有关思科路由器频繁死机的问题...

一台思科2611路由器，内存16M，作为二级路由器与思科3611路由器通过一个10M模块相连。自身端口均为100M .现在频繁死机，出现如下错误： %% Low on memory; try again later 1d04h: %SYS-2-MALLOCFAIL: Memory allocation of 5000 bytes failed from 0x803C2E30 , alignment 0 Pool: Processor Free: 266796 Cause: Memory fragmentation Alternate Pool: None Free: 0 Cause: No Alternate pool -Process= "IP Input", ipl= 0, pid= 28 -Traceback= 803C6E6C 803C953C 803C2E34 80972384 809724F0 80972ED0 80974330 80969 8B0 8047D080 8047BD7C 8047BF30 8047C080 803E91C4 1d04h: %SYS-2-MALLOCFAIL: Memory allocation of 5000 bytes failed from 0x803C2E30 , alignment 0 Pool: Processor Free: 266900 Cause: Memory fragmentation Alternate Pool: None Free: 0 Cause: No Alternate pool

我百思不得其解。求助与各位。我怀疑与端口速率不匹配有关，可又没有确凿的理论支持