Configuration on PE2:
interface bundle-Ether1.1 l2transport
encapsulation dot1q 1
evpn
interface bundle-Ether1
ethernet-segment
load-balancing-mode per-service
l2vpn
pbb
backbone-source-mac 00cc.00dd.00ee
bridge group gr1
bridge-domain bd1
interface bundle-Ether1.1
pbb edge i-sid 400 core-bridge core_bd1
bridge group gr2
bridge-domain core_bd1
pbb core
evpn evi 1000
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
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Implementing IEEE 802.1ah Provider Backbone Bridge
PBB-EVPN Multi Homed Network