Chapter 7. Upgrading EOS

Upgrading EOS is a simple process. In a nutshell, get the software image onto the switch, configure the switch to see the new image, and then reboot the switch. Let’s start by taking a look at the current version of EOS on our 7124S switch by using the show version command:

Arista#sho ver
Arista DCS-7124S-F
Hardware version:    06.02
Serial number:       JSH10170315
System MAC address:  001c.7308.80ae

Software image version: 4.7.8
Architecture:           i386
Internal build version: 4.7.8-535760.EOS478
Internal build ID:      530a4112-b24f-40ef-bbe2-8c4b139a797d

Uptime:                 4 days, 20 hours and 4 minutes
Total memory:           2042400 kB
Free memory:            891220 kB

We can see from this output that our switch is running EOS version 4.7.8.

Note

Check out the model number in the first line of output, which reads DCS-7124S-F. The -F indicates that this switch shipped with front-to-rear airflow fans. If the model number had a -R appended to it, the fans would be rear-to-front. Cool, huh? Well I think it is, but then, little things like this excite me.

If we felt like poking around further where we don’t belong (and who doesn’t?), then we could use the show version detail command, which will regale us with page upon page of process names and their requisite versions:

Arista#sho version detail Arista DCS-7124S-F Hardware version: 06.02 Deviations: D0000213, D0000203 Serial number: JSH10170315 System MAC address: 001c.7308.80ae Software image version: 4.7.8 Architecture: i386 Internal build version: 4.7.8-535760.EOS478 ...

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