19 May
2000
19 May
'00
2:53 p.m.
This is actually very common in "off-brand" (ie. anything besides Linux, *BSD, and Solaris) IP stacks. The current shipping versions of many OSes do some very odd things: cache a static route upon performing PMTUD, cache static routes to one of multiple default gateways, refuse to honor gratuitous ARPs, refuse to time out ARP entries, cache ARP entries with mcast MACs, cache ICMP redirects classfully, etc.
What's worse is these "caches" tend to be permanent, usually not even allowing manual overrides (other than a reboot).
Yah, BSDI added this to version 3 and I bought the source license just so I could hack it out, it really broke things on a box running any kind of routeing protocol. Regards, Neil.