admin@sonic:~$ sudo systemctl status bgp
● bgp.service - BGP container
   Loaded: loaded (/etc/systemd/system/bgp.service; enabled)
   Active: active (running) since Sun 2017-03-26 22:26:16 UTC; 4min 7s ago
 Main PID: 706 (bgp.sh)
   CGroup: /system.slice/bgp.service
           ├─706 /bin/bash /usr/bin/bgp.sh start
           └─824 docker start -a bgp

Mar 26 22:27:28 sonic bgp.sh[706]: Starting Quagga daemons (prio:10): zebra bgpd*** Error reading config: There is no such command.
Mar 26 22:27:28 sonic bgp.sh[706]: *** Error occured processing line 15, below:
Mar 26 22:27:28 sonic bgp.sh[706]: router bgp None
Mar 26 22:27:28 sonic bgp.sh[706]: .
Mar 26 22:27:28 sonic bgp.sh[706]: Starting Quagga monitor daemon: watchquagga.
Mar 26 22:27:28 sonic bgp.sh[706]: watchquagga[68]: watchquagga 0.99.24.1 watching [zebra bgpd], mode [monitor]
Mar 26 22:27:28 sonic bgp.sh[706]: root@sonic:/# Waiting for connection...
Mar 26 22:27:28 sonic bgp.sh[706]: watchquagga[68]: bgpd state -> down : initial connection attempt failed
Mar 26 22:27:28 sonic bgp.sh[706]: watchquagga[68]: zebra state -> up : connect succeeded
Mar 26 22:27:33 sonic bgp.sh[706]: Connected!