08-13-2012 06:27 AM - edited 03-04-2019 05:15 PM
I am looking for a simple router recomendation for multihoming dual 100Mbps internet connections with BGP routing. What are the current best practices regarding required resources for the full Internet BGP routing table? We were thinking of specing a 3945 for this application, but is that overkill? The customer has a 2821 that is not in use, I'm thinking this would be too slow for Internet BGP routing combined with the 100Mbps line speed.
08-13-2012 06:32 AM
Look E.g 2951, 3925, 3925E, these are slim and fast. Also a budget matter after all.
08-13-2012 11:53 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
For dual 100 Mbps, the 2951 might be just a tad on the small side.
08-13-2012 11:56 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Unsure what the full Internet table is up to now, but probably want to allow about 20 MB per peer.
On the other hand, with an ISR that supports PfR, I would recommend it vs. taking the Internet route tables.
08-13-2012 07:16 PM
Ian Brennan wrote:
I am looking for a simple router recomendation for multihoming dual 100Mbps internet connections with BGP routing. What are the current best practices regarding required resources for the full Internet BGP routing table? We were thinking of specing a 3945 for this application, but is that overkill? The customer has a 2821 that is not in use, I'm thinking this would be too slow for Internet BGP routing combined with the 100Mbps line speed.
If you want full duplex, 200 Mbps throughput (400 Mbps total), you're going to need a 3925 to get the throughput - regardless of the BGP capacity. If you can get them to spring for it, an ASR would be better - maybe a 1001, but that'd cost a lot more, I think. Both the ASR1001 and 3945 would be overkill, but provide for expansion - the 3925 will do the job as long as you get enough RAM.
Full BGP table runs to something like 80 meg now, from memory (390 000 odd routes), so you should allow a minimum of 1 gig RAM - I'd be putting in 2 if you can afford it.
Cheers.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: