Cisco Cisco Nexus 5010 Switch Guida All'Installazione

To upgrade the access layer without a disruption to hosts, follow these tasks:

Upgrade the first vPC switch (vPC primary switch). During this upgrade, the switch is reloaded. 
When the switch is reloaded, the servers or the downstream switch detects a loss of connectivity to 
the first switch and starts forwarding traffic to the second (vPC secondary) switch.

Verify that the upgrade of the switch has completed successfully. At the completion of the upgrade, 
the switch restores vPC peering, connected Cisco Nexus Fabric Extenders, and all the links.

Upgrade the second switch. Repeating the same process on the second switch causes the second 
switch to reload during the upgrade process. During this reload, the first (upgraded) switch forwards 
all the traffic to/from servers.

Verify that the upgrade of the second switch has completed successfully.

Flows that are forwarded to a switch during an upgrade on the switch, fails over to the second switch. 
Also, flows are redistributed when vPC peers are active. The traffic disruption is limited to the time 
required for the server or host to detect the link-down and link-up events and to redistribute the flows. 

Upgrading Cisco NX-OS Software by changing the boot-variables and performing a reload is not 
supported in Cisco Nexus 5000 and 6000 Series Switches. This may result in loss of configuration and 
forwarding issues.

 lists the show commands that are used to monitor installation upgrades.

237890

Nexus 5010

Nexus 5020

Displays the Fabric Extender status during an ISSU.

Displays the applications that failed during an installation and why 
the installation failed.

Displays a high-level log of the installation.

Displays detailed logs of the last installation-related command.