Udp Packets drop by kernel
I have a customer there had some UDP packets loose. I found this 4 following triggers:
• SLES 11 with SP2.
• Alias IP configured on an interface.
• IP traffic send as UDP without any checksum in the header to the alias IP address.
• No route to the source IP address.
If all 4 triggers where true, the IP packet will be drop by the kernel.
I could reproduced it with netcat.
The fix where to make a route to the source IP address.
Does anyone have any explantion on this behavior ?
SLES 10 SP2 don´t behavior like SLES 11 SP2. SLES 10 SP just forward the packets as expected.
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