diff options
| author | Acee Lindem <acee@lindem.com> | 2024-09-11 16:41:41 +0000 |
|---|---|---|
| committer | Acee Lindem <acee@lindem.com> | 2024-09-12 16:14:52 +0000 |
| commit | d1e8903a37b3a661362c5da068261848663b2dc5 (patch) | |
| tree | 1e7e2f94e7d2b242f89cdc5299d096c73230800e /ospfd | |
| parent | 571cca28c3eab4f201bad36762f5f90d55a4ba42 (diff) | |
ospfd: An OSPF Ack should be sent when P2MP reflooding is delayed.
When "ip ospf network point-to-multipoint delayed-reflooding" is configured,
LSAs received on an OSPF P2MP network are not reflooded. Since LSA reflooding
would normally serve as an implied LSA acknowledgment, an explicit OSPF ack
should be sent to avoid retransmission by the neighbor which orginally flooded
the LSA on the P2MP network.
Signed-off-by: Acee Lindem <acee@lindem.com>
Diffstat (limited to 'ospfd')
| -rw-r--r-- | ospfd/ospf_flood.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/ospfd/ospf_flood.c b/ospfd/ospf_flood.c index 40a76a0a34..e3398af74b 100644 --- a/ospfd/ospf_flood.c +++ b/ospfd/ospf_flood.c @@ -797,7 +797,7 @@ int ospf_flood_through_interface(struct ospf_interface *oi, ospf_ls_upd_send_lsa(nbr, lsa, OSPF_SEND_PACKET_DIRECT); } - } else + } else { /* If P2MP delayed reflooding is configured and the LSA was received from a neighbor on the P2MP interface, do not flood if back out on the interface. The LSA will be retransmitted @@ -815,9 +815,17 @@ int ospf_flood_through_interface(struct ospf_interface *oi, inbr ? &(inbr->router_id) : &(oi->ospf->router_id), IF_NAME(oi)); - } else - ospf_ls_upd_send_lsa(oi->nbr_self, lsa, - OSPF_SEND_PACKET_INDIRECT); + /* + * If reflooding is delayed, a delayed acknowledge + * should be sent since the LSA will not be immediately + * reflooded and interpreted as an implied + * acknowledgment by the sender. + */ + return 1; + } + ospf_ls_upd_send_lsa(oi->nbr_self, lsa, + OSPF_SEND_PACKET_INDIRECT); + } return 0; } |