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3750X stacking with 3750 ??

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jfitz at princeton

Oct 12, 2011, 5:56 AM

Post #1 of 10 (795 views)
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3750X stacking with 3750 ??

Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?

I have heard both Yes and No from Cisco ?

Thanks for any info.

Jeff Fitzwater
OIT Network & Telecommunications Systems
Princeton University
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javier at cisco

Oct 12, 2011, 6:06 AM

Post #2 of 10 (789 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

On Oct 12, 2011, at 8:56 AM, Jeffrey G. Fitzwater wrote:

> Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?
>
>
> I have heard both Yes and No from Cisco ?

Please refer to the following:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/qa_c67-578933.html

Search for "are mixed stacks supported?" within the above document.

-jav

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dwbielawa at liberty

Oct 12, 2011, 6:10 AM

Post #3 of 10 (790 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

If you go into configuration mode, and then do a "switch <number> provision ?" command, it will show you what models, are currently supported for stacking, on your current code.

Thank You

Daniel Bielawa
Network Engineer
Liberty University Network Services

(434)592-7987

LIBERTY UNIVERSITY
40 Years of Training Champions for Christ: 1971-2011

-----Original Message-----
From: cisco-nsp-bounces [at] puck [mailto:cisco-nsp-bounces [at] puck] On Behalf Of Javier Henderson
Sent: Wednesday, October 12, 2011 9:06 AM
To: Jeffrey G. Fitzwater
Cc: cisco-nsp [at] puck
Subject: Re: [c-nsp] 3750X stacking with 3750 ??

On Oct 12, 2011, at 8:56 AM, Jeffrey G. Fitzwater wrote:

> Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?
>
>
> I have heard both Yes and No from Cisco ?

Please refer to the following:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/qa_c67-578933.html

Search for "are mixed stacks supported?" within the above document.

-jav

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jeff-kell at utc

Oct 12, 2011, 7:06 AM

Post #4 of 10 (796 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

On 10/12/2011 8:56 AM, Jeffrey G. Fitzwater wrote:
> Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?
>

A 3750X "LAN Base" image cannot stack with anything (other than another
3750X LAN Base image switch).

A 3750X "IP Base" or "IP Services" will stack with 3750/3750E, with the
usual caveat that the ring will default to the least common denominator
(32G for 3750, 64G for 3750E).

The 3750X "LAN base" is not even recognized with 3750/3750E stacks, at
least up through 12.2(55)

Jeff
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nick at foobar

Oct 12, 2011, 7:24 AM

Post #5 of 10 (781 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

On 12/10/2011 13:56, Jeffrey G. Fitzwater wrote:
> Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?
>
> I have heard both Yes and No from Cisco ?

> http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/data_sheet_c78-584733.html

The answer is yes, but... you need to be careful to run the same version of
software with a compatible license. In practice, this means that you will
need to use at least the IP Base license on the -X switch.

Also, you may need to check whether running multiple -x switches in a stack
with other 3750s will disable stackpower completely.

Nick

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jfitz at princeton

Oct 12, 2011, 8:07 AM

Post #6 of 10 (780 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

Here is a doc with caveat to all of this� and we have the 12S and so buying an X won't work.

* The 3750-X Fiber switches (WS-C3750X-12S and WS-C3750X-24S) don't stack with the old WS-C3750G-12S switches due to
HW and SW limitations on the WS-C3750G-12S.
� 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.

Jeff

Thanks to all for info.

On Oct 12, 2011, at 10:24 , Nick Hilliard wrote:

On 12/10/2011 13:56, Jeffrey G. Fitzwater wrote:
Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?

I have heard both Yes and No from Cisco ?

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/data_sheet_c78-584733.html

The answer is yes, but... you need to be careful to run the same version of
software with a compatible license. In practice, this means that you will
need to use at least the IP Base license on the -X switch.

Also, you may need to check whether running multiple -x switches in a stack
with other 3750s will disable stackpower completely.

Nick

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lists at hojmark

Oct 12, 2011, 8:14 AM

Post #7 of 10 (782 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

On Wed, 12 Oct 2011 12:56:28 +0000, you wrote:

> Does anybody know that absolute answer, if a 3750X can or
> cannot stack with a 3750 or 3750E ?

Can.

If you stack 3750-X with -X og -E, it will run StackWise Plus. If you
stack with 3750, it will only run StackWise.

See
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps5023/prod_white_paper09186a00801b096a.html

-A

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joshuaatterbury at gmail

Oct 12, 2011, 1:38 PM

Post #8 of 10 (803 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

Hi Jeff,

I recently stacked 3750x-48pf-s running ip base with 3750v2-24. I originally attempted to use 12.2(55) but the stack failed to initialize, almost like the stack ports on the 3750x were err-disabling.

After some hair pulling I downgraded to 12.2(53) ( lowest version supported by both) and it did a full EEPROM rewrite on the 3750x. The stacking worked properly after that.

So the short of it is try to test the code in the lab first and not during the change window :)

Sent from my iPad

On 12/10/2011, at 10:56 PM, "Jeffrey G. Fitzwater" <jfitz [at] princeton> wrote:

> Does anybody know that absolute answer, if a 3750X can or cannot stack with a 3750 or 3750E ?
>
>
> I have heard both Yes and No from Cisco ?
>
>
> Thanks for any info.
>
>
>
> Jeff Fitzwater
> OIT Network & Telecommunications Systems
> Princeton University
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

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petelists at templin

Oct 12, 2011, 2:30 PM

Post #9 of 10 (774 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

On 10/12/11 9:06 AM, Jeff Kell wrote:

> A 3750X "IP Base" or "IP Services" will stack with 3750/3750E, with the
> usual caveat that the ring will default to the least common denominator
> (32G for 3750, 64G for 3750E).

And that a mixed-platform stack will operate in legacy mode, i.e. no
local switching, every packet will go all the way around the ring,
bidirectional rings won't see optimal directionalization.

pt

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dwcarder at wisc

Oct 12, 2011, 3:06 PM

Post #10 of 10 (782 views)
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Re: 3750X stacking with 3750 ?? [In reply to]

Thus spake Pete Templin (petelists [at] templin) on Wed, Oct 12, 2011 at 04:30:05PM -0500:
> On 10/12/11 9:06 AM, Jeff Kell wrote:
>
> >A 3750X "IP Base" or "IP Services" will stack with 3750/3750E, with the
> >usual caveat that the ring will default to the least common denominator
> >(32G for 3750, 64G for 3750E).
>
> And that a mixed-platform stack will operate in legacy mode, i.e. no
> local switching, every packet will go all the way around the ring,
> bidirectional rings won't see optimal directionalization.

Can you point me to documentation on this? I thought the E/X series
would still do local switching before frames hit the ring asic.

Dale
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