BGP add-path

RouterOS Forwarding Protocols
1

@mikrotik

Came across this in v7 and in the help docs. Is this BGP add path as described in RFC 7911 or does it have something to do with multipath?

https://help.mikrotik.com/docs/pages/viewpage.action?pageId=328220

2

Doesn’t seem to do very much, at least not when added to a BGP Connection. Bird2 is showing this for a peer with ROSv7.6 with

add-path-out=all

enabled:

    Local capabilities
      Multiprotocol
        AF announced: ipv4
      Route refresh
      Graceful restart
        Restart time: 120
        AF supported: ipv4
        AF preserved:
      4-octet AS numbers
      ADD-PATH
        RX: ipv4
        TX: ipv4
      Enhanced refresh
      Long-lived graceful restart
    Neighbor capabilities
      Multiprotocol
        AF announced: ipv4
      Route refresh
      Graceful restart
      4-octet AS numbers
    Session:          internal multihop route-reflector AS4
3

From http://forum.mikrotik.com/t/bgp-add-path-out-seems-to-be-ignored/162916/1 --