On 12/28/2017 04:10 PM, Gert Doering wrote: > Hi, > > On Thu, Dec 28, 2017 at 08:54:03PM +0000, Nick Cutting wrote: >> I would also like to know the answer to this. >> >> I always get scared and buy 16 gig if I'm taking in the full routing table. >> (4431/4451/4351 so far) >> >> I'm sure I could get away with 8. Not sure about 4, would love to know > > So how much memory do your routers use, if you have full tables? > > That should easily answer the question on whether 8 or 4 would suffice... > > A 7301 will take a full table in 1G RAM :-)
https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/white-paper-c11-734550.html "13. Scalability Tests [...] All Cisco 4000 platforms support a full Internet routing table (500,000 prefixes) @ 8-GB DRAM. The 4451 supports two full Internet routing tables (1 million prefixes) @ 16-GB DRAM." However, be careful: first, the full table is around 700K nowadays; second, the interpretation of "route". For an ASR 1K a "route" means "an entry in the RIB for each protocol" instead of "an entry in the routing table" so if your router has 2 upstreams, each sending its full-table through BGP it actually means you must size your router RAM to fit 2 full routing tables, not one. Best regards, Octavio. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/