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| author | Renato Westphal <renato@opensourcerouting.org> | 2021-07-02 18:01:32 +0200 |
|---|---|---|
| committer | Renato Westphal <renato@opensourcerouting.org> | 2021-09-16 17:26:48 +0200 |
| commit | 711650980337fad6f70fd1e3bc17bf21428b7a62 (patch) | |
| tree | 0440d27c923db83330c8135337b130104c44bc6a /ospf6d/ospf6d.c | |
| parent | ospf6d: add missing entry to array of strings (diff) | |
| download | frr-711650980337fad6f70fd1e3bc17bf21428b7a62.tar.xz frr-711650980337fad6f70fd1e3bc17bf21428b7a62.zip | |
ospf6d: introduce support for Graceful Restart (restarting mode)
RFC 5187 specifies the Graceful Restart enhancement to the OSPFv3
routing protocol. This commit implements support for the GR
restarting mode.
Here's a quick summary of how the GR restarting mode works:
* GR can be enabled on a per-instance basis using the `graceful-restart
[grace-period (1-1800)]` command;
* To perform a graceful shutdown, the `graceful-restart prepare ipv6
ospf` EXEC-level command needs to be issued before restarting the
ospf6d daemon (there's no specific requirement on how the daemon
should be restarted);
* `graceful-restart prepare ospf` will initiate the graceful restart
for all GR-enabled instances by taking the following actions:
o Flooding Grace-LSAs over all interfaces
o Freezing the OSPF routes in the RIB
o Saving the end of the grace period in non-volatile memory (a JSON
file stored in `$frr_statedir`)
* Once ospf6d is started again, it will follow the procedures
described in RFC 3623 until it detects it's time to exit the graceful
restart (either successfully or unsuccessfully).
Testing done:
* New topotest featuring a multi-area OSPF topology (including stub
and NSSA areas);
* Successful interop tests against IOS-XR routers acting as helpers.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Diffstat (limited to 'ospf6d/ospf6d.c')
| -rw-r--r-- | ospf6d/ospf6d.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ospf6d/ospf6d.c b/ospf6d/ospf6d.c index e85f4c1b6..2c8c9b9d4 100644 --- a/ospf6d/ospf6d.c +++ b/ospf6d/ospf6d.c @@ -1383,6 +1383,7 @@ void ospf6_init(struct thread_master *master) ospf6_intra_init(); ospf6_asbr_init(); ospf6_abr_init(); + ospf6_gr_init(); ospf6_gr_helper_config_init(); /* initialize hooks for modifying filter rules */ |