I'm using Slackware 10.1 and I get the following problem after recompiling the kernel. I compiled kernel version 2.6.13 with all the needed modules in it. But now when I try to use fwmark with iproute2 it doesn't work. When I try to add a rule like:
ip rule add fwmark 5 lookup 251
Then I list the rules and fwmark doesn't come up anywhere. And of course it doesn't work at all.
I tried to compile my own iproute2 package for that kernel, but the problem still exists. I thought it may be something with the kernel and compiled the same kernel on Slackware 10.2, and fwmark worked great. I compiled the same version of iproute2 that is on Slackware 10.2, but it didn't help.
Any ideas about getting it work except changing to Slackware 10.2.