hi,
On Thu, May 31, 2001 at 06:48:21PM +0200, Gert Doering wrote:
> I did try "remove it on the eBGP session and reboot", but never thought of
> "remove it on all the sessions (and optionally reboot)". Will try and
> then report back.
So... now I'm back with some numbers. Interesting, indeed.
One fact that I observed was that 12.0(14)S is smarter than 11.1CC :-) -
when disabling "soft in", it just drops the extra information. When
enabling it, it sends out a "route refresh" request (if the peer supports
it - mines do), and then stores the extra information.
OTOH, it doesn't really make any difference.
This is with no "soft in" configured at all:
Cisco-INXS#sh mem
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 612C1E20 97772000 70680688 27091312 24639840 13172380
I/O 7000000 16777216 3667676 13109540 12837656 13093628
and this is with "soft in" configured on the upstream link, with
102000 received prefixes:
Cisco-INXS#sh mem
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 612C1E20 97772000 71213680 26558320 24639840 13172380
I/O 7000000 16777216 3667676 13109540 12837656 13093628
- this half a megabyte isn't really worth discussing about.
Now this leads to the question: what's BGP doing with all the memory?
BGP router identifier 193.149.44.45, local AS number 5539
BGP table version is 414460, main routing table version 414460
102939 network entries and 124917 paths using 14070339 bytes of memory
40202 BGP path attribute entries using 2090504 bytes of memory
3 BGP rrinfo entries using 72 bytes of memory
18815 BGP AS-PATH entries using 462124 bytes of memory
236 BGP community entries using 10148 bytes of memory
18229 BGP route-map cache entries using 291664 bytes of memory
40846 BGP filter-list cache entries using 653536 bytes of memory
BGP activity 136579/29979 prefixes, 499546/367099 paths
summed up this gives 17578387 "bytes of memory", which is a quite
acceptable figure :-).
"show proc mem" on the other hand gives:
PID TTY Allocated Freed Holding Getbufs Retbufs Process
84 0 95271656 832412 56324252 0 0 BGP Router
which seems to be about 3 times the abount that BGP admits to be
using...
I do know that when I enable CEF, the memory used by CEF will be charged
to "BGP router". But CEF is disabled.
So - can any of you wizards explain to me what this box is doing with
the 40 Mbytes of "hidden" memory...?
(I will reboot the box later tonight, to find out whether reloading
after clearing "soft in" releases additional memory or not).
regards,
gert
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Gert Doering - Munich, Germany gert@greenie.muc.de
fax: +49-89-35655025 gert.doering@physik.tu-muenchen.de
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