‒  MAC address Scalability

§  PBB-EVPN applicability goes beyond DCI into Carrier Ethernet use cases

27  

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References

§  Cisco.com PBB-EVPN User Documentation: http://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r5-1/lxvpn/configuration/guide/lesc51x/lesc51pbb.html

§  (Video / Slides) Cisco Live 365: BRKMPL-2333: E-VPN and PBB-EVPN: The Next Generation of MPLS-Based Layer 2 VPN (2014 Milan) https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=76547

§  You can also meet us at Cisco Live 2014 – San Francisco (May 19-24) ‒ Breakout Session: BRKMPL-2333 ‒ Request a Meet The Expert (MTE) session

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PBB-EVPN Shipping Features

IOS-XR 4.3.2 – Aug 2013 XR 5.1.2 – Apr 2014

ASR9K1 PBB-EVPN Introduction • Port, VLAN, VLAN-bundle Mode • PE Auto-discovery • Ethernet Segment Identifier Auto-config w/ LACP • Single-homing • Single-active Multi-homing • All-active Multi-homing • Access Redundancy w/ LACP, G.8032, MST, nV Cluster

• Designated Forwarding (DF) election • MAC Mobility • Multicast Ingress Replication • BGP ISSU and NSR • BGP Route Reflector (RR) for PBB-EVPN

PBB-EVPN Enhancement • MAC Security on PBB-EVPN • PBB-EVPN and PBB-VPLS Seamless Integration

IOS XE 3.11 – Nov 2013

ASR1K • BGP Route Reflector (RR) for PBB-EVPN

(1) Requires use of Enhanced Ethernet Linecards (Typhoon) for access-facing and core-facing interfaces