msk-rs2/ipv4: show protocols all Dagnet

Dagnet BGP --- start 2019-09-12 Connect BGP Error: Hold timer expired

Description:    Dagnet/15428/AS-DAGNET
  BGP state:          Connect
    Neighbor address: 31.44.187.165
    Neighbor AS:      15428
    Last error:       BGP Error: Hold timer expired
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable