spb-rs2/ipv4: show protocols all PC_Networks

PC_Networks BGP --- start 2020-01-21 Connect Received: Connection rejected

Description:    PC_Networks/35213/AS-PCN
  BGP state:          Connect
    Neighbor address: 31.44.186.218
    Neighbor AS:      35213
    Local AS:         50817
    Last error:       Received: Connection rejected
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable