spb-rs1/ipv4: show protocols all nwlink

nwlink BGP --- start 2019-12-04 Passive

Description:    nwlink/42893/AS42893/via NWLink
  BGP state:          Passive
    Neighbor address: 185.1.152.9
    Neighbor AS:      42893
  Channel ipv4
    State:          DOWN
    Table:          rib4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable