hels-rs1/ipv4: show protocols all zextel

zextel BGP --- start 2021-06-18 Passive

Description:    zextel/49954/AS49954
  BGP state:          Passive
    Neighbor address: 193.27.37.49
    Neighbor AS:      49954
    Local AS:         39607
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   500
      Action:       disable