[Openswan Users] Re: XFRM_STATE_NOPMTUDISC, was : MTU/DF problem with 2.6

[Herbert Xu]

On Thu, Feb 16, 2006 at 12:06:38PM +0100, Beschorner Daniel wrote:
> 
> Btw, could you give me a clue about the benefits of pmtud of this esp
> packets?

Obviously the benefit is only there when it works :) It does work for
me though.

> Neither the esp layer seems to honour it and keeps sending with its origin
> mtu (interface mtu - esp overhead) nor the original sender ever gets
> propagated a lower mtu (I assume because it is tricky to return the original
> packet header needed for the dest unreachable msg).
> At least at 2.6.15 only a message ("pmtu discovery on SA ESP...") is thrown
> by the kernel.

Please show me the packet dump of this under 2.6.15.  If this is on a
router then please show two separate dumps one for each side.

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt