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. It also happened last night when I installed a Cisco Catalyst 2924XL (replacing an old 10BaseT hub, finally!) which didn't involve rebooting the Ciscos, but involved having them unreachable for a minute or two as cables were switched and Spanning Tree did its thing... I have another ARC with no modems on the same LAN (for testing) and it initially did the same thing, but now I'm having trouble reproducing it. When it was screwed up one night, it fixed itself overnight, but it obviously took hours to do, which kinda defeats the purpose of OSPF. I know this is really vague, but problem is, I don't really know where to start looking for this, because I didn't document very well what my current OSPF settings are. (A bulk-config-to-ASCII utility would be REALLY HELPFUL HERE :) I could reverse-engineer HARM and try to get a dump of that part of the config via SNMP somehow, I guess, but... yuck. Anyway, I'm also not a real in-depth OSPF guru yet. 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. A quick look at some of the 'show' screens -- this is with the card actually routing correctly:
show ospf global
GLOBAL OSPF SETTINGS Router ID: 206.240.130.12 Administrative Status: ENABLED OSPF Version Number: 2 Area Border Router Status: DISABLED Autonomous System Border Router Status: ENABLED Type-of-service (TOS) Support: OFF External LSDB Limit: -1 Multicast Extensions Support: OFF Exit Overflow Interval: 0 Router's Support for OSPF Demand Routing: OFF OSPF Traps: DISABLED
show ospf area 0.0.0.0
OSPF AREA SETTINGS Area ID: 0.0.0.0 OSPF Area Type: TRANSIT Area Status: ENABLED
list ospf recei
OSPF Receive Policies: Address/Mask Action Routing Preference 199.077.100.000/23 Accept Pref1 206.240.130.000/23 Accept Pref1 208.006.168.000/22 Accept Pref1
list ospf send
OSPF Send Policies: Source Address/Mask Action LOCAL 199.077.100.000/23 Advertise LOCAL 206.240.130.000/23 Advertise LOCAL 208.006.168.000/22 Advertise
list ospf int OSPF INTERFACE TABLE IfIpAddr/IfInd AreaId IfType AdminStat IfState Metric 206.240.130.12 0.0.0.0 BC ENABLED OtherDsgRtr 10
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.