思科cisco 2960交换机自动重启案例

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在实际的网络环境中，交换机的各种问题层出不穷，这里我遇到一个案例。关于Cisco 2960  S 交换机重启的问题。

故障描述：有那么几台C2960S交换机总是随机的重启。

原因：从show ver来看，可以看到是由于power-on。

实际问题：而实际导致交换机重启的原因并不是power-on，甚至这里没有一个crashinfo的生成。

关于这个问题，在思科官网能找到类似的问题，但是是一个bug：

2960S silent reload with "System returned to ROM by power-on"
CSCtr78622

Description

Symptom:

A 2960S may reload without generating a crash file and reload reason is
reported as "System returned to ROM by power-on".

Conditions:

This issue is observed in Catalyst 2960S platform running 12.2(53)SE2.

Workaround:

None.

This bug is under investigation.

Further Problem Description:

CSCtg09555 should report more detailed reload information.

问题延伸，该问题可能不只是C2960S的问题，其他的型号也有类似的问题，例如如下的Bug：

2960x randomly reloads due to power-on
CSCus47446

Description

Symptom:
Catalyst 2960x may reboot randomly and come up. This can happen when switch is a stack member or standalone. When part of stack as a member, entire stack does not go down when a member reloads, but everything connected to the 2960x that reloaded experiences an outage.

There is no crashinfo written. Reload reason is "power-on".

Conditions:
Only PoE models are affected.

Workaround:
None.

Further Problem Description:

终结的意思可能是该问题已经通过换硬件解决了，没有通过配置或者软件的升级去解决这个问题。

2960x FPS48 randomly reloads due to power-on
CSCuu90830

Description

Symptom:
Catalyst 2960x may reboot randomly and come up. This can happen when switch is a stack member or standalone. When part of stack as a member, entire stack does not go down when a member reloads, but everything connected to the 2960x that reloaded experiences an outage.

There is no crashinfo written. Reload reason is "power-on".

Conditions:
The switch that reloaded is a PoE capable 2960X

Workaround:
None.

Further Problem Description:
This could be a hardware issue, please contact Cisco TAC for further analysis.

这应该算是一个严重的错误了。不知该问题后续是否有fixed版本。