In a message written on Fri, Jun 22, 2007 at 11:56:32AM -0400, Sean Donelan wrote:
Is paying for "protected circuits" actually worth it. Or are you better off just buying two circuits and using both during normal conditions. Use switching at layer 3 to the remaining circuit during abnormal conditions. Most of the time, you get twice the capacity for only twice the price instead of a "protected circuit" where you only get the once the capacity for twice the price.
Sorry, it doesn't work like that. I do happen to believe rather than get a single SONET/WDM protected 10G Wave you are better off getting two unprotected 10G waves and plugging them into your devices, and let layer 3 routing take over. It generally saves a good bit of cost, and it helps you keep the cable system honest. You know when there is an outage, no way to hide it from you. However, if you put 15G down your "20G" path, you have no redundancy. In a cut, dropping 5G on the floor, causing 33% packet loss is not "up", it might as well be down. If your redundancy solution is at Layer 3, you have to have the policies in place that you don't run much over 10G across your dual 10G links or you're back to effectively giving up all redundancy. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/ Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org