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80877

January 26th, 2016 12:00

N2048 Stacking Slows down network

We have recently stacked 3 switches using the provided stacking cables and come to realize that our backups are taking double the time to complete when connected to the stack as opposed to a standalone switch both are in the same subnet and not crossing any firewalls... basically going sideways

ideas????

I thought stacking was to improve performance not hinder it

we also notice that thestack is one of our top talkers on that subnet

Moderator

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8.5K Posts

January 26th, 2016 16:00

Hi,

What version is the firmware on the stack? Is there a lot of data being transferred between stack members? It is possible to have more network traffic than the stacking cables can handle.

68 Posts

January 27th, 2016 06:00

Im running 6.2.1.6 on all 3 switches

I do notice that the stack has a lot of spanning tree traffic

Moderator

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8.5K Posts

January 27th, 2016 09:00

I would try updating the firmware,  Spanning-tree traffic could do it, the stacking ports can only handle so much traffic at once. 

68 Posts

February 1st, 2016 10:00

Tried that...still slow

Moderator

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8.5K Posts

February 1st, 2016 11:00

You might be better not having them stacked.

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