Session [BGP AS [{#BGPM2_PEER_REMOTE_AS}] Peer [{#BGPM2_PEER_REMOTE_ADDR}]] is down, check the BGP configuration. For information on checking the BGP configuration, see https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/troubleshooting-bgp-sessions.html.