just a question or two in line below -- TANSTAAFL "there ain't no such thing as a free lunch"
""Keith Woodworth"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I need to trouble shoot some apparent packet loss on a 7206VXR with a > NSE-1. > > Weve had some folks downstream of us say that doing traceroutes to their > network through us that packets are dropping on our router. I'd like to > find a way to actually see if this is the case. I'm kind of concerned that > it handling too much traffic for the backplane. > > It has 6 Faste connections, one of which is going to our upstream that > handles on avg about 15 Megs out and about 18 Megs in. > > One item of note is this router is connected to our upstream providers > router via faste connection to their 7204vxr which handles a radio based > DS3 for our primary connectivity. > > They have told us to config our ethernet port to half duplex so packets > will be retransmitted if they get lost in their ATM cloud so we have a > fairly high collison rate on this port. I dont know enough about ATM to > say if this is good or bad...? CL: huh? the retransmission is determined from and between the source and destination hosts, not by routers along the way. this half duplex instruction doesn't make sense to me. > > We policy route and use ip route-cache policy on each interface. Main > interfaces show no drops on the input side on the two busiest faste ports: CL: have you considered doing traffic studies to determine if any qos type services could be of benefit? anything like traffic shaping, random early detect, things like that? > > Output queue 0/40, 0 drops; input queue 0/75, 0 drops > > Output queue 0/40, 1466359 drops; input queue 0/75, 0 drops > > Output side here we rate-limit outgoing P2P stuff a bit. > > CPU usage is about 20-25% on avg depending on time of day. > > Been hunting on CCO about the NSE-1 to find out what it can handle PPS > wise but nothing so far except stuff on PXF and CEF and how great the > NSE-1 is. Anyone know PPS for this device? CEF is not turned on but > wondering if it would make a diff? CL: according to the following link, up to 400,000 pps http://www.cisco.com/warp/public/cc/pd/rt/7200/prodlit/c7200_ds.htm your description doesn't indicate you have oversubscribed the back plane. > > Customer is doing traceroutes from http://visualroute.visualware.com and > doing our own it does indeed show packet loss starting at our router. > Though I'm not one to take that at face value. > > Anyway to acutally tell for certain if the router is dropping packets? show buffers show queueing show queue interface etc. > > thanks for any input. > Keith Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=57925&t=57922 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
