07-23-2013 01:33 AM - edited 03-04-2019 08:31 PM
Dears,
I want to know if 2921 router with 2.5 DRAM will be enough to run a bgp with the SP as there will be one link with ISP with 16M of speed ??
BR,
Abdallah
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07-23-2013 06:21 AM
I'm not convinced that 512Mb would be sufficient.
See below the amount of memory consumed for a full BGP routing table for one of my local ISPs.
route-views.optus.net.au>sh ip bgp summ
BGP router identifier 203.202.125.6, local AS number 65535
BGP table version is 232310515, main routing table version 232310515
453929 network entries using 58102912 bytes of memory
1132424 path entries using 58886048 bytes of memory
91353/74495 BGP path/bestpath attribute entries using 11327772 bytes of memory
65656 BGP AS-PATH entries using 2883588 bytes of memory
2267 BGP community entries using 161056 bytes of memory
9 BGP extended community entries using 216 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 131361592 total bytes of memory
Dampening enabled. 296 history paths, 692 dampened paths
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07-23-2013 03:04 AM
What do you mean when you say 2.5 DRAM?
Minimum required for a full BGP routing table is 512MB, though your 2921 CPU will struggle.
07-23-2013 06:21 AM
I'm not convinced that 512Mb would be sufficient.
See below the amount of memory consumed for a full BGP routing table for one of my local ISPs.
route-views.optus.net.au>sh ip bgp summ
BGP router identifier 203.202.125.6, local AS number 65535
BGP table version is 232310515, main routing table version 232310515
453929 network entries using 58102912 bytes of memory
1132424 path entries using 58886048 bytes of memory
91353/74495 BGP path/bestpath attribute entries using 11327772 bytes of memory
65656 BGP AS-PATH entries using 2883588 bytes of memory
2267 BGP community entries using 161056 bytes of memory
9 BGP extended community entries using 216 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 131361592 total bytes of memory
Dampening enabled. 296 history paths, 692 dampened paths
Fon't forget to rate all helpful posts.
07-24-2013 06:03 AM
so waht do you think sean ??
07-24-2013 06:01 AM
hi mfurniva the DRAM is 2.5G not the default which is 512M...
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