If the peer is a non-direct EBGP peer, verify that the peer ebgp-max-hop command is
4.
configured.
Verify that a valid route to the peer is available.
5.
Use the ping command to verify the connectivity to the peer.
6.
Use the display tcp status command to verify the TCP connection.
7.
Verify whether an ACL disabling TCP port 179 is configured.
8.
246