请选择 进入手机版 | 继续访问电脑版

设为首页 收藏本站
思科社区 关注
思科社区

  思科 CCO 登录 推荐
 找回密码
 立即注册

搜索
热搜: 邮件服务器
查看: 1302|回复: 2

【原创分享】Cat4k MuxBuffer 鉴定

[复制链接]
发表于 2018-2-28 17:32:51 | 显示全部楼层 |阅读模式
首先,大家要知道什么是Muxbuffer。
一般大家都会知道 Cat65/76 的 fabric channel是做什么的,虽然Cat45 没有 Cat65/76 那么高大上,但好歹也是同样流淌着Catalyst的血脉啊~ 承载的能力也不弱啊!!!

说到这,我觉得大家也都猜到了吧, Bingo! MuxBuffer和Fabric channel在某种程度上扮演着同样地角色~!


有些时候我们的cat45也会闹一些小脾气,比如突然某些板卡不能转发流量了,重新插拔也没有解决,然后报了一堆log:

%C4K_CHASSIS-3-MUXBUFFERREADSUPERVISORSELECTIONFAILED:Failed to read linecard [dec]
muxbuffersupervisor selection register

Cisco的官方解释:
Theactive supervisor tried to read alignment information for the switching moduleslot's
muxbuffer from the chassis mux buffer module, but was unable to do so. Thisinformation
isneeded to make sure that switching module slot's mux buffer is aligned towardsthe
activesupervisor engine.

总的来说就是不能读取某些槽位的数据了,怀疑是muxbuffer相关的问题。


解读完log后,接下来我们怎么办呢?必做的检测方式就是交叉测试;
<1> 把不能正常使用的该槽位板卡放在其他机箱上测试,看是否能使用。
<2> 如果可以正常使用,那么90%是muxbuffer的问题,当然最终确定我们可以交给Cisco TAC工程师来最终确定。
  


下面是CCO上的文档,怎么更换muxbuffer。

RRemoving and Installing the Backplane Modules
[size=12.2360000610352px]There are five redundancy modules (also called mux buffers) and one clock module on the Catalyst 4507R-E and the Catalyst 4507R+E switch chassis backplane. The Catalyst 4510R-E and the Catalyst 4510R+E have eight redundancy modules on their backplane. They are accessible from the front of the chassis by removing all of the supervisor engines, switching modules, and blank slot covers. There are two types of redundancy modules, and they are interchangeable.
[size=12.2360000610352px]The clock module replacement procedure is identical to the redundancy module replacement procedure. Both the redundancy modules and the clock modules are not hot-swappable; the switch must be shut down to replace them.
[size=12.2360000610352px]To replace the backplane modules, follow these steps:

[size=12.2360000610352px]Step 1 Make sure that you are grounded with an ESD strap.
[size=12.2360000610352px]Step 2 Turn off the power to the chassis.
[size=12.2360000610352px]Step 3 Make a record of all network interface cable connections to the switch. Also, make a record of the switching modules and their slot assignments. This step will aid you when you return the system to operation after the removal and replacement procedure is completed.
[size=12.2360000610352px]Step 4 Disconnect all of the network interface cables to the switch and carefully set them aside.

Step 5 Remove all supervisor engines and switching modules from the chassis and carefully place each one in a separate antistatic bag or on an individual antistatic mat.






注意:
以上更换方式是cat45 不带-E的机箱更换方式,机箱带-E的CCO文档也是这样描述的。

但是,实际上带-E的机箱却是这个样子的~~






不带-E的机箱muxbuffer长得像内存条一样,但是带-E却不是,会更大一些。
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
平均得分5 (4 评价)
发表于 2018-3-1 13:38:29 | 显示全部楼层
相当棒的分享,手动点赞,并送上5星好评
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
平均得分1 (1 评价)
发表于 2018-3-5 10:49:59 | 显示全部楼层
谢谢TAC专家!
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
平均得分1 (1 评价)
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

Archiver | 思科社区  

GMT+8, 2018-12-19 10:13 , Processed in 0.088212 second(s), 33 queries .

京ICP备09041801号-187

版权所有 :copyright:1992-2019 思科系统  重要声明 | 保密声明 | 隐私权政策 | 商标 |

快速回复 返回顶部 返回列表