spb-rs2/ipv4: show protocols all nwlink

nwlink BGP --- up 2020-01-24 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:   185.1.153.0
    Hold timer:       133.320/180
    Keepalive timer:  33.527/60
  Channel ipv4
    State:          UP
    Table:          rib4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable
    Routes:         3 imported, 0 filtered, 10966 exported, 3 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:              6          0          0          3          3
      Import withdraws:            0          0        ---          0          0
      Export updates:        1612569          3    1300844        ---     311722
      Export withdraws:       612350        ---        ---        ---      93120
    BGP Next hop:   185.1.153.0