[c-nsp] ETH spikes

[Darryl Dunkin]

Did anyone reset the counters on the router interface or reboot it? If
so, MRTG/rrdtool will assume the counter wrapped back to zero and assume
bytes were transferred up to the 32-bit barrier or up to the maximum
speed of the interface (32-bits assuming SNMPv1 and MaxBytes is set in
the MRTG config). You can get about 125Mbps off of SNMPv1/32-bit
counters at 5 minute intervals, so a true wrap is unlikely.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Dracul
Sent: Monday, April 21, 2008 03:46
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] ETH spikes

Hi All,

Anybody experienced sudden big spikes with their eth interfaces in their
routers? WAN bandwidth is just 2MB but suddenly the MRTG graphs
registered a 100MB bandwidth on the eth0 going to the Proxy server.
although
on the proxy server eth1 (going to customer network) everything is
normal.

network fluke or something?

regards,
chris
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