On Fri, Jul 17, 2009 at 02:19:21PM -0300, Livio Zanol Puppim wrote:
Thank you guys, This will be useful, but I still have some questions: Where can I see comparations between the routers? Also, where can I find datasheets containing FIB, RIB and BGP routes limits for cisco and Juniper? It is quite dificult!
You won't. All of the numbers published by vendors for such things are pretty much complete and total fabrications, and will vary greatly depending on platform, code, configuration, what features you have turned on, etc. For example, many people attempting to run code written in the last couple of years on Juniper M5/M10 have already discovered that they had to go unofficially hack^H^H^H^H upgrade the FEB DRAM to support their configuration even though the FIB (in FEB SRAM) was nowhere near capacity. Also, some routes will consume more memory than others (consider 1mil unique routes vs 4x paths of the same 250k unique routes). It is all but impossible to come up with an accurate generic description of how much horsepower you'll get out of a specific amount of memory, one would need to know the platform, code, and configuration of your network to make any kind of educated guess at all. Either find someone with experience to consult for you, or buy something new and shiny that is complete overkill and will last you for years. I think the Juniper MX is the most scalable platform in terms of FIB capacity right now, thanks to their RLDRAM architecture. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)