spb-rs2/ipv4: show protocols all premiergc

premiergc BGP --- start 2021-05-04 Passive Error: Link down

Description:    premiergc/47258/AS-PREMIER-GC
  BGP state:          Passive
    Neighbor address: 185.1.153.14
    Neighbor AS:      47258
    Local AS:         50817
    Last error:       Error: Link down
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable