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ospf6d: do not originate Type-4 into NSSA

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In a topology like:
     r1(ASBR) ---- 0.0.0.0 ---- r2(ABR) ---- 1.1.1.1 -----r3

where r1 is redistributing statics and area 1.1.1.1 is NSSA, the ABR r2 should
not originate type-4 LSA into the NSSA area. From RFC 3101: "NSSA border routers
should not originate Type-4 summary-LSAs into their NSSAs."

This PR prevents the above LSA of being originated by the ABR r2

Signed-off-by: ckishimo <carles.kishimoto@gmail.com>
This commit is contained in:
ckishimo 2021-11-09 00:07:35 +01:00
parent 5a0e96e65b
commit c01326c6fb
1 changed files with 2 additions and 1 deletions
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3
ospf6d/ospf6_abr.c
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@ -394,7 +394,8 @@ int ospf6_abr_originate_summary_to_area(struct ospf6_route *route,
return 0;
}
if ((route->type == OSPF6_DEST_TYPE_ROUTER) && IS_AREA_STUB(area)) {
if ((route->type == OSPF6_DEST_TYPE_ROUTER)
&& (IS_AREA_STUB(area) || IS_AREA_NSSA(area))) {
if (is_debug)
zlog_debug(
"Area has been stubbed, purge Inter-Router LSA");