Can we Stack a 3750G-12S-S switch with a 3750E-24TD-S switch ????

Answered Question
Apr 23rd, 2012

hello all

Can we stack a 3750G-12S-S switch with a 3750-E-24TD-S switch and if it's possible please guide me ??? and what is the best IOS ???

thank you

I have this problem too.
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Correct Answer by Leo Laohoo about 1 year 11 months ago

Yes you can.

If your 3750G-12 has a flash size of 16 mb then the highest IOS you can use is 12.2(55)SE and later (SE1, SE2, SE3, SE4, SE5 with SE5 being the latest).

As what Reza has provided, the entire stack should be running the same IOS and the same feature set.

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Average Rating: 5 (3 ratings)
Reza Sharifi Mon, 04/23/2012 - 06:49

Hi,

Yes, you can stack 3750G with 3750E as long as you are running the same exact IOS with the same feature set.

From the Q&A doc:

Q. Can I run Cisco Catalyst 3750 switches with Cisco Catalyst 3750-E switches in the same stack?

A. Yes, the two series are compatible. When the Cisco Catalyst 3750-E  Series detects a non-E-Series Cisco Catalyst 3750, it will negotiate  down from StackWise Plus mode to StackWise mode. Thus, the entire stack  will now run in the original StackWise mode.

have a look:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps7077/prod_qas0900aecd805bbea5.html

HTH

Correct Answer
Leo Laohoo Mon, 04/23/2012 - 15:39

Yes you can.

If your 3750G-12 has a flash size of 16 mb then the highest IOS you can use is 12.2(55)SE and later (SE1, SE2, SE3, SE4, SE5 with SE5 being the latest).

As what Reza has provided, the entire stack should be running the same IOS and the same feature set.

krahmani323 Mon, 04/23/2012 - 15:57

Hello friends,

I would also pay attention to the default SDM template the 3750G-12S is coming with =>

=============================================

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/troubleshooting/switch_stacks.html#wp57649

Fixing SDM Template Configuration Incompatibilities (Catalyst 3750G-12S Switches.

The master switch automatically corrects SDM template mismatches in Catalyst 3750 and 3750E switches when you connect one of them to a stack.

A configuration mismatch might occur if the switch was a Catalyst 3750G-12S switch configured with a nondefault SDM template before you connect it to a stack.

To display the configured SDM template on a switch, enter the show sdm prefer privileged EXEC command.

To change a Catalyst 3750G-12S switch SDM template to the default setting before you connect it to a stack, enter the sdm prefer default global configuration command. 

"or no sdm prefer, then sdm prefer ...."

=============================================

Regards.

Karim

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