[c-nsp] mtu size GRE tunnel

[Pete S.]

try:

ip tcp adjust-mss 1400

on your tunnel interface. It'll save you from updating all your hosts.

On 5/25/07, Stefan Hegger <Stefan.Hegger at lycos-europe.com> wrote:
> Hi,
>
> hope you can help me to solve my problem. We are running some GSR's (cisco
> 12008/GRP) with IOS Version 12.0(26)S6. We opened a GRE tunnel to another
> location and have problems with the MTU size.
>
> It seems that the GSR's does not  return an ICMP message
> indicating "fragmentation needed".
>
> When we decrease the MTU to 1400 on host, everything works fine.
>
> Best Stefan
> --
> Stefan Hegger
> Internet System Engineer
>
> Lycos Europe GmbH
> Carl-Bertelsmann Str. 29
> Postfach 315
> 33312 Gütersloh
>
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>
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