Re: [squid-users] WCCP / no return traffic on gre interface

ons 2007-05-09 klockan 15:27 -0400 skrev Chad Harrelson:
> Wow. Thanks Henrik! This is the command that got it going:
> echo 0 >/proc/sys/net/ipv4/conf/gre1/rp_filter
>
> I thought for sure that I had run across documentation that told me to
> enable rp_filter. Oh, it's working now. Now on the WCCPv2....
>
> When I try enabling version 2 I get the following error while sniffing
> my external interface:
>
> 15:17:12.108896 IP 150.125.125.185 > 150.125.127.142: ICMP
> 150.125.125.185 protocol 47 port 34878 unreachable, length 84

Sounds like the local/remote endpoint of your GRE tunnel does not match
how the router encapsulates the intercepted traffic.

> (150.125.127.142 is the automatic router ID that is displayed under: sh ip wccp)

And is what you should use as router IP for WCCP (and GRE),.

Regards
Henrik