gb-bgp/ipv6: show protocols all AS6939_SIT

AS6939_SIT BGP master up 2019-03-10 Established

Description:    London to AS6939
  Preference:     100
  Input filter:   (unnamed)
  Output filter:  (unnamed)
  Routes:         60074 imported, 4 exported, 48475 preferred
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:        1361196          0         36     122367    1238793
    Import withdraws:       134241          0        ---        941     133336
    Export updates:       26929608    1670310   25259294        ---          4
    Export withdraws:       139103        ---        ---        ---          0
  BGP state:          Established
    Neighbor address: 2001:470:11:55::1
    Neighbor AS:      6939
    Neighbor ID:      216.66.84.50
    Neighbor caps:    refresh AS4
    Session:          external AS4
    Source address:   2001:470:11:55::2
    Hold timer:       173/180
    Keepalive timer:  22/60