tll-rs2/ipv4: show protocols all icewood

icewood BGP --- down 2021-10-28

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