diff options
| author | Renato Westphal <renato@opensourcerouting.org> | 2023-03-03 13:09:20 -0300 |
|---|---|---|
| committer | Renato Westphal <renato@opensourcerouting.org> | 2023-05-08 21:47:44 -0300 |
| commit | 0c05ceae008182616af113cb97005801532c3988 (patch) | |
| tree | d97c1469064c84386b596733de2573abb6f41f43 /ospf6d/ospf6_gr.c | |
| parent | d8cf2fc52fbcd3f4ada3931574b54f197d59b520 (diff) | |
ospfd, ospf6d: introduce the "graceful-restart hello-delay" command
This command makes unplanned GR more reliable by manipulating the
sending of Grace-LSAs and Hello packets for a certain amount of time,
increasing the chance that the neighboring routers are aware of
the ongoing graceful restart before resuming normal OSPF operation.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Diffstat (limited to 'ospf6d/ospf6_gr.c')
| -rw-r--r-- | ospf6d/ospf6_gr.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/ospf6d/ospf6_gr.c b/ospf6d/ospf6_gr.c index 18f36abda0..3d5d4d259f 100644 --- a/ospf6d/ospf6_gr.c +++ b/ospf6d/ospf6_gr.c @@ -190,6 +190,14 @@ static void ospf6_gr_restart_exit(struct ospf6 *ospf6, const char *reason) OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB(area); for (ALL_LIST_ELEMENTS_RO(area->if_list, anode, oi)) { + /* Disable hello delay. */ + if (oi->gr.hello_delay.t_grace_send) { + oi->gr.hello_delay.elapsed_seconds = 0; + EVENT_OFF(oi->gr.hello_delay.t_grace_send); + event_add_event(master, ospf6_hello_send, oi, 0, + &oi->thread_send_hello); + } + /* Reoriginate Link-LSA. */ if (oi->type != OSPF_IFTYPE_VIRTUALLINK) OSPF6_LINK_LSA_EXECUTE(oi); @@ -520,6 +528,21 @@ static void ospf6_gr_grace_period_expired(struct event *thread) ospf6_gr_restart_exit(ospf6, "grace period has expired"); } +/* Send extra Grace-LSA out the interface (unplanned outages only). */ +void ospf6_gr_iface_send_grace_lsa(struct event *thread) +{ + struct ospf6_interface *oi = EVENT_ARG(thread); + + ospf6_gr_lsa_originate(oi, oi->area->ospf6->gr_info.reason); + + if (++oi->gr.hello_delay.elapsed_seconds < oi->gr.hello_delay.interval) + event_add_timer(master, ospf6_gr_iface_send_grace_lsa, oi, 1, + &oi->gr.hello_delay.t_grace_send); + else + event_add_event(master, ospf6_hello_send, oi, 0, + &oi->thread_send_hello); +} + /* * Record in non-volatile memory that the given OSPF instance is attempting to * perform a graceful restart. @@ -677,6 +700,11 @@ void ospf6_gr_unplanned_start_interface(struct ospf6_interface *oi) /* Send Grace-LSA. */ ospf6_gr_lsa_originate(oi, oi->area->ospf6->gr_info.reason); + + /* Start GR hello-delay interval. */ + oi->gr.hello_delay.elapsed_seconds = 0; + event_add_timer(master, ospf6_gr_iface_send_grace_lsa, oi, 1, + &oi->gr.hello_delay.t_grace_send); } /* Prepare to start a Graceful Restart. */ |