spb-rs1/ipv4: show protocols all nwlink

nwlink BGP --- up 2021-07-15 Established

Description:    nwlink/42893/AS42893/via NWLink
  BGP state:          Established
    Neighbor address: 185.1.152.9
    Neighbor AS:      42893
    Local AS:         50817
    Neighbor ID:      146.66.191.253
    Local capabilities
      Multiprotocol
        AF announced: ipv4
      Route refresh
      Graceful restart
      4-octet AS numbers
      Enhanced refresh
      Long-lived graceful restart
    Neighbor capabilities
      Multiprotocol
        AF announced: ipv4
      Route refresh
    Session:          external route-server
    Source address:   185.1.152.255
    Hold timer:       144.494/180
    Keepalive timer:  3.009/60
  Channel ipv4
    State:          UP
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   500
      Action:       disable
    Routes:         3 imported, 0 filtered, 16721 exported, 3 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:              3          0          0          0          3
      Import withdraws:            0          0        ---          0          0
      Export updates:        1330997          6    1182226        ---     148765
      Export withdraws:       320250        ---        ---        ---      51328
    BGP Next hop:   185.1.152.255