pbb-yuyu: show protocols all ospf_ipv6

ospf_ipv6 OSPF ospf6 up 2021-09-20 19:54:50 Running

Channel ipv6
    State:          UP
    Table:          ospf6
    Preference:     150
    Input filter:   ACCEPT
    Output filter:  ACCEPT
    Routes:         27 imported, 4 exported, 27 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:             84          0          0          0         84
      Import withdraws:           17          0        ---          0         17
      Export updates:             88         84          0        ---          4
      Export withdraws:           17        ---        ---        ---          0