[mrtg] Re: bandwidth statements on Cisco
cmeena at hotmail.com
Wed Sep 29 22:54:16 MEST 1999
I tested it on a Cisco router yesterday. When I first brought up
a serial interface on a router, it defaulted to 1.544Mb. Then I used a
bandwidth statement to set it to 256K, and then I did a snmpwalk on ifSpeed
and it showed the 256k. So, I am positive that the
ifSpeed value gets populated with the bandwidth statement. Otherwise,
for a serial interface it defaults to T1.
>From: Brantley Jones <bjones at centurytel.net>
>To: "Shawn Barnhart" <swb at mercury.campbell-mithun.com>, "Meena
>Chockalingam" <cmeena at hotmail.com>
>CC: "mrtg list" <mrtg at list.ee.ethz.ch>
>Subject: Re: [mrtg] Re: bandwidth statements on Cisco
>Date: Tue, 28 Sep 1999 17:24:41 -0500
>At 02:37 PM 9/28/99 -0500, Shawn Barnhart wrote:
> >| Cisco allows bandwidth statements to set the correct clocking speed on
> >| serial interfaces. Does this affect the ifSpeed variable?
> >| If it does not, how does the ifSpeed variable get populated with a
> >My Cisco command reference for 11.3 says that the bandwidth command is a
> >reference for higher level protocols. It doesn't say *which* higher level
> >protocols, but I have a distant memory of a Cisco instructor telling us
> >eigrp uses it in route path computation. I don't think it does anything
> >serial interface clocking, the interface command "clock" does this.
> >You have to use it to populate ifSpeed.
>The bandwidth command is ONLY used for route-path determination by higher
>level ROUTING protocols, such as OSPF and EIGRP. You can take it out if
>you like...I don't think ifspeed will be populated without it, though.
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