Calculating up-link bandwidth requirements between switches

[matthew.norman]

Hello all,

Is anyone able to advise if there is a standard or recommended calculation for working out how much bandwidth/speed you need between two connected switches.

For example a stack of 3 48 port gb switches to a another stack of 2 48 port gb switches?

I understand the method of calculating the stack back plane requirements but not the switch to switch connections themselves.

Appreciate any help.

Matt

[Reza Sharifi · Accepted solution]

Hi Matt,

There is no standard or spesific document stating how much bandwidth needed for uplinks. It really depends to your environment and the applications you are using.  Usually one or 2 10Gig uplinks are sufficient per switch or even per stack of 2 or 3 switches. So, in your case you can create a Portchannel between the stacks and put 2 10Gig in it.  In the future if you need more bandwidth you can add more physical interfaces to the Portchannel very easily without any downtime.

HTH