Re: Talked about this before

["Forrest W. Christian" <forrestc () imach com>]

On Mon, 9 Sep 2002, Pawlukiewicz Jane wrote:

> Quick Question, how much memory does the bgp tables actually take. I'm
> estimating 32 mb in my plan, but I'm worried that's not enough.

Two views:

hln-cs1#sh ip bgp summ
BGP router identifier 206.127.65.1, local AS number 4043
BGP table version is 132881, main routing table version 132881
112575 network entries and 336143 paths using 24365495 bytes of memory
60397 BGP path attribute entries using 3624720 bytes of memory
53004 BGP AS-PATH entries using 1426946 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
20536 BGP filter-list cache entries using 246432 bytes of memory
Dampening enabled. 96 history paths, 45 dampened paths
111752 received paths for inbound soft reconfiguration
BGP activity 112575/456 prefixes, 336319/176 paths, scan interval 15 secs

That said:

hln-cs1#sh mem
                Head    Total(b)     Used(b)     Free(b)   Lowest(b)
Largest(b)
Processor   623C83E0   219380768   117525008   101855760   100536360
100521172
      I/O    F500000    11534336     8157292     3377044     3365952
3352444

By the time you populate the routing table and/or cef, and do a few other
things, you probably want at least 256MB.

If you are using something else, YMMV - it all depends on how efficient
the software is at storing it in memory.

- Forrest W. Christian (forrestc () imach com) AC7DE
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