Die proxy arp die. (and that's not German). I've had a job or consulting gig or two that has inadvertently had this as the hidden glue making things work. (wha, you can't route that subnet out an Ethernet interface without a next hop? It's always worked....) I fight with sysadmins to this day about the concept of a broadcast domain and subnet... If I hear another case of someone saying that switch is the "80" subnet when there are 3 co-existing /24s in that domain I may go crazy.... I've cleaned up a lot of poor host and network management and it's amazing how much a difference the hardware operates without the hacks. Jared Mauch On Jul 6, 2012, at 8:51 PM, Ben Aitchison <ben@meh.net.nz> wrote:
Routing loops, incorrect subnet masks. (like when people stick a /24 netmask on a /27 then can't reach another adjacent /27)