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bgpd:aggr summary-only remove suppressed from evpn

Browse Source 
Ticket: #3534718 #3720960
Testing Done:

Config:
router bgp 65564 vrf sym_2
 bgp router-id 27.0.0.9
 !
 address-family ipv4 unicast
  redistribute static
 exit-address-family

vrf sym_2
 vni 8889
 ip route 63.2.1.0/24 blackhole
 ip route 63.2.1.2/32 blackhole
 ip route 63.2.1.3/32 blackhole
exit-vrf

tor-1:# vtysh -c "show bgp l2vpn evpn route" | grep -A3 63.2
*> [5]:[0]:[24]:[63.2.1.0] RD 27.0.0.9:19
                    27.0.0.9 (tor-1)
                                             0         32768 ?
                    ET:8 RT:28:8889 Rmac:44:38:39:ff:ff:29
--
*> [5]:[0]:[32]:[63.2.1.2] RD 27.0.0.9:19
                    27.0.0.9 (tor-1)
                                             0         32768 ?
                    ET:8 RT:28:8889 Rmac:44:38:39:ff:ff:29
*> [5]:[0]:[32]:[63.2.1.3] RD 27.0.0.9:19
                    27.0.0.9 (tor-1)
                                             0         32768 ?
                    ET:8 RT:28:8889 Rmac:44:38:39:ff:ff:29

tor-1(config)# router bgp 65564 vrf sym_2
tor-1(config-router)# address-family ipv4 unicast
tor-1(config-router-af)# aggregate-address 63.2.0.0/16 summary-only
tor-1(config-rou-f)# end

tor-1:# vtysh -c "show bgp l2vpn evpn route" | grep -A3 63.2.1
tor-1:# vtysh -c "show bgp l2vpn evpn route" | grep -A3 63.2
*> [5]:[0]:[16]:[63.2.0.0] RD 27.0.0.9:19
                    27.0.0.9 (tor-1)
                                             0         32768 ?
                    ET:8 RT:28:8889 Rmac:44:38:39:ff:ff:29

Signed-off-by: Chirag Shah <chirag@nvidia.com>
This commit is contained in:
Chirag Shah 2024-01-23 21:52:34 -08:00
parent cf4d838e69
commit 5cb7712b3e
3 changed files with 83 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
bgpd/bgp_evpn.c
View File

@ -315,18 +315,13 @@ static int is_vni_present_in_irt_vnis(struct list *vnis, struct bgpevpn *vpn)
* This would be following category:
* Non-imported route,
* Non-EVPN imported route,
* Non Aggregate suppressed route.
*/
bool is_route_injectable_into_evpn(struct bgp_path_info *pi)
bool is_route_injectable_into_evpn_non_supp(struct bgp_path_info *pi)
{
struct bgp_path_info *parent_pi;
struct bgp_table *table;
struct bgp_dest *dest;
/* do not import aggr suppressed routes */
if (bgp_path_suppressed(pi))
return false;
if (pi->sub_type != BGP_ROUTE_IMPORTED || !pi->extra ||
!pi->extra->vrfleak || !pi->extra->vrfleak->parent)
return true;
@ -344,6 +339,21 @@ bool is_route_injectable_into_evpn(struct bgp_path_info *pi)
return true;
}
/* Flag if the route is injectable into EVPN.
* This would be following category:
* Non-imported route,
* Non-EVPN imported route,
* Non Aggregate suppressed route.
*/
bool is_route_injectable_into_evpn(struct bgp_path_info *pi)
{
/* do not import aggr suppressed routes */
if (bgp_path_suppressed(pi))
return false;
return is_route_injectable_into_evpn_non_supp(pi);
}
/*
* Compare Route Targets.
*/
@ -7711,3 +7721,64 @@ bool bgp_evpn_mpath_has_dvni(const struct bgp *bgp_vrf,
return false;
}
/* Upon aggregate set trigger unimport suppressed routes
* from EVPN
*/
void bgp_aggr_supp_withdraw_from_evpn(struct bgp *bgp, afi_t afi, safi_t safi)
{
struct bgp_dest *agg_dest, *dest, *top;
const struct prefix *aggr_p;
struct bgp_aggregate *bgp_aggregate;
struct bgp_table *table;
struct bgp_path_info *pi;
if (!bgp_get_evpn() && !advertise_type5_routes(bgp, afi))
return;
/* Aggregate-address table walk. */
table = bgp->rib[afi][safi];
for (agg_dest = bgp_table_top(bgp->aggregate[afi][safi]); agg_dest;
agg_dest = bgp_route_next(agg_dest)) {
bgp_aggregate = bgp_dest_get_bgp_aggregate_info(agg_dest);
if (bgp_aggregate == NULL)
continue;
aggr_p = bgp_dest_get_prefix(agg_dest);
/* Look all nodes below the aggregate prefix in
* global AFI/SAFI table (IPv4/IPv6).
* Trigger withdrawal (this will be Type-5 routes only)
* from EVPN Global table.
*/
top = bgp_node_get(table, aggr_p);
for (dest = bgp_node_get(table, aggr_p); dest;
dest = bgp_route_next_until(dest, top)) {
const struct prefix *dest_p = bgp_dest_get_prefix(dest);
if (dest_p->prefixlen <= aggr_p->prefixlen)
continue;
for (pi = bgp_dest_get_bgp_path_info(dest); pi;
pi = pi->next) {
if (pi->sub_type == BGP_ROUTE_AGGREGATE)
continue;
/* Only Suppressed route remove from EVPN */
if (!bgp_path_suppressed(pi))
continue;
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("%s aggregated %pFX remove suppressed route %pFX",
__func__, aggr_p, dest_p);
if (!is_route_injectable_into_evpn_non_supp(pi))
continue;
bgp_evpn_withdraw_type5_route(bgp, dest_p, afi,
safi);
}
}
}
}

3
bgpd/bgp_evpn.h
View File

@ -182,5 +182,8 @@ extern vni_t bgp_evpn_path_info_get_l3vni(const struct bgp_path_info *pi);
extern bool bgp_evpn_mpath_has_dvni(const struct bgp *bgp_vrf,
struct bgp_path_info *mpinfo);
extern bool is_route_injectable_into_evpn(struct bgp_path_info *pi);
extern bool is_route_injectable_into_evpn_non_supp(struct bgp_path_info *pi);
extern void bgp_aggr_supp_withdraw_from_evpn(struct bgp *bgp, afi_t afi,
safi_t safi);
#endif /* _QUAGGA_BGP_EVPN_H */

3
bgpd/bgp_route.c
View File

@ -7799,6 +7799,9 @@ bool bgp_aggregate_route(struct bgp *bgp, const struct prefix *p, afi_t afi,
lcommunity = lcommunity_dup(aggregate->lcommunity);
}
/* Unimport suppressed routes from EVPN */
bgp_aggr_supp_withdraw_from_evpn(bgp, afi, safi);
bgp_aggregate_install(bgp, afi, safi, p, origin, aspath, community,
ecommunity, lcommunity, atomic_aggregate,
aggregate);