rs2/ipv4: show protocols all pb_6_s3c_as44901_1

pb_6_s3c_as44901_1 BGP --- start 2020-03-23 Connect

Description:    S3C 1
  BGP state:          Connect
    Neighbor address: 2001:7f8:64:225:0:4:4901:1
    Neighbor AS:      44901
  Channel ipv6
    State:          DOWN
    Table:          t_6_s3c_as44901_1
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   500
      Action:       restart