tll-rs2/ipv4: show protocols all icewood

icewood BGP --- start 2021-02-14 Passive Error: Link down

Description:    icewood/201119/AS201119
  BGP state:          Passive
    Neighbor address: 37.9.49.59
    Neighbor AS:      201119
    Local AS:         57936
    Last error:       Error: Link down
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable