The issue description is as follows:
1. Backbone router 2 sends routes to the new router of AS 50000 through EBGP. The carried community is 20000:100.
2. Run the route-policy command and add community 22421:100 on access router 2.
route-policy from20000 permit node 10
if-match extcommunity-filter 20
apply extcommunity rt 22421:100 additive
3. The specific topology is as follows.
Run the following command. No notification is sent to the peer.
After the apply extcommunity command is run on the AR2200 series routers, receipt and advertisement of inter-AS VPN routes are affected. For details, see the following description in the product documentation.