core/ipv4: show protocols all NETSHELTER_KLEYREX_V4

NETSHELTER_KLEYREX_V4 BGP --- start 2022-02-28 Active Socket: No route to host

Description:    Netshelter Transit IPv4 at Kleyrex
  BGP state:          Active
    Neighbor address:
    Neighbor AS:      41047
    Local AS:         213127
    Connect delay:    0.884/5
    Last error:       Socket: No route to host
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   ACCEPT
    Output filter:  export_v4_rule