Adding to existing C3750 a New Member with different IOS (K9)

Unanswered Question
May 21st, 2010

Hi,


We have 2 C3750 with High profile customers with SLA of 99.5%,so we try not to have any downtime for them.Adding new memebr to existing one` with new complete different features to existing basci without any K9 feautres-and ,in the end we have to ugrade all 3 of them to K9 level, so what are the smarter way of upgrding them in order,so the downtime for the customer is very few mins .?


Thanks

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Ganesh Hariharan Fri, 05/21/2010 - 23:35


Hi,


We have 2 C3750 with High profile customers with SLA of 99.5%,so we try not to have any downtime for them.Adding new memebr to existing one` with new complete different features to existing basci without any K9 feautres-and ,in the end we have to ugrade all 3 of them to K9 level, so what are the smarter way of upgrding them in order,so the downtime for the customer is very few mins .?


Thanks

Hi,



All of your stack members really should be running the same version of IOS (even though there’s a chance that if the versions are close enough the stack might still work).


1)Log into your stack. (You’ll be logged into the master). Do show stack to find out how many switches are in the stack, and which one is the master. Let’s say there are four switches and the master is 4.


2)Use copy tftp flash: and answer the prompts to get your IOS up there.


3)You can do dir flash: to see that the new IOS is there. When you refer to “flash:”, you are always referring to the master. You can also refer to a particular stack member’s flash like this: dir flash2:. So on this stack, where 4 is the master, dir flash: and dir flash4: will look the same.


4)Now get that IOS image onto the other switches in the stack. You can either tftp it to each in turn with copy tftp flash1: and so on, or use copy flash4: flash1:. The copy method is only a little quicker, but it works.


Check out the below link for step by step procedure to upgrade switches in stack


http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00804799d7.shtml


Hope to Help !!


Ganesh.H


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