Hello, We're using MRTG to watch a 26 port Cisco switch. It has 24 100mb ports, and 2 1000mb ports. Basically the 100mb ports are connected to Unix servers, and the 1000mb ports are uplinks connected to our backup media servers (for tape backup). So each night our servers back themselves up by sending data to the uplink port (where the media server is)
The MRTG configs look right. It detected the 24 ports as 12.5MB/s and the uplinks as 125MB/s. When we fire off our backups at midnight, we see lots of ports max out (95% utilization or about 11MB/s). They all are sending data to our uplink port (media server). But what's odd is the gigabit uplink port only shows 10% utilization (11MB/s). Since we have multiple ports sending data at exactly the same time (midnight) and MRTG accurately reflects this, we expected to see an aggregate bandwidth to the uplink of about 40MB/s. If you look at the graphs and add up the various servers sending 11MB/s in, how can the uplink also only be doing 11MB/s out. Sorry if that's a little confusion, wasn't sure how to explain it. Thanks, Shane -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
