Router A and Router B are peering via EBGP. Some of the prefixes sent

[MJ The Great]

Router A and Router B are peering via EBGP. Some of the prefixes sent by Router A are not showing in Router B’s BGP table. What could be the cause of this?

[M02@rt37]

Hello @MJ The Great 

Do you double check if the prefixes are advertised by router A ?

#sh ip bgp neighbor <ip-neighbor-router-B> advertised-routes

Are there any route-map our route-policy in outbound on Router A (router bgp / neighbor Router B) or in inbound on Router B (router bgp / neighbor Router A).

Check on Router B if you receive prefixes before filter:

#sh ip bgp neighbor <ip-neighbor-router-A> received routes

[MHM Cisco World]

Can I see bgp config