3550-emi %SYS-2-MALLOCFAIL报错问题，请版主及各位老大指点

sunjb168

目前设备工作基本正常，但今日总是有如下的提示情况，CPU负载不大，请版主及各位老大指点一下，谢谢！！！
nc-28#show log
2w0d: %SYS-2-MALLOCFAIL: Memory allocation of 1680 bytes failed from 0x1627E4, alignment 0
Pool: I/O  Free: 7360  Cause: Memory fragmentation
Alternate Pool: None  Free: 0  Cause: No Alternate pool

-Process= "Pool Manager", ipl= 0, pid= 6
-Traceback= 1A647C 1A7AA0 1627E8 1B389C 1B3AE4 1C70E0


nc-28#show proc c | e 0.00
CPU utilization for five seconds: 3%/1%; one minute: 4%; five minutes: 4%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  10    10994216  30493379        360  0.24%  0.85%  0.64%   0 ARP Input        
  26     4887700   3665462       1333  0.40%  0.40%  0.40%   0 Vegas Statistics
  37      930052   7661672        121  0.32%  0.08%  0.06%   0 IP Input         
  42     4890476   1221880       4002  0.40%  0.40%  0.40%   0 PI MATM Aging Pr
  44    13870624 118968925        116  1.06%  0.82%  0.82%   0 Spanning Tree


nc-28#show version
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I5K2L2Q3-M), Version 12.1(13)EA1a, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 25-Mar-03 23:56 by yenanh
Image text-base: 0x00003000, data-base: 0x008BA914

ROM: Bootstrap program is C3550 boot loader

nc-28 uptime is 2 weeks, 4 hours, 47 minutes
System returned to ROM by power-on
System image file is "flash:/c3550-i9q3l2-mz.121-11.EA1/c3550-i5k2l2q3-mz.121-13.EA1a.bin"