msk-rs1/ipv4: show protocols all Yandex

Yandex BGP --- down 15:43:29.780

Description:    Yandex/13238/AS-YANDEX
  BGP state:          Down
    Neighbor address: 31.44.187.87
    Neighbor AS:      13238
    Local AS:         50817
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       restart