which memory used to store ip routing table ?

[mohammed hashim]

hi all

which memory in cisco routers is used to store ip routing table ?

thanks

[Reza Sharifi]

Hi.

DRAM.  If you need to contain the entire Internet routing table, you need at least 512Mb of DRAM.

HTH

[daniel.dib]

It depends on the plaform. There is a good Cisco Live presentation by Pete Lumbis:

IOS Routing Internals

BRKARC-2350

On CPU based platforms it would be stored in RAM. So with more RAM it's easy to fit more routes. On hardware based platforms (ASIC) it would be stored in TCAM. TCAM is faster but also expensive and not as easy to upgrade.

Daniel Dib
CCIE #37149

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