On 17/02/2011 09:11, Mounir Mohamed wrote:
It depends on the number of BGP sessions you gone use, multiple BGP sessions with full internet routing table (340K right now) will be stored smoothly on an RP with 4G or 8G memory, but after completing the BGP decision process it will end up with less than 500k on the forwarding path (ESP5 with 500k limit), so till now no problem, but if you are planning to use a multipath option (rare in ISP) you may have a problem.
A hard 500k prefix limit means that the hardware has an effective useful lifetime in the DFZ of maybe 2 years at a maximum. If your depreciation period is > 2 years, you need to consider getting a device with more tcam than this. The larger asr1ks fit the bill in this regard.
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