diff --git a/bgpd/bgp_zebra.c b/bgpd/bgp_zebra.c index 59528bf99273..42ff947e150b 100644 --- a/bgpd/bgp_zebra.c +++ b/bgpd/bgp_zebra.c @@ -303,11 +303,12 @@ static int bgp_ifp_down(struct interface *ifp) static int bgp_interface_address_add(ZAPI_CALLBACK_ARGS) { - struct connected *ifc; + struct connected *ifc, *connected; struct bgp *bgp; struct peer *peer; struct prefix *addr; struct listnode *node, *nnode; + bool v6_ll_in_nh_global; afi_t afi; safi_t safi; @@ -340,6 +341,30 @@ static int bgp_interface_address_add(ZAPI_CALLBACK_ARGS) addr = ifc->address; for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { + v6_ll_in_nh_global = false; + + if (IN6_IS_ADDR_LINKLOCAL( + &peer->nexthop.v6_global)) { + frr_each (if_connected, + ifc->ifp->connected, + connected) { + if (connected->address->family != + AF_INET6) + continue; + if (memcmp(&connected->address + ->u.prefix6, + &peer->nexthop.v6_global, + IPV6_MAX_BYTELEN) != + 0) + continue; + /* peer->nexthop.v6_global contains a link-local address + * that needs to be replaced by the global address. + */ + v6_ll_in_nh_global = true; + break; + } + } + /* * If the Peer's interface name matches the * interface name for which BGP received the @@ -350,14 +375,13 @@ static int bgp_interface_address_add(ZAPI_CALLBACK_ARGS) * into peer's v6_global and send updates out * with new nexthop addr. */ - if ((peer->conf_if && - (strcmp(peer->conf_if, ifc->ifp->name) == - 0)) && - ((IS_MAPPED_IPV6( - &peer->nexthop.v6_global)) || + if (((peer->conf_if && + (strcmp(peer->conf_if, ifc->ifp->name) == + 0)) || + v6_ll_in_nh_global) && + ((IS_MAPPED_IPV6(&peer->nexthop.v6_global)) || IN6_IS_ADDR_LINKLOCAL( &peer->nexthop.v6_global))) { - if (bgp_debug_zebra(ifc->address)) { zlog_debug("Update peer %pBP's current intf global addr from %pI6 to %pI6 and send updates", peer,