Document that equal-cost multipath routing with caching does not work
for forwarded packets.
Signed-Off-By: Tore Anderson <[EMAIL PROTECTED]>
---
* Jarek Poplawski
It is probably one of the most often asked questions
on the LARTC, so I'd suggest to look at its archives.
[...]
Multipath with caching doesn't work with forwarding.
Well, I did look at LARTC's archives (and again after reading your
mail), still couldn't find anything. Sorry for bothering you, though.
When I disabled the support it worked just fine (no need for iptables
CONNMARK trickery or any of Julian's patches), so thanks for your help!
Anyway, it strikes me as a bit odd that this feature is found under
CONFIG_IP_ADVANCED_ROUTER when it doesn't work for routers. That
could at least be better documented - here's a patch to do just that.
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -124,6 +124,10 @@ config IP_ROUTE_MULTIPATH_CACHED
routing cache. If you say Y here, alternative routes are cached
and on cache lookup a route is chosen in a configurable fashion.
+ Be warned that this feature does not work for forwarded packets,
+ and that enabling it will break equal cost multipath routing for
+ forwarded traffic.
+
If unsure, say N.
config IP_ROUTE_MULTIPATH_RR
-
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