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3560G Memory problem

Julio Garcia
Level 1
Level 1

I have a bit of problem with a 3560g switch on our network.

It has developed memory allocation issues.. some outputs below...

ServerSwG1#show memory summary
                       Head    Total(b)     Used(b)          Free(b)       Lowest(b)     Largest(b)
Processor    1A9D784    91906532    31278656    60627876    60296420    60296904
      I/O         7400000    12574720    12568208        6512        6512          1504

in the logging i get various processes reporting memory allocation failure..

-Process= "Pool Manager", ipl= 0, pid= 5
-Traceback= 96AC40 DECC50 DF08FC 270B70 275404 275558 75D788 7579CC
Sep 14 14:12:43: %SYS-2-MALLOCFAIL: Memory allocation of 1696 bytes failed from 0x270B6C, alignment 8
Pool: I/O  Free: 6512  Cause: Memory fragmentation
Alternate Pool: None  Free: 0  Cause: No Alternate pool

-Process= "Pool Manager", ipl= 0, pid= 5
-Traceback= 96AC40 DECC50 DF08FC 270B70 275404 275558 75D788 7579CC
Sep 14 14:13:13: %SYS-2-MALLOCFAIL: Memory allocation of 1696 bytes failed from 0x270B6C, alignment 8
Pool: I/O  Free: 6512  Cause: Memory fragmentation
Alternate Pool: None  Free: 0  Cause: No Alternate pool

-Process= "Pool Manager", ipl= 0, pid= 5
-Traceback= 96AC40 DECC50 DF08FC 270B70 275404 275558 75D788 7579CC
Sep 14 14:13:43: %SYS-2-MALLOCFAIL: Memory allocation of 1696 bytes failed from 0x270B6C, alignment 8
Pool: I/O  Free: 6512  Cause: Memory fragmentation
Alternate Pool: None  Free: 0  Cause: No Alternate pool

-Process= "Pool Manager", ipl= 0, pid= 5
-Traceback= 96AC40 DECC50 DF08FC 270B70 275404 275558 75D788 7579CC
Sep 14 14:14:13: %SYS-2-MALLOCFAIL: Memory allocation of 1696 bytes failed from 0x270B6C, alignment 8
Pool: I/O  Free: 6512  Cause: Memory fragmentation
Alternate Pool: None  Free: 0  Cause: No Alternate pool

here is sh ver...

Cisco IOS Software, C3560 Software (C3560-IPSERVICES-M), Version 12.2(25)SEB4, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Tue 30-Aug-05 14:19 by yenanh

ROM: Bootstrap program is C3560 boot loader
BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(25r)SE1, RELEASE SOFTWARE (fc)

ServerSwG1 uptime is 1 year, 21 weeks, 2 days, 23 hours, 7 minutes
System returned to ROM by power-on
System restarted at 15:06:09 UTC Fri Apr 17 2009
System image file is "flash:c3560-ipservices-mz.122-25.SEB4/c3560-ipservices-mz.122-25.SEB4.bin"

cisco WS-C3560G-48TS (PowerPC405) processor (revision C0) with 118784K/12280K bytes of memory.
Processor board ID FOC1004Z5U0
Last reset from power-on
2 Virtual Ethernet interfaces
52 Gigabit Ethernet interfaces

ServerSwG1#sh processes cpu | exclude 0.00%__0.00%__0.00%
CPU utilization for five seconds: 5%/0%; one minute: 5%; five minutes: 5%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
   4    46209324   5283093       8746  0.00%  0.12%  0.11%   0 Check heaps
  30     6647336   8965893        741  0.00%  0.01%  0.00%   0 Compute load avg
  35    332974121135628769         29  0.00%  0.03%  0.00%   0 RedEarth Tx Mana
  41    559563542357362707         23  0.00%  0.02%  0.01%   0 Fifo Error Detec
111    82585256   8880662       9299  0.15%  0.15%  0.15%   0 HQM Stack Proces
120    92112622  43955598       2095  0.00%  0.01%  0.00%   0 PI MATM Aging Pr
142    57241862 380353073        150  0.00%  0.02%  0.00%   0 IP Input
145   364030563 191828039       1897  0.00%  0.01%  0.00%   0 Spanning Tree
187        4525     22805        198  0.31%  0.09%  0.21%   1 Virtual Exec

the switch doesnt do anything intensive, is used pure at layer 2

any ideas why its suddenly developed this error? , i will reboot the switch tonight.

2 Replies 2

glen.grant
VIP Alumni
VIP Alumni

   Go to a newer IOS and reboot . It's the only way to free up the memory.  We have seen memory leak issues on both the 3560's and 3750's series and rebooting is the only way to fix this .  Your IOS version is pretty old now .  Rebooting by itself will also free up the memory if you so choose not to upgrade , at least until the next time you get memory fragmentation.

thanks very much

i was always meaning to upgrade ios in a timely fashion , but with the amount of devices we have coupled with the fact no one wants downtime makes it very hard

wil the switch work ok for the next few hours?, im kinda worried. it seems to be fine for the moment.

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