[OpenAFS] Re: mtu problem

Carson Gaspar carson@taltos.org
Thu, 07 Feb 2013 09:04:10 -0800

On 2/7/13 8:36 AM, Antony Mayi wrote:

> modern tcp/ip stack is setting Don'tFragment flag by default so
> oversized packets are always dropped (relevant ICMP should be sent
> back for PMTU discovery to kick in though which is not happening in
> my case).
> yes, I meant adjusting client interface MTU. I already tried the
> -rxmaxmtu without any success.

Your network is broken. You can choose to re-configure your server to 
support the broken network (lower MTU, disable PMTU, ...), or choose to 
not support clients on broken networks. There is no magic bullet to 
solve broken packet black holes.