[rcarmo]

We once had an Ericsson MSC that only replied to _uneven_ ICMP packets due to some bug.

Made it look like there was 50% packet loss on an otherwise perfectly good Cat 5 cable...

(edit: ICMP instead of IP)

[elementai]

We've had a 3rd party router configured to balance traffic based on even/odd last octet. Add faulty hardware and DHCP to the mix, and here you have really hard to debug problem.

[TheLoneWolfling]

Checksum issue?

[rcarmo]

IIRC, there was nothing on the logs and they eventually shipped a fix. I was there when it happened and was called over to have a look.