12-11-2009 08:10 AM - edited 03-06-2019 08:55 AM
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
12-12-2009 02:03 AM
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 :-
Regards,
Varun
12-12-2009 03:08 AM
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
12-15-2009 12:53 PM
thanks
i will look into ISSU.
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