The routing table alone consumes about 512 MB RAM.
From the show ip bgp summary:
BGP using 806689552 total bytes of memory
BGP is using another 800 MB of memory.
So for a full routing table, your router must have at least 2GB of RAM, and if you turned on the IP CEF, internal routing protocols and various other services, the memory consumption would only increase further. That being said, Paolo is right: are you sure you need the full routing table?
Try using the command show ip route summary. That output will give information about the memory usage of your current routing table.
Note, however, that if you are using CEF (which you probable are) then the routing table is inserted into the CEF tree. Also, the adjacency table that the CEF points into consumes memory. These data structures will further allocate more memory. Unfortunately, I don't know the command to find out the memory allocated by the CEF and adjacency tables. Anyone to help here?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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