4507 Dual Sup Upgrade

Marcin Zgola · ‎12-11-2009

I have done many upgrades on 6500 and 7600 with dual sups.

Last night i did an upgrade for 4507 with Sup II plus.

I upgraded then reloaded the standby first, but when i switch the redundancy to upgraded standby the whole thing went down for about 2 minutes.

Have i done something wrong?

is 4507 with dual sups not capable of doing in-service upgrades?

any help or suggestions much approciated.

thanks

CCIE 18676

vvasisth · ‎12-12-2009

if you dont want downtime while upgrading dual sup on 4500 try ISSU this will give you min

imum downtime i guess 200ms of downtime. refer to the link given below :-

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps4324/prod_white_paper0900aecd805e6a95.html

Regards,

Varun

glen.grant · ‎12-12-2009

Check to see how redundancy is set ,if its RPR mode then it will take considreably longer than SSO mode . Either the config was never set as SSO or you have mismatched IOS versions in the supervisors which will only run in RPR if the versions do not match . If in RPR mode all ports will reset which causes spanning tree and other functions to runn which is probably what you saw and the corrresponding interuption . SSO is the way to go !!!

https://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/46sg/configuration/guide/RPR.html

Marcin Zgola · ‎12-15-2009

thanks

i will look into ISSU.

CCIE 18676