diff options
| author | Fredi Raspall <fredi@voltanet.io> | 2021-04-23 18:33:43 +0200 |
|---|---|---|
| committer | Fredi Raspall <fredi@voltanet.io> | 2021-05-03 17:27:37 +0200 |
| commit | ce4eccfa800fccb461ac99ec3b6f12ba190c185d (patch) | |
| tree | ae1e115b4d221e5f86cc1339328981759fb74c02 /isisd/isis_lfa.c | |
| parent | f71e1ff6a98d0e244c7da11d870d14e31b517811 (diff) | |
isisd: link protection optional fallback in ti-lfa
The current implementation of TI-LFA computes link-protecting
repair paths (even when node protection is enabled) to have repair
paths to all destinations when no node-protecting repair has been
found. This may be desired or not. E.g. the link-protecting paths
may use the protected node and be, therefore, useless if the node
fails. Also, computing link-protecting repairs incurs extra
calculations.
With this patch, when node protection is enabled, link protecting
repair paths are only computed if "link-fallback" is specified in
the configuration, on a per interface and IS-IS level.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Diffstat (limited to 'isisd/isis_lfa.c')
| -rw-r--r-- | isisd/isis_lfa.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/isisd/isis_lfa.c b/isisd/isis_lfa.c index b535924e93..e033c28fef 100644 --- a/isisd/isis_lfa.c +++ b/isisd/isis_lfa.c @@ -2258,6 +2258,11 @@ static void isis_spf_run_tilfa(struct isis_area *area, spftree_pc_node = isis_tilfa_compute(area, spftree, spftree_reverse, resource); isis_spftree_del(spftree_pc_node); + + /* don't do link protection unless link-fallback is configured + */ + if (!circuit->tilfa_link_fallback[spftree->level - 1]) + return; } /* Compute link protecting repair paths. */ |