IOS Upgrade on a 6500 with redundant SUPs in SSO mode

[Wolfgang Maier]

Hi all,

i´vre read the doc about how to upgrade the IOS on a Catalyst 6509 running redundat SUP720 in SSO mode. So basically the procedure is simple:

1. copy new IOS on disk0: and slavedisk0:

2. update boot variable

3. copy run start

4. hw-module module <standby-sup> reset

5. redundancy force-switchover

But the question is: what is the downtime of the network/module when following these steps?

Or is there a better way to upgrade the IOS?

Kind regards,

Christian

[Jayakrishna Mada · Accepted solution]

Hi Christian,

What version are you running currently.

If you are running SXI and later you can do a eFSU which is a hit less upgrade.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/issu_efsu.html

But if you are running any other versions (SXF or SXH) the above mentioned procedure is correct but there will be downtime of 2 or more minutues because at one point both supervisors will be running a different image and will be RPR mode.

Link to upgrade doc which you might already have seen:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a0080a98f3c.shtml

Hope this helps.

JayaKrishna

[Wolfgang Maier]

Thank you for your reply, it helped me out to understand the impact of this procedure. I´ll have to announce a maintenance window probably in the weekend