mcarsonsr
asked on
How to Know If I need to Upgrade my older Cisco 2811 Routers?
The environment is virtual servers in a remote data center(cloud, I guess) with a 30Mbs pipe to a fully meshed MPLS WAN with 20 T1 lines to branch locations. All routers are older Cisco 2811 10/100 routers. There is a mixture of older CLI 10/100 thin clients and 10/100 PCs. Aside from terminal services issues, application issues, and a 32-bit environment, what are the reasons to upgrade the routers? What are the questions to ask?
Thank you!
Thank you!
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asavener
Well, it depends on what their design, procurement, and implementation lead time is....
ASKER
Thank you both for your responses. I realize the question is somewhat lacking in details. The network in question is performing very poorly and I understand there are numerous and competing issues that could be causing the network congestion. Your feedback is helpful.
I should have asked if there is a definitively check list or guide that network engineers/admins go through to diagnose congestion issues in such a network.
I am not a network engineer, but I have recently read extensively on the subject and there do appear to be countless issues to check into and a number of ways to review network traffic for bottlenecks, but is there a comprehensive guide for someone to refer to?
Thanks again
I should have asked if there is a definitively check list or guide that network engineers/admins go through to diagnose congestion issues in such a network.
I am not a network engineer, but I have recently read extensively on the subject and there do appear to be countless issues to check into and a number of ways to review network traffic for bottlenecks, but is there a comprehensive guide for someone to refer to?
Thanks again
The two first things I'd look for are sustained high CPU utilization or sustained link utilization above about 85%.
(The low-ish threshold is that interfaces experiencing a synchronized TCP restart can sometimes look underutilized even though traffic is spiking to 100%, then packet getting dropped, TCP windows all reset, and then traffic builds back to 100% where the cycle starts over again.)
Check out MRTG and PRTG.
(The low-ish threshold is that interfaces experiencing a synchronized TCP restart can sometimes look underutilized even though traffic is spiking to 100%, then packet getting dropped, TCP windows all reset, and then traffic builds back to 100% where the cycle starts over again.)
Check out MRTG and PRTG.
ASKER
Thank you asavener!