I am wondering if I could get some feedback on a utility that can be used to monitor collisions (source of problem) on the switches in my cluster. Current setup: 8 x 3548's -> 1 x 3550 in a star config. There seems to be alot of latency at times. I have MRTG running against the 3550, but I need to get to the root of the problem. Any help would be appreciated. Thx in advance.
The only time you should see collisions is in a half duplex environment. Full duplex ethernet will run virtually error free. Do a show interface to make sure all of your uplinks are running at full duplex on both ends of the link.
I followed the link to the mib's @ somix, and selected the appropriate file. Can i copy the code straight out of the file and past it into the *.cfg file for mrtg? Or do I have to make more changes? Sry if this is a noobish question.
That is a strange graph from MRTG. Are you sure that MRTG is still updating? The only time I have seen MRTG draw a graph like that is when it stops updating. The reason for this is when MRTG can no longer collect data it just keeps using the last successful measurement and you end up with a never changing graph like you have.
Ports blinking amber usually indicate errors. If you do a show interface command every couple of minutes do you see the error cuonters incrementing? If not then you might have failing hardware or heavy traffic in a half duplex environment. If you set the port speeds and duplex you must match the settings on all attached hosts. Hosts that are not set will match speed but end up at half duplex resulting in collisions.
The MRTG/MIB stuff from the URL I supplied sometimes works - sometimes not. If it doesn't work it is the MIB portion that is ususally incorrect.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...