Collin Clark Mon, 12/08/2008 - 12:54
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From the datasheet-

Configurable up to 12,000 MAC addresses (Cisco Catalyst 3750G-24TS, 3750G-24WS, 3750G-24T, 3750G-12S, 3750-24TS, 3750-24FS, 3750-24PS, 3750-48TS, 3750-48PS, 3750G-24TS-1U, 3750G-24PS, 3750G-48TS, 3750G-48PS, and 3750G-16TD)

Hope that helps.

Jon Marshall Mon, 12/08/2008 - 12:58
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To add to Collin's post, also depends on the SDM template you use -

MAC Addresses

• Desktop Default SDM template: 6K

• Desktop Routing SDM template: 3K Desktop VLAN SDM template: 12K

• Aggregator Default SDM template: 6K Aggregator Routing SDM template: 6K

• Aggregator VLAN SDM template: 12K

• WS-C3750G-12S Aggregator VLAN SDM template: 20K

Full link -

L2 performance table near the bottom.


yuchenglai Mon, 12/08/2008 - 13:11
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Think I have found a way to get this figure. Please confirm that this is the correct way.

At the end of a "show mac address-table" output is:

Total Mac Addresses for this criterion: 2074

The end of a "show mac address-table" output is:

Total Mac Address Space Available: 3456

Adding the two figures above yields 5530

Would this be one way to find out the maximum number of mac addresses a 3750 switch can support?

Collin Clark Mon, 12/08/2008 - 13:37
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You're probably using the default SDM template which is 6K (per Jon). show sdm prefer will show you what template you're using.

Hope that helps.


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