Patrick McHardy wrote: > Marco Berizzi wrote: > > Hello everybody. > > I have just upgraded from 2.6.21.3 to > > 2.6.22-rc4 and I get a ton of > > pmtu discovery on sa esp/blablab/blabla > > messages (this box is running openswan). > > Is this an expected behaviour? > > > We have some MTU opimiztations in 2.6.22-rc that might be related. > Please check with tcpdump what exactly is happening and whether > the 2.6.22-rc box is sending too large packets.
Sorry for the late response. I have done a tcpdump capture on the external interface but I don't see anything strange. (I can send to you the capture if you want/need) I have noticed that the mtu on the aes tunnels now is equal to 1450 byte (with 2.6.21 it was 1428). Let me explain: linux 2.6.22-rc4 ->>-AES tunnel ->>- linux 2.6.21 mtu=1450 linux 2.6.21 ->>-AES tunnel ->>- linux 2.6.22-rc4 mtu=1428 Now as a collateral effects all the windoze boxes aren't able to exchange large packets: I must upgrade all ipsec gateway to 2.6.22-rc4 (or downgrade this box to 2.6.21 again). Hints? - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
