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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!hobbes.ksu.ksu.edu!bav
- From: bav@hobbes.ksu.ksu.edu (Brick Verser)
- Newsgroups: comp.dcom.sys.cisco
- Subject: Re: AGS+ pauses for 800ms every 30 seconds
- Date: 7 Sep 1992 10:32:13 GMT
- Organization: Kansas State University
- Lines: 24
- Distribution: world
- Message-ID: <18fb3dINNrre@moe.ksu.ksu.edu>
- References: <184ee4INNimp@moe.ksu.ksu.edu>
- NNTP-Posting-Host: hobbes.ksu.ksu.edu
-
- bav@hobbes.ksu.ksu.edu (Brick Verser) writes:
- >We've got an AGS+ running Version 8.2(7) which seems to pause every 30
- >seconds. Seems likely this is RIP updates, but it seems unlikely that
- >the router should do absolutely nothing else for that period. Is there
- >a simple configuration change that we've overlooked which will make this
- >all better?
-
- I had a pleasant exchange with a very helpful Cisco person and we did a
- little digging. Basically, the Ciscos sometimes do this. If there
- are lots of of routes and large numbers of interfaces to which the routes
- must be broadcast, then it can take a while to update things after a
- new RIP update comes along. We have 24 Ethernet ports in this router
- and were receiving over 300 nets in the RIP updates. That does indeed
- cause the router to be busy for a while. And it seems that we've been
- suffering from some wild route flapping; in 5 weeks of uptime there have
- been over 50,000 routing updates--that's over one a minute and explains
- why this was happening so regularly.
-
- So it is a known problem with no immediate direct solution. Our
- solution is simple and pleasant; turn off advertising all these
- routes. We don't need 'em known, and I had been thinking about
- turning them off anyway just to reduce overhead. So I'm happy now.
-
- --Brick
-