network diameter

[christianpho]

Hi !

I would like to know how I should calculated a diameter of a network for spanning-tree ?

thanks a lot !

[JORGE RODRIGUEZ · Accepted solution]

Go over this link which provides ilustrated diagram and calculations performed by default stp timers through the layer 2 footprint.

From what I understand the recommended diamater by ieee on 802.1d is 7 hops.

http://www.cisco.com/warp/public/473/122.html

Rgds

Jorge

[christianpho]

thanks a lot !

[Istvan_Rabai · Accepted solution]

Hi Christian,

For simplicity, the STP network diameter is the highest possible number of switches a frame can go through when travelling across the layer2 network, by touching each switch only once (because the network being loop-free).

For example:

3 switches connected in triangle: the highest number of switches from edge to edge is 3.

Diameter is 3.

Cheers:

Istvan