How many route entries does 3945E or/and 3900 ISR G2 support

hello guys:
I have a question concerning about how many ospf and bgp route entries does 3945E isr g2 router support?
cheers
tony xi

Tony,
This question can't be answered in general. It depends foremost on the amount of available memory in the router. With 256MB of RAM, you can expect that the router can manage roughly tens of thousands of routes. The full BGP routing table (not the BGP database) consumes around 70MB, however, the full BGP RIB on one of the route-views project routers consumes over 1100 MB of RAM (this also depends on the number of BGP peers and the amount of data sent to it by individual BGP neighbors). The exact number is impossible to determine, as it depends on the amount of other control information that the router has to store in its RAM - for example, OSPF LSDB, BGP RIB, the CEF and adjacency tables, etc. etc. etc.
So you can assume that 256MB of RAM should be working for deployments up to the order of tens of thousands but this has to be taken with a very, very rough and unreliable estimate.
Best regards,
Peter

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How many route entries does 3945E or/and 3900 ISR G2 support

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