Messages in this thread | | | From | Andi Kleen <> | Subject | Re: Linux 2.2.7-ac1 Path MTU bug | Date | Wed, 5 May 1999 17:39:14 +0200 |
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In muc.lists.linux-kernel, you wrote: > >Hi, > >I think I have found a Path MTU Discovery bug in Linux-2.2.7-ac1. > >1. Linux sends a packet > PMTU >2. "ICMP Host Unreachable - need to frag" received >3. PMTU-sized packet is sent >4. data which comes after the packet from 1. is sent in PMTU-sized > packets. > >The problem is that the data remaining in the packet 1. which comes after >the PMTU length is never resent. So the TCP connection stalls at this point. >See the tcpdump example below (bytes 1510-1582 are not sent). > >Sometimes the PMTU mechanism does work OK. The bug is easily reproducable. >The problem is not Ultrix related: it happens with HP-UX & Linux too. >I did not try a normal (non -ac) 2.2.7 kernel.
I cannot reproduce it here. What compiler do you use?
-Andi
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