[mrtg] Catalyst 2900, pulls blatently wrong data

Steve Creel screel at nothinbut.net
Wed Sep 13 23:00:36 MEST 2000

I've got a Cisco Catalyst 2900 switch, and a few ports on it fail to show
any traffic that is actually moving through the ports.  It will constantly
show 280 bits/second (actually fluxes from 280 to like 279, but
anyway...).  I did a "clear counters" for that interface on the switch,
and presto - traffic shows up properly.  Then, like 6 minutes later or
something [mrtg runs on 2 min. intervals], it stopped again.  I did a
clear counters again, boom, there it goes, and then reverts back to
280bits/sec...  The Catalyst shows proper information when you do a show
int [or atleast as far as I can tell].  Anyone have any ideas?  All of the
devices on this unit do the same thing.

This particular catalyst's ports listed at:

Graph is at http://sql.nothinbut.net/mrtg/

Config excerpt:
Target[]: 18:S7ran0sT at
MaxBytes[]: 1250000
Title[]: mtl-2924xl-2.nothinbut.net (): FastEthernet0/17
PageTop[]: <H1>Traffic Analysis for FastEthernet0/17
 [other info text excluded]

Steve Creel                           Nothin But Net, LLC.
                                      screel at nothinbut.net

"Always do right.  This will gratify some people and 
astonish the rest."
		-- Mark Twain

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