core/ipv4: show protocols all TUNNELBROKER_V6

TUNNELBROKER_V6 BGP --- start 2022-02-28 Idle

Description:    Tunnelbroker v6
  BGP state:          Idle
    Neighbor address: 2a09:4c0:3e0:8c::1
    Neighbor AS:      58057
    Local AS:         213127
  Channel ipv6
    State:          DOWN
    Table:          master6
    Preference:     100
    Input filter:   do_not_import_own_prefix
    Output filter:  export_v6_rule