rc/ipv4: show protocols all pb_as59813_vli21_ipv4

pb_as59813_vli21_ipv4 BGP --- start 2021-04-12 13:50:03 Connect Socket: No route to host

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