On Tue, 12 Oct 1999, Mike Wronski wrote:
|Mike Andrews writes... |>I've been having a really bizarre problem off and on the last week or two. |>Occasionally some of my ARCs will suddenly stop doing OSPF right. The |>routing table loses all OSPF routes, and the ARC stops announcing its |>routes via OSPF to our Ciscos. Disabling/enabling OSPF doesn't help, but |>most of the time (not all the time) rebooting the ARC will. |> |>One thing that seemed to trigger it was rebooting some of our Ciscos... |>and since that happens so infrequently (not rebooted since going to ARC |>4.2 in fact) it's hard to track down. I don't know which one exactly, |>maybe our AS border router dying is what threw it off. |> |> . . . |> |>Has anyone seen anything like this before or know of any particular |>settings that I might want to check? This is driving me nuts (not to |>mention my customers) and I'm not sure where to start. | |Make sure your tc's aren't becoming the DR. To check, do a "list ospf nei", |see if any of them are in any state other than "two way". To fix, do a |"set ospf interface THE_OSPF_INTERFACE router_priority 0" on each of |them and reboot. |
That recomendation is actually in the release notes for 4.2.32...
OK, that's three votes for DR/BDR designation being the problem. :) And dumb me for not paying closer attention to the release notes. Basically I had left every single router in my network set to the default of priority 0. I've just set my border Cisco to 50, the next fastest Cisco to 40, all the 2500's to 20, and left the TC's and two FreeBSD machines running gated set to 0. I rebooted what was the DR at the time (I know, coulda just disabled/reenabled OSPF, but the customers on it didn't notice) and didn't have any problems with the TC's. We'll see... Mike Andrews (MA12) * mandrews@dcr.net * http://www.bit0.com/ VP, sysadmin, & network guy, Digital Crescent Inc, Frankfort KY Internet services for Frankfort, Lawrenceburg, Owenton, & Shelbyville "With sufficient thrust, pigs fly just fine." -- RFC 1925 - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.