There's no reason not to use regular expressions for ALL of the troubleshooting steps you mentioned:
#1 HOSTNAME#show ip ospf | i Area|execute Area BACKBONE(0) Area has no authentication SPF algorithm executed 21 times Area ranges are HOSTNAME# #2 HOSTNAME#show processes cpu | i OSPF Hello 2 165116 1340327 123 0.00% 0.00% 0.00% 0 OSPF Hello HOSTNAME# ----- Original Message ----- From: "Kelly Cobean" To: Sent: 21 June 2002 7:34 pm Subject: RE: OSPF, when is it time for more than area 0 (try 2) [7:47165] > Here are some commands you can run, and their significance in determining > whether your OSPF Area 0 routers are working too hard or not: > > #show ip ospf: > Look for: > "SPF algorithm executed xxx times" - I don't know what constitutes a > high number, but if it's in the hundreds or thousands after a relatively > short period of time, that means that instabilities in your network are > causing the routers to frequently run the Dijkstra (SPF) algorithm, which is > a very processor intensive process. > > #show processes cpu: > Look for: > "OSPF Hello" - Again, I'm not sure what "high" is, but one of our > routers that has 1 Broadcast interface, and 13 Point-to-point interfaces > holds steady at 0.06% processor utilization. Anyone care to chime in on > what a high number for this process would be? > "OSPF Router" - This is the one that will spike during SPF > calculation, so watch the 5 minute utilization here, if you see it > consistently high, that probably means it's time to move to multi-area OSPF > > #show processes memory | include OSPF: (the "| include OSPF" just helps > minimize the junk) > Look for: > OSPF Hello & OSPF Router - Not real sure about OSPF Hello, but I believe the > memory counter for OSPF router indicates the size of your databases. If you > find these growing large enough to start running the router out of memory, > it's time to move to multi-area OSPF (again, I don't know what size of > network it would take to do this, sorry. Any takers on that one?) > > > The number of SPF calculations and CPU utilization are the two big ones to > watch our for (and are directly linked to one another) If you see lots of > re-calc's and they are holding your processor hostage, then you should start > thinking about redesign. > > > HTH, > Kelly Cobean > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > bergenpeak > Sent: Friday, June 21, 2002 8:09 AM > To: [EMAIL PROTECTED] > Subject: OSPF, when is it time for more than area 0 (try 2) [7:47129] > > > I've got a rather large OSPF area 0 network with no non-zero > areas. This network will continue to grow both in number of > network elements and number of subnets on these routers. > > What commands, and specifically, what information provided by > these commands, will give me insight as to whether these routers > are nearing the point, from a routing perspective, that its time > to segement the network in some fashion? > > Thanks Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47202&t=47202 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]