网络工程 - Cisco 2611 路由器内存耗尽 - 吾爱随笔录

我们有一个 2000 年左右的老家伙，名叫 Cisco 2611，他最近疯了。

它每三天挂起一次，大约 10 - 20 小时。一开始我并不相信我的Observium监控系统，这是图表：

Observium - Cisco 2611 内存

而高峰恰好是它挂起的时候。之后，我对它进行了 telnet 并运行

cisco-router#show memory summary

这是输出的顶部：

cisco-router#show memory summary
               Head   Total(b)    Used(b)    Free(b)  Lowest(b) Largest(b)
Processor  80D02AA0   15717728    7384968    8332760    8322064    8325568
      I/O   1C00000    4194304    1832344    2361960    2344108    2361916

几秒钟后...：

cisco-router#show memory summary
               Head   Total(b)    Used(b)    Free(b)  Lowest(b) Largest(b)
Processor  80D02AA0   15717728    7386864    8330864    8322064    8325568
      I/O   1C00000    4194304    1832344    2361960    2344108    2361916

五分钟后：

cisco-router#show memory free
               Head   Total(b)    Used(b)    Free(b)  Lowest(b) Largest(b)
Processor  80D02AA0   15717728    7397072    8320656    8312776    8318048
      I/O   1C00000    4194304    1832344    2361960    2344108    2361916

CPU 负载稳定，始终低于 5%，接口负载非常轻。

处理器内存像疯了一样吃光了。我不完全明白发生了什么，但我看到一些不好的事情正在发生。它甚至多次清除配置。

你们中有人有类似的问题吗？我如何进一步排除故障以及如何理解我提交的命令的进一步输出，我想我可以在那里找到一个恶棍？

附注。差点忘了

cisco-router#show version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IO3-M), Version 12.0(7)XK1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
TAC:Home:SW:IOS:Specials for info
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Wed 15-Mar-00 05:51 by phanguye
Image text-base: 0x80008088, data-base: 0x80877DA8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
ROM: C2600 Software (C2600-IO3-M), Version 12.0(7)XK1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

cisco-router uptime is 11 hours, 3 minutes
System returned to ROM by power-on at 13:24:01 EET Thu Jan 27 2011
System restarted at 00:03:27 WET Wed Jun 18 2014
System image file is "flash:aaa1313.bin"

cisco 2611 (MPC860) processor (revision 0x203) with 28672K/4096K bytes of memory.
Processor board ID JAD04210DI1 (1380643539)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
2 Ethernet/IEEE 802.3 interface(s)
8 Low-speed serial(sync/async) network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

更新：

走得更远，看了看：

cisco-router#show processes memory
Total: 15717728, Used: 7445296, Free: 8272432
<unrelated>
 PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
  58   0  395438908  394183536    1268100          0          0 IP SNMP
<unrelated>

该Holding值在不断增加。那是怎么回事？可以Observium使用 SNMP 对它做一些讨厌的事情吗？