spb-rs2/ipv4: show protocols all linkey

linkey BGP --- up 2020-04-23 Established

Description:    linkey/13002/AS-LINKEY
  BGP state:          Established
    Neighbor address: 185.1.152.141
    Neighbor AS:      13002
    Local AS:         50817
    Neighbor ID:      213.159.127.1
    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
        Restart time: 120
        AF supported: ipv4
        AF preserved:
      4-octet AS numbers
      Enhanced refresh
    Session:          external route-server AS4
    Source address:   185.1.153.0
    Hold timer:       132.114/180
    Keepalive timer:  50.699/60
  Channel ipv4
    State:          UP
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable
    Routes:         13 imported, 0 filtered, 89346 exported, 13 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:            760          0         50        688         22
      Import withdraws:            1          0        ---          2          1
      Export updates:        4509872       6533          1        ---    4503338
      Export withdraws:      2583469        ---        ---        ---    2583420
    BGP Next hop:   185.1.153.0