pbb-yuyu: show protocols all ospf_ipv4

ospf_ipv4 OSPF ospf4 up 2021-09-20 19:54:50 Running

Channel ipv4
    State:          UP
    Table:          ospf4
    Preference:     150
    Input filter:   ACCEPT
    Output filter:  ACCEPT
    Routes:         28 imported, 4 exported, 28 preferred
    Route change stats:     received   rejected   filtered    ignored   accepted
      Import updates:             81          0          0          0         81
      Import withdraws:           15          0        ---          0         15
      Export updates:             85         81          0        ---          4
      Export withdraws:           15        ---        ---        ---          0