What type of router are you using as BGP peer? Are there logs on that router? Also, is this a new installation or was this working before and only started to fail now? Please also show the output of "openstack bgp speaker list" and "openstack bgp peer list".
What type of router are you using as BGP peer? Are there logs on that router? Also, is this a new installation or was this working before and only started to fail now? Please also show the output of "openstack bgp speaker list" and "openstack bgp peer list".