Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Core requirement - HELP

Hi all


I recentlydesigned a new core to go into one of our factories, there are over 1500 pc's and devices on site and the business is a 24/7 critical operation.


The design was 2 4507's with redundant sups running VSS.


The other option was to look at putting something like a 3750x stack or 4500X series in, but from a design / scalability point of view the chassis would be my choice. The business want to know the pros and cons of stack vs the expensive chassis.


Can anyone give me some advice on both options and why we should do one not the other ?



Super Bronze

DisclaimerThe Author of this


The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.


Were you planning a routed core or L2 core?  If the former, VSS may decrease reliability, and/or provide worse performance in certain failure situations.

Assuming 4507 VSS supports quad, the 2nd sup per chassis does provide some additional redundancy that the 4500-X VSS would not.  Other than that, the 4507 vs. the 4500-X just gives you the choice of different line cards.  If you really don't need 2nd sup redundancy, and/or the various line card options of the 4500 chassis, the 4500-X might be a better choice.

The 3750X series is weak in the area of port buffering compared to the 4500s.  Whether this might be a problem, depends on various factors.

The 3750X series is also weak in the number of 10g ports it can support, i.e. only two per 3750X.

The 3750X series is probably getting close to end-of-life, because of the 3650 and 3850s.

The 3750X stack, vs. dual 10g between VSS 4500s, offers more bandwidth; i.e. dual 16g, I believe.

The 3750X stack doesn't have some of the internal data flows "quirks" of VSS.

Either 4500 is more industrial strength than a 3750X, and it probably a better "core" device choice except for small networks and where device cost is a prime consideration.