Buffer failures - Can't change Medium buffers!

[david.bradley]

Hi,

I'm having failures on my Medium buffers. I would tune the buffers, but when you try to change the medium buffers you can't, there's no option.

You can change small & middle, etc.. but not Medium!

Dave

[Tsasbrink]

what kind of device are we talking about here ? with witch software version ?

But my first guess would be as the buffer size for middle and medium stands for 600 byte buffers that is is the same.

You could define this as a small cosmethic error.

[david.bradley]

hi, thanks for you reply

this is an MSFC2 - Cisco Internetwork Operating System Software

IOS (tm) MSFC2 Software (C6MSFC2-PO3SV-M), Version 12.1(11b)E, EARLY DEPLOYMENT

RELEASE SOFTWARE (fc1)

The buffer sizes for medium and middle are different:

Small buffers, 104 bytes (total 150, permanent 50, peak 169 @ 1d22h):

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

15863814 hits, 826 misses, 621 trims, 721 created

78 failures (0 no memory)

Medium buffers, 256 bytes (total 0, permanent 0, peak 13 @ 1w5d):

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

245 hits, 2818043 misses, 504 trims, 504 created

2817791 failures (0 no memory)

Middle buffers, 600 bytes (total 450, permanent 450, peak 468 @ 1w0d):

447 in free list (115 min, 600 max allowed)

5760592 hits, 9 misses, 35 trims, 35 created

0 failures (0 no memory)

Big buffers, 1524 bytes (total 500, permanent 500):

500 in free list (5 min, 500 max allowed)

129890 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

VeryBig buffers, 4520 bytes (total 3, permanent 1, peak 10 @ 2w0d):

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

2428965 hits, 25 misses, 48 trims, 50 created

[dan.gregoire]

David,

The problem that you are seeing is caused by a software bug. The ddts is CSCdx15857, you should not be seeing medium buffers except for when you are running in native mode. The fix was in 12.1(13)E and above. This problem is not service affected since when system fails to get buffer from this medium buffer pool, it will try to get buffers from next public buffer pool.

Here is a link for the bug if you would like to review it. http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCdx15857&cco_product=IOS&fset=&swver=12.1&keyw=Medium%20buffer&target=11b&train=E

[david.bradley]

Thanks Dan, time for an IOS upgrade!