woods@ncar.UCAR.EDU (Greg Woods) (03/22/91)
We just subnetted a part of our network with a Cisco AGS+ router. The router has two 6-port Ethernet cards in it but only one is being used. The other hosts on our network are using class B netmasks and we are relying on proxy arp to allow the physically separated subnets to communicate with each other. This means that each interface has multiple IP addresses and multiple ip routes (the router of course has to have a 255.255.255.0 netmask to implement this properly). The question I have is, about 3 times over the last three weeks, the router just hangs. It won't answer pings, it won't forward packets, and even the console port will not respond. Unfortunately we have our console port wired to a port selector device so if any error messages are printed on the console we don't get to see them. Has anyone seen similar behavior or have any idea what might be going on? Are there in fact any helpful error messages that might be printed when the router "crashes" like this? (I could temporarily hook up a terminal to the console port if I had to; it would be kind of a pain so I don't want to do it unless there is reason to believe some helpful information could be gained by doing so) The router always comes back to normal operation if it is powered off and on. --Greg NSFnet backbone | ---------- | NSS | ---------- | |--other AS's routers | ---------- | AGS |--- USAN net |router | ---------- Ethernet backbone | =============================================================================== | | ---------- ------------- | bridge | | AGS+ |<----this one keeps crashing ---------- | router | | | | ------------- / | \ serial lines Ethernet subnets to offsite Ethernets
CCV::GAGLIARDI@FALCON.NERSC.GOV (Jim Gagliardi - ESnet) (03/26/91)
Greg, We haven't seen this problem with our AGS+s, but there is a cisco Field Notice for a modification of AGS+ power supply wiring harness. One symptons is: "The system randomly reloads or shuts down during operation." Now this is for AGS+ that were shipped prior to Jan. 21, 1991. The notice is dated Feb. 7, 1991...#PS-00020020791 78-0764 Hope this helps, Jim Gagliardi gagliardi@es.net (415) 422-4292