ios version

[Sun Flower]

i stack to 2 cisco 3750 switchs.  i used show version command to see the ios version.

one switch,s version is 12.1(14r) another one is 12.2(25r). Is it okey or is it problem???

[InayathUlla Sharieff]

Hi Selenge,

Its not recommended and you would have problems.

Ref:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/troubleshooting/switch_stacks.html

Fixing Incompatible Cisco IOS Versions and Switch-Stack Protocol Versions

A new switch might not join a stack when Cisco IOS versions or stack protocol versions differ. Review these points about Cisco IOS versions and stack protocol versions:

•Switches with the same Cisco IOS version also have the same stack protocol version and are compatible in the same switch stack.

•Switches with the same Cisco IOS version as the stack master can join the stack.

•Switches with different Cisco IOS versions can have different stack protocol versions.

•Switches with the same Cisco IOS version but different major version numbers are incompatible and cannot function in the same switch stack.

Regards

Inayath

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[Sun Flower]

is it possible to become same ios version?

[InayathUlla Sharieff]

Hi,

Yes you can do:--

Here is the info:

– A mixed software stack with only Catalyst 3750-X, only Catalyst 3750-E, or only Catalyst 3750

switches supporting different features as stack members.

For example, a Catalyst 3750-E-only stack with some members running the IP base feature set,

other members running the IP services feature set, and the remaining members running the IP

services feature set.

– A mixed hardware and software stack with Catalyst 3750-X, Catalyst 3750-E, and

Catalyst 3750 switches supporting different features as stack members.

For example, a stack with the Catalyst 3750-E members running the IP services feature set and

the Catalyst 3750 members running the IP services software image

But as per experience which we have seen that it doesnt go well. Hence we always recommend customer to run the same software on all the switches on the stack.

HTH

Regards

Inayath

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[Sun Flower]

how to change ios version to become same ?

[InayathUlla Sharieff]

Selenge,

You need to upgrade the switch the one which is not on the latest.

Plz see the below thread on upgrading the firmware on stack:

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

https://supportforums.cisco.com/message/3933664#3933664

https://supportforums.cisco.com/message/608518#608518

HTH

Regards

Inayath

*Plz rate the usefull posts and mark this thread as answered if this has solved this issue.

[InayathUlla Sharieff]

Selenge,

Is there anything else I can help you with on this? Or plz mark this thread and closed and answered.

Rgards

Inayath.

[Leo Laohoo]

version is 12.1(14r) another one is 12.2(25r).

Hold on ... These two are not IOS versions.  These two are BOOTSTRAP.

Post the outputs to the command "sh version".