[mrtg] Re: Switch vs NIC info

[Michael Votaw]

What's probably happened is that the switch is reporting that value when you
changed to full duplex.  Normally, 12.5Mbytes/sec (100 Mbits) is standard
fast ethernet.  The switch has a little more intelligence and is reporting
200000000 for ifSpeed when set to full duplex.  Your server simply doesn't
change its speed rating in the ifSpeed OID.  It really doesn't matter
because MRTG will still pull the same number of bytes in and bytes out of
the interfaces.  In fact, when the server changes to 200 Mbits, just
remember that if the link is utilized to 50% one way, you've topped out its
capability in one direction and that is actuallly 100% in one direction.

> -----Original Message-----
> From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]On
> Behalf Of Elliott, Shawn
> Sent: Tuesday, April 18, 2000 4:29 PM
> To: 'mrtg at list.ee.ethz.ch'
> Subject: [mrtg] Switch vs NIC info
>
>
> We are using Fore ES-2810 switches and  Intel Pro 10/100 nic's in our Dell
> Netware 5 servers. When checking on the port speed on the 2810's it states
> that they are running at full dx at a rate of 25 MBytes/s, but if I check
> the server that is plugged into this port it is stating that it is only
> running at 12.5 MBytes/s. Both devices are forced to 100MB FDX.
> Why am I getting differnt readings and which one is correct?
>
>
> Thanks
> Shawn
>
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