cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
545
Views
4
Helpful
4
Replies

Can SUP720 boot and work with external flash only?

gfolens
Level 4
Level 4

One of our customers wants to move the internal flash cards of their SUP720 (IOS v12.2(33)SRA1)into slot0 for easy access to the flash cards in case of upgrades and changes.

Can the switch boot from slot0 without internal flash installed? what happens in case of crash? will the dump be written to Slot0 flash? Any other loss of functionality?

rgds, Geert Folens.

4 Replies 4

eofelt
Level 1
Level 1

Hi

Yes, it is possible.

By default, the router first tries to boot from the first image in the onboard system Flash, if available, and then it tries the PCMCIA Flash cards.

The user may also specify which images or locations to attempt booting from and the order using the boot system command in configuration mode:

IOS(config)# boot system slot0

Here's a great PDF that has some very

good suggestions (and configs) regarding this isssue starting on page 14.

http://www.securitymap.net/sdm/docs/netsec/IOS%20Essentials%202-82.pdf

hth, please rate

Thanks for your reply. but the link with the pdf is not working...

rgds, Geert Folens.

Thanks and regrets.

If you post an email, I'll will

send the pdf. It's ~577kb.

Erik

Meanwhile I managed to download the doc via the link.

thanks

rgds, Geert.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco