In the last couple weeks, several inside users (including me) have lost Internet connectivity. In troubleshooting this on my own machine (Win2K Server), I did an arp -a and found that the MAC address for the Pix (the default gateway) was wrong. In the one instance where I dug deeper and found which MAC address it had listed, I found that the incorrect MAC address belonged to the Cisco 7200 router which is on the outside of the Pix 520 we have. Doing "arp -d 192.168.1.1" and then pinging the Pix's inside interface did the trick.
We have four HP 4000M switches and one HP 800T switch in our network. I made sure ABC was disabled on all of them (it was enabled on some but not others before this) and everything seemed OK for a couple days. I'd been moving some cables around on the switches when it first happened, so we figured that was the cause. After about a week, I enabled ABC on all the switches again. Everything was fine until today, when a couple of us couldn't get out. I disabled ABC on all the switches and deleted my arp entry for the inside interface, and that worked again.
I can't seem to find any information online that appears relevant to this. Anyone have any ideas?
Thanks!
Dan
We have four HP 4000M switches and one HP 800T switch in our network. I made sure ABC was disabled on all of them (it was enabled on some but not others before this) and everything seemed OK for a couple days. I'd been moving some cables around on the switches when it first happened, so we figured that was the cause. After about a week, I enabled ABC on all the switches again. Everything was fine until today, when a couple of us couldn't get out. I disabled ABC on all the switches and deleted my arp entry for the inside interface, and that worked again.
I can't seem to find any information online that appears relevant to this. Anyone have any ideas?
Thanks!
Dan