rc/ipv4: show protocols all pb_as59813_vli21_ipv4

pb_as59813_vli21_ipv4 BGP --- start 2021-07-23 20:40:06 Active Socket: No route to host

Description:    AS59813 - Delight Fiber
  BGP state:          Active
    Neighbor address: 185.1.179.37
    Neighbor AS:      59813
    Local AS:         60113
    Connect delay:    0.280/5
    Last error:       Socket: No route to host
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  REJECT