1.问题描述

硬件：C93180YC（Nexus NXOS）

软件版本：Release 9.3.8

需要描述：需要将Nexus93180从Release 9.3.8升级到10.3.6（M），在执行操作的时候，发现如下问题，提示“不是一个有效的NXOS镜像”。

switch# install all nxos bootflash:nxos64-cs.10.3.6.M.bin
Installer will perform compatibility check first. Please wait.
Installer is forced disruptive

Verifying image bootflash:/nxos64-cs.10.3.6.M.bin for boot variable "nxos".
[# ] 0% -- FAIL.
Return code 0x40450037 (Not a valid nxos image).

Please check the image cksum using `show file <image> md5sum`.
Pre-upgrade check failed. Return code 0x40450037 (Not a valid nxos image).

2.解决方案

从官方的角度来说，升级设备，有推荐的路径。如下所示：

其实也可以直接升级，不过需要做的操作有点不同。下面我们来记录如何直接升级，且不报错。

1）在任何时候升级，我们在操作之前，还是应该检查一下image的完整性，看看MD5是否对的上。

switch# show file bootflash:nxos64-cs.10.3.6.M.bin md5sum
0a4ebd679aaae89e44646099d17e21c9

2）进一步我们可以使用压缩该镜像：install all nxos bootflash:xxx.bin compact

switch# install all nxos bootflash:nxos64-cs.10.3.6.M.bin compact
Installer will perform compatibility check first. Please wait.
Compacting bootflash:/nxos64-cs.10.3.6.M.bin
................................
Compact bootflash:/nxos64-cs.10.3.6.M.bin done

3）进一步我们再通过install all nxos bootflash:xxx.bin命令进行升级

switch# install all nxos bootflash:nxos64-cs.10.3.6.M.bin
Installer will perform compatibility check first. Please wait.
Installer is forced disruptive

Verifying image bootflash:/nxos64-cs.10.3.6.M.bin for boot variable "nxos".
[####################] 100% -- SUCCESS

Verifying image type.
[####################] 100% -- SUCCESS

Preparing "nxos" version info using image bootflash:/nxos64-cs.10.3.6.M.bin.
[####################] 100% -- SUCCESS

Preparing "bios" version info using image bootflash:/nxos64-cs.10.3.6.M.bin.
[####################] 100% -- SUCCESS

Performing module support checks. [####################] 100% -- SUCCESS

Notifying services about system upgrade. [####################] 100% -- SUCCESS


Compatibility check is done:
Module bootable Impact Install-type Reason
------ -------- -------------- ------------ ------
1 yes disruptive reset Incompatible image for ISSU

<snip>


Switch will be reloaded for disruptive upgrade.
Do you want to continue with the installation (y/n)? [n] y


Install is in progress, please wait.

Performing runtime checks. [####################] 100% -- SUCCESS

Setting boot variables.
[####################] 100% -- SUCCESS

Performing configuration copy.
[####################] 100% -- SUCCESS

Module 1: Refreshing compact flash and upgrading bios/loader/bootrom.
Warning: please do not remove or power off the module at this time.
[####################] 100% -- SUCCESS


Finishing the upgrade, switch will reboot in 10 seconds.
switch#

待交换机重启完成之后，基本也就OK了。

3.有用的文档和工具

Change Nexus 3000, 3100, and 3500 NX-OS Compact Image File Size - Cisco

Cisco Nexus 9000 and 3000 Upgrade and ISSU Matrix