spb-rs2/ipv4: show protocols all ulan

ulan BGP --- up 2021-10-12 Established

Description:    ulan/48128/AS48128/via IPTP
  BGP state:          Established
    Neighbor address: 185.1.153.50
    Neighbor AS:      48128
    Local AS:         50817
    Neighbor ID:      94.232.64.1
    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
      Graceful restart
      4-octet AS numbers
    Session:          external route-server AS4
    Source address:   185.1.153.0
    Hold timer:       145.394/180
    Keepalive timer:  25.814/60
  Channel ipv4
    State:          UP
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   500
      Action:       disable
    Routes:         40 imported, 0 filtered, 106633 exported, 40 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:             40          0          0          0         40
      Import withdraws:            0          0        ---          0          0
      Export updates:         490786         69          0        ---     490717
      Export withdraws:       235606        ---        ---        ---     235602
    BGP Next hop:   185.1.153.0