diff options
| author | Donatas Abraitis <donatas@opensourcerouting.org> | 2022-11-18 15:47:50 +0200 |
|---|---|---|
| committer | Donatas Abraitis <donatas@opensourcerouting.org> | 2022-11-18 16:17:15 +0200 |
| commit | 6eeb9255450020cb90abf2d4e7de6c31a646e609 (patch) | |
| tree | b933b00b4513dd43d451962823455de9e101d3d5 /bgpd/bgp_updgrp_packet.c | |
| parent | 9a84cb612e8532d6f14d4702ecd9dfd6af408be5 (diff) | |
bgpd: Allow overriding MPLS VPN next-hops via route-maps
Just do not reset next-hop for MPLS VPN routes.
Example of 172.16.255.1/32 (using extended next-hop capability):
```
pe2# sh bgp ipv4 vpn
BGP table version is 4, local router ID is 10.10.10.20, vrf id 0
Default local pref 100, local AS 65001
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 192.168.1.2:2
*>i10.0.0.0/24 2001:db8:1::1 0 100 0 65000 ?
UN=2001:db8:1::1 EC{192.168.1.2:2} label=1111 type=bgp, subtype=0
*>i172.16.255.1/32 2001:db8::1 0 100 0 65000 ?
UN=2001:db8::1 EC{192.168.1.2:2} label=1111 type=bgp, subtype=0
*>i192.168.1.0/24 2001:db8:1::1 0 100 0 65000 ?
UN=2001:db8:1::1 EC{192.168.1.2:2} label=1111 type=bgp, subtype=0
*>i192.168.2.0/24 2001:db8:1::1 100 0 65000 ?
UN=2001:db8:1::1 EC{192.168.1.2:2} label=1111 type=bgp, subtype=0
Route Distinguisher: 192.168.2.2:2
*> 10.0.0.0/24 192.168.2.1@4< 0 50 0 65000 ?
UN=192.168.2.1 EC{192.168.2.2:2} label=2222 type=bgp, subtype=5
*> 172.16.255.1/32 192.168.2.1@4< 50 0 65000 ?
UN=192.168.2.1 EC{192.168.2.2:2} label=2222 type=bgp, subtype=5
*> 192.168.1.0/24 192.168.2.1@4< 50 0 65000 ?
UN=192.168.2.1 EC{192.168.2.2:2} label=2222 type=bgp, subtype=5
*> 192.168.2.0/24 192.168.2.1@4< 0 50 0 65000 ?
UN=192.168.2.1 EC{192.168.2.2:2} label=2222 type=bgp, subtype=5
Displayed 8 routes and 8 total paths
```
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
Diffstat (limited to 'bgpd/bgp_updgrp_packet.c')
| -rw-r--r-- | bgpd/bgp_updgrp_packet.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/bgpd/bgp_updgrp_packet.c b/bgpd/bgp_updgrp_packet.c index 9de97cf060..b52d67ed3c 100644 --- a/bgpd/bgp_updgrp_packet.c +++ b/bgpd/bgp_updgrp_packet.c @@ -379,10 +379,11 @@ struct stream *bpacket_reformat_for_peer(struct bpacket *pkt, route_map_sets_nh = (CHECK_FLAG(vec->flags, - BPKT_ATTRVEC_FLAGS_RMAP_IPV4_NH_CHANGED) - || CHECK_FLAG( - vec->flags, - BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS)); + BPKT_ATTRVEC_FLAGS_RMAP_IPV4_NH_CHANGED) || + CHECK_FLAG(vec->flags, + BPKT_ATTRVEC_FLAGS_RMAP_VPNV4_NH_CHANGED) || + CHECK_FLAG(vec->flags, + BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS)); switch (nhlen) { case BGP_ATTR_NHLEN_IPV4: @@ -468,10 +469,12 @@ struct stream *bpacket_reformat_for_peer(struct bpacket *pkt, route_map_sets_nh = (CHECK_FLAG(vec->flags, - BPKT_ATTRVEC_FLAGS_RMAP_IPV6_GNH_CHANGED) - || CHECK_FLAG( + BPKT_ATTRVEC_FLAGS_RMAP_IPV6_GNH_CHANGED) || + CHECK_FLAG( vec->flags, - BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS)); + BPKT_ATTRVEC_FLAGS_RMAP_VPNV6_GNH_CHANGED) || + CHECK_FLAG(vec->flags, + BPKT_ATTRVEC_FLAGS_RMAP_NH_PEER_ADDRESS)); /* * The logic here is rather similar to that for IPv4, the @@ -1276,6 +1279,15 @@ bpacket_vec_arr_inherit_attr_flags(struct bpacket_attr_vec_arr *vecarr, SET_FLAG(vecarr->entries[BGP_ATTR_VEC_NH].flags, BPKT_ATTRVEC_FLAGS_RMAP_IPV6_GNH_CHANGED); + if (CHECK_FLAG(attr->rmap_change_flags, BATTR_RMAP_VPNV4_NHOP_CHANGED)) + SET_FLAG(vecarr->entries[BGP_ATTR_VEC_NH].flags, + BPKT_ATTRVEC_FLAGS_RMAP_VPNV4_NH_CHANGED); + + if (CHECK_FLAG(attr->rmap_change_flags, + BATTR_RMAP_VPNV6_GLOBAL_NHOP_CHANGED)) + SET_FLAG(vecarr->entries[BGP_ATTR_VEC_NH].flags, + BPKT_ATTRVEC_FLAGS_RMAP_VPNV6_GNH_CHANGED); + if (CHECK_FLAG(attr->rmap_change_flags, BATTR_RMAP_IPV6_LL_NHOP_CHANGED)) SET_FLAG(vecarr->entries[BGP_ATTR_VEC_NH].flags, |