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Max number of switches

By garner3825 ·
Is there a limitation to the maximum number of switches that can be in a network using spanning tree protocol? Assume that all the switches in the network are attached to a single router and only one port of the router. If there is a limitation where can I find information stating it?

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Max number of switches

by NetTek In reply to Max number of switches

In general, the only purpose of the spanning tree protocol is so that if switches or bridges are set in parallel to each other in order to create redundancy, they do not send data in an infinite loop because each switch sees the other as the route to its destination. The spanning tree protocol uses a BPDU (Bridge Protocol Data Unit) that allows each switch to become identifiable to other switches as being parallel. The MAC address of the switch is what is used to create a BPDU.

Now to answer your question. A switch has a finite # of MAC addresses it can store in its routing tables. The maximim number of switches therefore depends upon maximum # of MAC addresses that the switch can store, and what you have on your network. Anything with a MAC addresses that is on your network and uses that particular switch to get to its destination, whether it be switches, computers, printers, servers, or the LAN port on your router, will be stored in the switch.

Your manufacturer will be ableto tell you this. For example, we have a 3Com 3300 switch that I believe will store 8000 MAC addresses.

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Max number of switches

by garner3825 In reply to Max number of switches

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Max number of switches

by garner3825 In reply to Max number of switches

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