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Kevin M. Conde
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‎07-02-2008 07:42 PM

‎07-02-2008 07:42 PM

Setting up Layer 3 VLAN routing

We have three physically separated locations. We just connected them via an AT&T CSME or Opt-E-Man. It’s fiber, but what AT&T provides is a port on an AT&T owned HP Switch in the MPOE. We then plug our switches into the AT&T switch.

We have several VLANS on each switch: Default, 100, 103, 108, 111, 120

We’ve made the connection between sites by connecting ports tagged for all VLANS on our switches to the AT&T switches. The issue is AT&T. They limit the number of MAC addresses on each of the Opt-E-Man ports.

To prevent AT&T from seeing all the MACs on each side of the Opt-E-Man we need to set the switches to route all the VLANS on layer 3. Then all AT&T sees are the MACs of the three connected switch ports.

This is new territory for us, but probably very simple to others. Can anyone provide an example of how this is set up? We have HP Procurve 2650’s at the two remote sites and an HP Procurve 5304xl at the main location. The default gateway for all the VLANS is on a SonicWall NSA E-6500 at the main site. Each VLAN has a physical port on the SonicWall. VLAN 108 is passing VOIP traffic.

It’s working, however we have too many MAC addresses for AT&T – they can solve the issue, it just cost 5 bucks a month for each additional MAC.

Thanks,

K Conde
Sutter County Schools
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