spb-rs1/ipv4: show protocols all AirNet_2

AirNet_2 BGP --- start 2019-05-31 Active Socket: Connection closed

Description:    AirNet_2/44923/AS44923
  BGP state:          Active
    Neighbor address: 31.44.186.191
    Neighbor AS:      44923
    Connect delay:    4.330/5
    Last error:       Socket: Connection closed
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable