diff options
| -rw-r--r-- | bgpd/bgp_attr.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c index d349922c52..e5dc558fcf 100644 --- a/bgpd/bgp_attr.c +++ b/bgpd/bgp_attr.c @@ -5023,7 +5023,13 @@ void bgp_packet_mpunreach_prefix(struct stream *s, const struct prefix *p, { uint8_t wlabel[4] = {0x80, 0x00, 0x00}; - if (safi == SAFI_LABELED_UNICAST) { + /* [RFC3107] also made it possible to withdraw a binding without + * specifying the label explicitly, by setting the Compatibility field + * to 0x800000. However, some implementations set it to 0x000000. In + * order to ensure backwards compatibility, it is RECOMMENDED by this + * document that the Compatibility field be set to 0x800000. + */ + if (safi == SAFI_LABELED_UNICAST || safi == SAFI_MPLS_VPN) { label = (mpls_label_t *)wlabel; num_labels = 1; } |