RE: [SQU] More on WCCP and truncated GRE packets. --HELP

At 03:47 PM 12/13/00 -0800, Lincoln Dale wrote:
>Nathan,
>
>At 05:34 PM 13/12/2000 -0600, Nathan Lewis wrote:
>>At 02:43 PM 12/13/00 -0800, Lincoln Dale wrote:
>>>yes, you could just increase the MTU on the cisco router to something
>>>larger than 1500.
>>>but remember that the MTU is at 1500 for a _reason_.
>>
>>Crap. See output below:
>>
>> >config t
>> >interface Ethernet0/0
>> >mtu 1524
>
>nice of you to cut-and-paste my email selectively.
>to repeat what i said in the next sentence:
> it all has to do with what the "standard" for ethernet allows.

I didn't mean to cut you short. But I also realize that what an RFC says
and what can actually be done are sometimes two different things. Please
realize that I'm not trying to develop this stuff, just implement it as
described in the FAQ and elsewhere. I also know that this problem has
blown over my head, and although I've invested quite a lot of time into
trying to make it work, I can see that it probably won't.

The page describing this problem over tunneling on the Cisco site described
raising the MTU - that's the only reason I wanted to try it.

Forgive me, but I'm not familiar enough with MTU, MSS, or the 3-way TCP
handshake to figure out a simple solution to this. Does one exist?

Would the other GRE module, the one included with Linux (patched for this
purpose) work better?

However, I'm having trouble understanding why my situation is unique - how
could other people have gotten this to work using such a similar setup?

Nathan Lewis

Senior Network Administrator
nathan_lewis@uclid.com

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