msk-rs2/ipv4: show protocols all nexus1

nexus1 BGP --- start 2021-07-23 Passive

Description:    nexus1/49778/as-nxss
  BGP state:          Passive
    Neighbor address: 185.1.161.138
    Neighbor AS:      49778
    Local AS:         49869
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable