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buffer tweaking on 3825 router

Does anyone have a link or reference for tweaking buffers? I have a 3825 that is serving as my internet gateway and looking into what seems to be a growing sluggisness on the internet I discovered the following. It seems that there is an excessive amount of misses but want to make sure that I do not overbalance memory or starve other processes.

suggestions / recommendation ??

Buffer elements:

1117 in free list (500 max allowed)

86962944 hits, 0 misses, 1119 created

Public buffer pools:

Small buffers, 104 bytes (total 126, permanent 50, peak 145 @ 7w0d):

95 in free list (20 min, 150 max allowed)

31481036 hits, 30288 misses, 30010 trims, 30086 created

3521 failures (0 no memory)

Middle buffers, 600 bytes (total 88, permanent 25, peak 119 @ 7w0d):

80 in free list (10 min, 150 max allowed)

6580495 hits, 108121 misses, 10580 trims, 10643 created

28939 failures (0 no memory)

Big buffers, 1536 bytes (total 50, permanent 50, peak 172 @ 7w0d):

50 in free list (5 min, 150 max allowed)

16519559 hits, 1433 misses, 829 trims, 829 created

376 failures (0 no memory)

VeryBig buffers, 4520 bytes (total 10, permanent 10, peak 12 @ 7w0d):

10 in free list (0 min, 100 max allowed)

249237 hits, 51 misses, 6 trims, 6 created

51 failures (0 no memory)

Large buffers, 5024 bytes (total 1, permanent 0, peak 2 @ 7w0d):

1 in free list (0 min, 10 max allowed)

5 hits, 46 misses, 854 trims, 855 created

46 failures (0 no memory)

Huge buffers, 18024 bytes (total 1, permanent 0, peak 2 @ 7w0d):

1 in free list (0 min, 4 max allowed)

2 hits, 44 misses, 854 trims, 855 created

44 failures (0 no memory)

Interface buffer pools:

CD2430 I/O buffers, 1536 bytes (total 0, permanent 0):

0 in free list (0 min, 0 max allowed)

0 hits, 0 fallbacks

IPC buffers, 4096 bytes (total 2, permanent 2):

2 in free list (1 min, 8 max allowed)

0 hits, 0 fallbacks, 0 trims, 0 created

0 failures (0 no memory)

Header pools:

Header buffers, 0 bytes (total 768, permanent 768):

256 in free list (128 min, 1024 max allowed)

512 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

512 max cache size, 512 in cache

99858 hits in cache, 0 misses in cache

Particle Clones:

1024 clones, 0 hits, 0 misses

Public particle pools:

F/S buffers, 256 bytes (total 768, permanent 768):

256 in free list (128 min, 1024 max allowed)

512 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

512 max cache size, 512 in cache

0 hits in cache, 0 misses in cache

CRYPTO_HW buffers, 1548 bytes (total 1536, permanent 1536):

0 in free list (0 min, 1536 max allowed)

1536 hits, 0 misses

1536 max cache size, 1024 in cache

512 hits in cache, 0 misses in cache

Normal buffers, 1676 bytes (total 3840, permanent 3840):

3840 in free list (128 min, 4096 max allowed)

0 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

2 REPLIES

Re: buffer tweaking on 3825 router

Have a look at this link. thoug hit does not talk about 3825, it shoudl give an idea

http://www.cisco.com/warp/public/63/buffertuning.html

Also it is advisable to speak to TAC before doing any chnages to the buffer

HTH

Narayan

Re: buffer tweaking on 3825 router

I concur, don't F* with the buffers unless you have a really good reason to do so and really know what you're doing - and the impact of this. TAC is the way to go - 100%.

-brad

www.ccbootcamp.com

(please rate the post!)

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