rix-rs2/ipv4: show protocols all cdnnow2

cdnnow2 BGP --- down 2021-06-22

Description:    cdnnow2/21030/AS-CDNNOW
  BGP state:          Down
    Neighbor address: 193.27.39.106
    Neighbor AS:      21030
    Local AS:         49634
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable