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Using Routers And VLANS Over AT&T's Opt-E-Man

I have 2 sites on AT&T's Opt-E-Man. Presently, they are connected via a Cisco 6509 at the main data center to AT&T's Cisco 3560 then to the cloud. At the remote sites, AT&T's Cisco 3650 hands it off to a Cisco 3570 and on to the users. The problem with this setup is that AT&T has a 50 MAC address per site limit so we have to pay extra every month for any number over that. A router will show up as just one MAC address to AT&T. Also, I have Packeteer PacketShapers that I can't use without a router.
What I want to do is connect them all with a Cisco 3640 at each site and a Cisco 7204 at the main site using FastEthernet ports.
This is all I can get from AT&T on the subject:

Cisco routers that support 802.1q:
The following configuration is required by any Cisco Systems, Inc. router running IOS software and attempting to use a routed interface to connect to a Layer2 vlan interface.

Interface Fastethernet 1/0.100
Encapsulation dot1q 2 (vlan 2 is configured for this sub interface)
Ip address 10.1.1.1 255.255.255.252

Interface Fastethernet 1/0.200
Encapsulation dot1q 5 (vlan 5 is configured for this sub interface)
Ip address 10.1.1.2 255.255.255.252

I've also heard that VLANs over IP unnumbered subinterfaces is a possibility, but I can't quite grasp the concept.

Thanks in advance for your time.

SOLUTION

Don Johnston

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dbarr57

ASKER

Because AT&T has a 50 MAC address per site limit so we have to pay extra every month for any number over that. A router will show up as just one MAC address to AT&T. Also, I have Packeteer PacketShapers that I can't use without a router.

SOLUTION

Don Johnston

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ASKER CERTIFIED SOLUTION

Les Moore

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dbarr57

ASKER

Thanks everyone. I understand, but let's pretend my life is at stake and I have to use the 7204 and 3640s.

The 7204 is at one site on VLAN 1, a 3640 is at another site on VLAN 2 and a 3640 is at a 3rd site on VLAN 5. Each has a link into the Metro Ethernet cloud.

For starters, do I make sub-interfaces on each router and give it an IP address like so:
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f1/0
Router(config-if)# int f1/0.2
Router(config-subif)#encapsulation dot1Q 2
Router(config-subif)#ip add 10.1.1.2 255.255.255.252
Router(config-if)# int f1/0.5
Router(config-subif)#encapsulation dot1Q 5
Router(config-subif)#ip add 10.1.2.2 255.255.255.252
Router(config-subif)#

Am I on the right track?

SOLUTION

Don Johnston

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dbarr57

ASKER

According to AT&T, they are trunking dot1q and otherwise passing any and all traffic and VLANs.

SOLUTION

Don Johnston

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