whiskey/ipv4: show protocols all core_dump_mrt

core_dump_mrt BGP master start 2020-05-05 Connect Socket: Connection refused

Description:    Dump MRT BGP4MP
  Preference:     100
  Input filter:   REJECT
  Output filter:  (unnamed)
  Routes:         0 imported, 0 exported, 0 preferred
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:              0          0          0          0          0
    Import withdraws:            0          0        ---          0          0
    Export updates:              0          0          0        ---          0
    Export withdraws:            0        ---        ---        ---          0
  BGP state:          Connect
    Neighbor address: 10.42.1.21
    Neighbor AS:      20766
    Last error:       Socket: Connection refused