From 48dbe48a99bf6be03db9b4fd1f6988aa2205f57e Mon Sep 17 00:00:00 2001 From: Donald Sharp Date: Sat, 7 Aug 2021 08:06:26 -0400 Subject: [PATCH] doc: Add documentation about use_oif_addrs_only Signed-off-by: Donald Sharp --- doc/user/zebra.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/doc/user/zebra.rst b/doc/user/zebra.rst index 5eb97ff06d..fcb1df612c 100644 --- a/doc/user/zebra.rst +++ b/doc/user/zebra.rst @@ -1353,6 +1353,15 @@ Optional sysctl settings When ndisc_notify is set to 0, no U-NA is sent. When ndisc_notify is set to 1, a U-NA is sent when the interface comes UP. +Useful sysctl settings +---------------------- + +.. option:: net.ipv6.conf.all.use_oif_addrs_only=1 + + When enabled, the candidate source addresses for destinations routed via this interface are + restricted to the set of addresses configured on this interface (RFC 6724 section 4). If + an operator has hundreds of IP addresses per interface this solves the latency problem. + Debugging =========