BGP peering strategies for smaller routers

Mike mike-nanog at tiedyenetworks.com
Tue May 3 02:43:50 UTC 2016


On 05/02/2016 07:35 PM, Eric Sabotta wrote:
> Mike,
>
> I just did this with a ASR1001.  I had to upgrade it to 8gb of ram (I got the real Cisco stuff for ~ $500).  Before the router would crash when loading the tables.
>
> Right now, I have full tables from two providers:
>
> router1#show ip bgp summary
> BGP router identifier 192.55.82.2, local AS number 4505
> BGP table version is 11150622, main routing table version 11150622
> 582461 network entries using 144450328 bytes of memory
> 911730 path entries using 109407600 bytes of memory
> 148924/93298 BGP path/bestpath attribute entries using 36933152 bytes of memory
> 132977 BGP AS-PATH entries using 6043938 bytes of memory
> 0 BGP route-map cache entries using 0 bytes of memory
> 0 BGP filter-list cache entries using 0 bytes of memory
> BGP using 296835018 total bytes of memory
> BGP activity 962568/380103 prefixes, 5155645/4243915 paths, scan interval 60 secs
>
> Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
> 192.55.82.3     4         4505 2532914 1634867 11150622    0    0 3w0d       330377
> 192.55.82.4     4         4505  672950 1634865 11150622    0    0 3w0d            1
> 209.117.103.33  4         2828 1837130   48052 11150557    0    0 2w1d       581351
>
> router1#show ip cef summary
> IPv4 CEF is enabled for distributed and running
> VRF Default
>   582527 prefixes (582527/0 fwd/non-fwd)
>   Table id 0x0
>   Database epoch:        2 (582527 entries at this epoch)
>
> -Eric
>

But if I'm reading the above right, it looks like bgp is eating ~300mb 
on your box.

BGP using 296835018 total bytes of memory

You would seem to have plenty of free ram. In my case, the ASR1002 doesn't have upgradable memory anyways so I'm stuck.

Mike-




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