Provider Backbone Bridging Ethernet VPN
The Provider Backbone Bridging Ethernet VPN (PBB-EVPN) is a next generation L2VPN solution that
addresses resiliency and forwarding policy requirements. This feature also introduces advanced multihoming
options, support for multipath and user-defined BGP policy capabilities to Ethernet L2VPNs. PBB-EVPN
uses BGP for MAC address distribution and learning over the packet-switched network (PSN). PBB-EVPN
is a combination of the capabilities of PBB and Ethernet VPN that addresses these Carrier Ethernet and data
center interconnect requirements:
• All-active Redundancy and Load Balancing
• Simplified Provisioning and Operation
• Optimal Forwarding
• Fast Convergence
• MAC Address Scalability
Ethernet VPN
Ethernet Virtual Private Network (EVPN) is a solution for secure and private connectivity of multiple sites
within an organization. The EVPN service extends the benefits of Ethernet technology to the Wide Area
Network (WAN). This service is delivered over MPLS networks.
EVPN allows you to manage routing over a virtual private network, providing complete control and security.
EVPN introduces a solution for multipoint L2VPN services, with advanced multi-homing capabilities, using
BGP for distributing customer or client MAC address reachability information over the MPLS/IP network.
EVPN advertises each customer MAC address as BGP routes, therefore allowing BGP policy control over
MAC addresses.
Figure 45: MAC Distribution in BGP (EVPN)
In the above figure, the provider edge (PE) routers run multi-protocol BGP to advertise and learn MAC
addresses over MPLS. The customer MAC addresses are learnt in the data plane over attachment circuits
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
363
Implementing IEEE 802.1ah Provider Backbone Bridge
Provider Backbone Bridging Ethernet VPN
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