rs1/ipv4: show protocols all pb_4_tier_as50515_1

pb_4_tier_as50515_1 BGP --- start 2019-05-31 Connect Socket: No route to host

Description:    Tier 1
  BGP state:          Connect
    Neighbor address: 86.104.125.149
    Neighbor AS:      50515
    Last error:       Socket: No route to host
  Channel ipv4
    State:          DOWN
    Table:          t_4_tier_as50515_1
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   50
      Action:       restart