spb-rs2/ipv4: show protocols all mixmedia

mixmedia BGP --- start 2020-09-15 Passive Received: Administrative shutdown

Description:    mixmedia/59536/AS-MIXMEDIA-IX
  BGP state:          Passive
    Neighbor address: 185.1.153.18
    Neighbor AS:      59536
    Local AS:         50817
    Last error:       Received: Administrative shutdown
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable