CISCO 3750 Switch Stack

I have a below cisco 48 ports 3750 switch in branch office and would required to get more ports. Planning to buy one more switch. Existing switch run with below IPservevices SW image. I have below doubts

1. Do I need to purchase same 48 port switch to configure stack or can configure with one 24 and 48 ports together (Hardware need to be identical)?

2. IOS in new switch required to be same (C3750-IPSERVICESK9-M) or IPBASE will be fine (IOS need to be identical)?

Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
*    1   52     WS-C3750G-48PS     12.2(37)SE              C3750-IPSERVICESK9-M
sumod_jacobSenior IT ManagerAsked:
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BigPapaGottiCommented:
You have the ability to stack a 48 port switch with a 24 port switch (see link below):

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00807811ad.shtml

For both of your switches you will need to ensure they both run the same feature set of the IOS. So for the new switch you will be purchasing you will need to ensure it runs the IPSERVICE feature set.

https://supportforums.cisco.com/thread/2048561
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sumod_jacobSenior IT ManagerAuthor Commented:
Alternatively, if i want to trunk between switches possible if new switch IOS is IPbase?
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sumod_jacobSenior IT ManagerAuthor Commented:
SW version can be different in both switches?
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InteraXCommented:
Hi guys.

I would like to disagree with some of the comments made previously. Below is the output of a sh ver from a 3750 stack I have running.

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 12    WS-C3750G-12S      12.2(50)SE            C3750-IPSERVICESK9-M
     2 12    WS-C3750G-12S      12.2(50)SE            C3750-IPSERVICESK9-M
     3 12    WS-C3750G-12S      12.2(50)SE            C3750-IPBASEK9-M
     4 12    WS-C3750G-12S      12.2(50)SE            C3750-IPBASEK9-M
     5 52    WS-C3750G-48TS     12.2(50)SE            C3750-IPBASEK9-M
     6 52    WS-C3750G-48TS     12.2(50)SE            C3750-IPBASEK9-M

As you can see, you can mix and match IPSERVICES and IPBASE in the same stack. This is working fine and is supported by Cisco.

You can also mix and match the different models between all the 3750 ranges, eg. 3750, 3750E and 3750X. What will happen is that if you have an original 3750 in the stack, the stacking links will clock down to the lowest version of stackwise supported by all switches.

I'm not sure if you can use a unified image on the newer switches with the IPSERVICES software, but Cisco are still producing the IPBASE and IPSERVICES images for the newer switches.

The only requirement is that all switches in the stack MUST be running the same release of software, in the above example 12.2(50)SE.
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InteraXCommented:
Oh, also, please find below the sh ver of a second stack I have which mixes different versions of 3750 hardware.

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
     1 18    WS-C3750X-12S      12.2(55)SE7           C3750E-IPBASEK9-M
*    2 12    WS-C3750G-12S      12.2(55)SE7           C3750-IPBASEK9-M
     3 54    WS-C3750X-48P      12.2(55)SE7           C3750E-IPBASEK9-M
     4 54    WS-C3750X-48P      12.2(55)SE7           C3750E-IPBASEK9-M
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BigPapaGottiCommented:
Thanks for chiming in InteraX. Looks like you are able mix and match IPBASE images along with IPSERVICE Images, with all of the SW Versions being the same.
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sumod_jacobSenior IT ManagerAuthor Commented:
This switch is going to be the core switch in branch office. Is there any restriction stack can't be configured on the core switch?.
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InteraXCommented:
There's no reason why the stack could be the core of a network. Even the IP base has routing protocol support.
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sumod_jacobSenior IT ManagerAuthor Commented:
Below I see in my current switch when I run sh switch and sh switch Neighbors. I believe its configured with Stack and ready to accept stack member switch. I have ordered 3750 24 ports switch with IP base IOS on it, and two stack cables. What exactly the next step to add member switch to this master stack switch?.

#sh switch
Switch/Stack Mac Address : 001b.9080.6500
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 001b.9080.6500     10     0       Ready

#sh switch neighbors
  Switch #    Port 1       Port 2
  --------    ------       ------
      1        None          None
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InteraXCommented:
The next step, once you've received the new switch is to make sure they have matching IOS versions. The you can configure the new switch to stack number 2. Once you've done that, connect the stacking cables and then finally, power up the new switch.
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sumod_jacobSenior IT ManagerAuthor Commented:
Hope this is the only command required in new switch before connecting

switch stack-member-number priority new-priority-value
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sumod_jacobSenior IT ManagerAuthor Commented:
I have a doubt about Power stack. Does it also configure in master switch before plugging the stack cables and power on member switch?..
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