On Mon, 2003-04-14 at 10:22, Brenda Washington wrote: > I want to monitor virtual interface traffic on a Cisco router using > mrtg, but I'm not sure how to go about setting up my mrtg.cfg file to > see these virtual interfaces. These virtual interfaces on the router > (6513 is used as a layer 3 device) are named vlan1, vlan2, etc.,.
They show up as normal interfaces under cfgmaker, but they don't have very much traffic associated with them, since the counters don't include cut-through traffic. The real question becomes, then, why bother to monitor it? If you want to observe resource exhaustion, that won't tell you, since the effective max-bytes for a virtual interface is the backplane speed of the switch (32GB/sup1A or SupII with out fabric, or 256GB with fabric, or I forget how much with the new Sup III...) Counting just the first packet of each flow isn't going to get you there any time soon... If you are monitoring it because it is a pretty number to put on a graph, just tell management to forget it. It's a meaningless number. If you are trying to do billing, then I'd look at using netflow accounting, but practice with it first... -- Daniel J McDonald, CCIE 2495, CNX Austin Energy -- 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
