This. We have a Comcast MetroE PtP connection between our office and our datacenter and I found that it was defaulting to half duplex. I forced both of my ends to 100 Full and it fixed my issue.
Derek On Mar 29, 2012, at 8:47 PM, Brielle Bruns wrote: > On 3/29/12 6:36 PM, Brian R. Watters wrote: >> We are about to accept a 20MEG Ethernet feed via Comcast and their >> fiber plant as well as a BGP feed across the same link. >> >> I have a space GIGE interface on a 7206VXR and would like to know >> best practice for deploying for optimal performance across this >> interface. >> >> Any ideas and or direction would be extremely helpful as we are >> seeing some real issues such as. >> >> Direct connect (without BGP) to the CPE from Comcast (Fiber to >> Ethernet) via a laptop gives the level of performance we would >> expect, However as soon as we terminate to our router via the GIGE >> which is set to 100MB full duplex and all flow control turned off >> (Negotiation auto) per Comcast and connect up via a 100MB fast >> Ethernet interface directly connected we get a fraction of the speed >> when direct connected. > > > > From my own experience here with our 7200s, some of the PA based 100BaseT > interfaces (ie: not on the IO module) can not negotiate 100-full, but rather > only half. This leaves one end diff then the other and creates issues with > performance. Try forcing both the laptop and router to 100-full and see if > it helps. > > > -- > Brielle Bruns > The Summit Open Source Development Group > http://www.sosdg.org / http://www.ahbl.org >