Figure 78: EVPN MPLS Seamless Integration with VPLS
The EVPN service can be introduced in the network one PE node at a time. The VPLS to EVPN migration
starts on PE1 by enabling EVPN in a VPN instance of VPLS service. As soon as EVPN is enabled, PE1 starts
advertising EVPN inclusive multicast route to other PE nodes. Since PE1 does not receive any inclusive
multicast routes from other PE nodes, VPLS pseudo wires between PE1 and other PE nodes remain up. PE1
keeps forwarding traffic using VPLS pseudo wires. At the same time, PE1 advertises all MAC address learned
from CE1 using EVPN route type-2. In the second step, EVPN is enabled in PE3. PE3 starts advertising
inclusive multicast route to other PE nodes. Both PE1 and PE3 discover each other through EVPN routes. As
a result, PE1 and PE3 shut down the pseudo wires between them. EVPN service replaces VPLS service
between PE1 and PE3. At this stage, PE1 keeps running VPLS service with PE2 and PE4. It starts EVPN
service with PE3 in the same VPN instance. This is called EVPN seamless integration with VPLS. The VPLS
to EVPN migration then continues to remaining PE nodes. In the end, all four PE nodes are enabled with
EVPN service. VPLS service is completely replaced with EVPN service in the network. All VPLS pseudo
wires are shut down.
Configure EVPN on the Existing VPLS Network
Perform the following tasks to configure EVPN on the existing VPLS network.
• Configure L2VPN EVPN address-family
• Configure EVI and corresponding BGP route-targets under EVPN configuration mode
• Configure EVI under a bridge-domain
See EVI Configuration under L2VPN Bridge-Domain, on page 527 section for how to migrate various
VPLS-based network to EVPN.
Configure L2 EVPN Address-Family
Perform this task to enable EVPN address family under both BGP and participating neighbor.
SUMMARY STEPS
1. configure
2. router bgp asn_id
3. nsr
4. bgp graceful-restart
5. bgp router-id ip-address
6. address-family l2vpn evpn
7. exit
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
521
EVPN Features
Configure EVPN on the Existing VPLS Network
To Next Page
Loading...
Need help?
General
