>
> In theory the hack from TCP could be ported to UDP too, but I'm not sure if it is
> worth it for WCCP (to be honest I don't know what WCCP is so I cannot assess if
> it's important enough to add a workaround for it)
Andi, thanks a lot for the insight, I will try your suggestions.
WCCP is a Web Cache Communication Protocol; it is used by Cisco
routers to forward traffic to proxies. What is confusing is that
send() generates an ID for packets with DF set, at least when
used in a way like Squid uses it. I briefly checked Squid source
code and didn't find any places where it would disable MTU Path
discovery.
> > Sorry if I'm wrong but I think this is a kernel problem because
> > sendmsg() is a system call. On RH6.2 with 2.2.19 this doesn't happen,
>
> It's strictly not a bug because the RFCs don't require an IPID for !DF.
Ok, an intercompatibility issue. :-)
-- Best Regards Vladimir Ivaschenko Certified Linux Engineer (RHCE) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/