tll-rs2/ipv4: show protocols all collector

collector BGP --- start 2019-05-14 Active Socket: Connection refused

BGP state:          Active
    Neighbor address: 172.18.19.230
    Neighbor AS:      50817
    Connect delay:    0.958/5
    Last error:       Socket: Connection refused
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   REJECT
    Output filter:  ACCEPT
    IGP IPv4 table: master4
  Channel ipv6
    State:          DOWN
    Table:          master6
    Preference:     100
    Input filter:   REJECT
    Output filter:  REJECT
    IGP IPv6 table: master6