nanog mailing list archives

Re: Dampening on Juniper routers


From: john heasley <heas () shrubbery net>
Date: Sun, 10 Dec 2000 01:34:47 +0000


On Sat, Dec 09, 2000 at 06:32:32PM -0500, John Fraizer darkened my spool with the following:


Can anyone relate any information with regards to how Juniper routers
differ from Cisco in respect to BGP dampening?

We are seeing issues with one of our peers who is using an M20.  If the
BGP session is cycled, that peer is damping our routes for aprox 1hr.  We
don't have this problem with any other peers, all of whom are using Cisco
products.

there once was a bug where junos penalized flaps twice, once at withdraw
time and once at re-advertize time.  you can compensate by doubling
your/the default params.


There has to be some huge difference in the way that the Juniper is
calculating the penalty and decay.

Any help is greatly appreciated.

---
John Fraizer
EnterZone, Inc





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