pbb-regolith: show protocols all ospf_ipv4

ospf_ipv4 OSPF ospf4 up 2021-06-11 13:16:52 Running

Channel ipv4
    State:          UP
    Table:          ospf4
    Preference:     150
    Input filter:   ACCEPT
    Output filter:  ACCEPT
    Routes:         25 imported, 4 exported, 25 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:            106          0          0          0        106
      Import withdraws:           26          0        ---          0         26
      Export updates:            112        106          0        ---          6
      Export withdraws:           27        ---        ---        ---          1