[mrtg] Re: Cisco Router IOS

Larry Rosenman ler at airmail.net
Wed May 15 18:33:02 MEST 2002

On Wed, 2002-05-15 at 11:32, Varosky, Geoff wrote:
> It is possible that if you were graphing just using the ifIndex number, that
> it could have changed. A router will usually do this after a reboot if new
> interfaces have been added. You may want to try using the --ifref=descr
> switch when running cfgmaker, and work off the interface name instead of the
> ifIndex #, that way, when you reboot, you'll still be able to graph fine.
> Hope this helps!
You can also use on recent IOS:
snmp-server ifindex persist

which will cause the IfIndex numbers to stay the same.

Larry Rosenman, Sr. Network Engineer, Internet America, Inc.
E-Mail: ler at airmail.net 
Phone: +1 214-861-2571, Fax: 214-861-2663
US Mail: 350 N. St. Paul, Suite 3000, Dallas, TX 75201

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