pbb-regolith: show protocols all ospf_ipv6

ospf_ipv6 OSPF ospf6 up 2021-06-11 13:16:52 Running

Channel ipv6
    State:          UP
    Table:          ospf6
    Preference:     150
    Input filter:   ACCEPT
    Output filter:  ACCEPT
    Routes:         23 imported, 4 exported, 23 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:             71          0          0          0         71
      Import withdraws:           27          0        ---          0         27
      Export updates:             77         71          0        ---          6
      Export withdraws:           28        ---        ---        ---          1