Mailing List Archive

This commit checks for the maximum path per VRF before running the
multipath algorithm. This makes it possible to limit the number of
paths for a specific VRF, and not for an other one.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
---
bgpd/bgp_mpath.c | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/bgpd/bgp_mpath.c b/bgpd/bgp_mpath.c
index dc99591bf8ad..f117d2dbed8d 100644
--- a/bgpd/bgp_mpath.c
+++ b/bgpd/bgp_mpath.c
@@ -38,6 +38,7 @@
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_community.h"
#include "bgpd/bgp_ecommunity.h"
+#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_mpath.h"

bool
@@ -335,9 +336,13 @@ bgp_info_mpath_enqueue (struct bgp_info *prev_info, struct bgp_info *binfo)
void
bgp_info_mpath_dequeue (struct bgp_info *binfo)
{
- struct bgp_info_mpath *mpath = binfo->mpath;
+ struct bgp_info_mpath *mpath;
+ if (!binfo)
+ return;
+ mpath = binfo->mpath;
if (!mpath)
return;
+
if (mpath->mp_prev)
mpath->mp_prev->mp_next = mpath->mp_next;
if (mpath->mp_next)
@@ -471,6 +476,8 @@ bgp_info_mpath_update (struct bgp_node *rn, struct bgp_info *new_best,
int mpath_changed, debug;
char pfx_buf[INET6_ADDRSTRLEN], nh_buf[2][INET6_ADDRSTRLEN];
struct bgp_maxpaths_cfg *mpath_cfg = NULL;
+ struct prefix_rd *prd = NULL;
+ struct bgp_vrf *vrf = NULL;

mpath_changed = 0;
maxpaths = BGP_DEFAULT_MAXPATHS;
@@ -494,6 +501,31 @@ bgp_info_mpath_update (struct bgp_node *rn, struct bgp_info *new_best,
maxpaths = (new_best->peer->sort == BGP_PEER_IBGP) ?
mpath_cfg->maxpaths_ibgp : mpath_cfg->maxpaths_ebgp;
}
+ if (safi == SAFI_MPLS_VPN)
+ {
+ prd = &bgp_node_table (rn)->prd;
+ if (new_best)
+ vrf = bgp_vrf_lookup(new_best->peer->bgp, prd);
+ else if (old_best)
+ vrf = bgp_vrf_lookup(old_best->peer->bgp, prd);
+ }
+ else if(bgp_node_table (rn)->type == BGP_TABLE_VRF)
+ {
+ if (new_best)
+ vrf = bgp_vrf_lookup_per_rn(new_best->peer->bgp, afi, rn);
+ else if (old_best)
+ vrf = bgp_vrf_lookup_per_rn(old_best->peer->bgp, afi, rn);
+ }
+ if (vrf)
+ {
+ maxpaths = vrf->max_mpath;
+ if(debug && vrf)
+ {
+ char vrf_rd_str[RD_ADDRSTRLEN];
+ prefix_rd2str(&vrf->outbound_rd, vrf_rd_str, sizeof(vrf_rd_str));
+ zlog_debug ("vrf[%s] : mpath. max detected : %d", vrf_rd_str, maxpaths);
+ }
+ }

if (old_best)
{
--
2.1.4


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