proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-08-13 21:10:28 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ospf6d: ospf6 route installation when changed from nssa to regular area.

Browse Source 
Problem:
Delay in ospfv3 route installation when area gets converted to regular
from NSSA.

RCA:
when area gets converted from NSSA to normal the type-7(NSSA_LSAs)
gets flushed from the area, as a result the external routes
learnt from these type-7s gets removed. Once the area is moved
to nomral the type 5 lsas needs to flooded through the area
so that routes are re-learnt. however there is a delay in
flooding of these routes until these routes are refreshed.
Due to this there is delay installation of these routes.

Fix:
The Fix involves refreshing of the type 5 lsas once the area
is changed from nssa to regular area.

Signed-off-by: Manoj Naragund <mnaragund@vmware.com>
This commit is contained in:
Manoj Naragund 2022-10-25 01:08:43 -07:00
parent 695f387ed8
commit 27c2335685
1 changed files with 48 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
ospf6d/ospf6_nssa.c
View File

@ -1092,7 +1092,25 @@ static void ospf6_check_and_originate_type7_lsa(struct ospf6_area *area)
ospf6_nssa_lsa_originate(aggr->route, area, true);
}
}
}
static void ospf6_ase_lsa_refresh(struct ospf6 *o)
{
struct ospf6_lsa *old;
for (struct ospf6_route *route = ospf6_route_head(o->external_table);
route; route = ospf6_route_next(route)) {
old = ospf6_lsdb_lookup(htons(OSPF6_LSTYPE_AS_EXTERNAL),
route->path.origin.id, o->router_id,
o->lsdb);
if (old) {
THREAD_OFF(old->refresh);
thread_add_event(master, ospf6_lsa_refresh, old, 0,
&old->refresh);
} else {
ospf6_as_external_lsa_originate(route, o);
}
}
}
void ospf6_area_nssa_update(struct ospf6_area *area)
@ -1136,6 +1154,36 @@ void ospf6_area_nssa_update(struct ospf6_area *area)
if (IS_OSPF6_DEBUG_NSSA)
zlog_debug("Normal area %s", area->name);
ospf6_nssa_flush_area(area);
/* Check if router is ABR */
if (ospf6_check_and_set_router_abr(area->ospf6)) {
if (IS_OSPF6_DEBUG_NSSA)
zlog_debug("Router is ABR area %s", area->name);
ospf6_schedule_abr_task(area->ospf6);
ospf6_ase_lsa_refresh(area->ospf6);
} else {
uint16_t type;
struct ospf6_lsa *lsa = NULL;
/*
* Refresh all type-5 LSAs so they get installed
* in the converted ares
*/
if (IS_OSPF6_DEBUG_NSSA)
zlog_debug("Refresh type-5 LSAs, area %s",
area->name);
type = htons(OSPF6_LSTYPE_AS_EXTERNAL);
for (ALL_LSDB_TYPED_ADVRTR(area->ospf6->lsdb, type,
area->ospf6->router_id,
lsa)) {
if (IS_OSPF6_DEBUG_NSSA)
ospf6_lsa_header_print(lsa);
THREAD_OFF(lsa->refresh);
thread_add_event(master, ospf6_lsa_refresh, lsa,
0, &lsa->refresh);
}
}
}
}