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