From 8e86ffce8251f4e48f61b6d8e89966d037ef8e59 Mon Sep 17 00:00:00 2001 From: "Ondrej Zajicek (work)" Date: Sun, 1 Jul 2018 01:03:16 +0200 Subject: [PATCH] BGP: Use implicit-NULL label when announcing MPLS routes with local next-hop We currently cannot assing local labels, but we can still be LSP egress router. Therefore when we announce labeled route with local next-hop, we should announce implicit-NULL label instead of rejecting it completely. --- proto/bgp/packets.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c index d67ef0b2..c40b8ec2 100644 --- a/proto/bgp/packets.c +++ b/proto/bgp/packets.c @@ -875,7 +875,10 @@ bgp_update_next_hop_ip(struct bgp_export_state *s, eattr *a, ea_list **to) /* TODO: Use local MPLS assigned label */ if (s->mpls) - bgp_unset_attr(to, s->pool, BA_MPLS_LABEL_STACK); + { + u32 implicit_null = BGP_MPLS_NULL; + bgp_set_attr_data(to, s->pool, BA_MPLS_LABEL_STACK, 0, &implicit_null, 4); + } } }