I am planning for a site that will have 4 T1 lines. We want to route these 4 seperate T1 lines independently to seperate VLANs. That way we dedicate each T1 to a different group of users as needed. How do I go about setting up the router in this case? I'm planning to use a 2801 with 2 dual T1 cards. I also want to use the public IP blocks on the sub interfaces of ethernet interfaces. Can this be achieved with route-maps on the sub-interfaces?
The first thing I recommend you do is hire a reputable IT company that knows something about networking.
You don't really say whats on the other end, but I would simply break your public IPs into 4 blocks, and route down each public IP range down one T1 at the upstream site (assuming you are doing this already).
If you want to balance outbound traffic too instead of defaulting out all 4 T1 links, then yes, you'd want to setup route-maps to policy route each packet with such and such source IP out the proper T1 link.
It should be fairly straightforward to proceed just as you think.
The first thing I recommend you do is hire a reputable therapist.
Thanks for the reply.
The router will connect to layer 2 switches which will be patched to various meeting rooms. Some clients request access to a full T1 to themselves so we want to be able to patch them into a VLAN that gives them exclusive access to one of the 4 T1s.
My confusion lies in the default routes.
For instance:
ip route 0.0.0.0 0.0.0.0 207.1.1.1 ip route 0.0.0.0 0.0.0.0 207.1.1.5 ip route 0.0.0.0 0.0.0.0 207.1.1.9 ip route 0.0.0.0 0.0.0.0 207.1.1.13
This would load balance all 4 T1s as I understand it. However, this is not what we want.
I was thinking I could use an ip policy route-map statement on each sub-interface to send traffic to the appropriate serial.
For instance:
interface fastethernet0/0.1 ip address 208.1.1.0 255.255.255.0 ip policy route-map wan1 ! interface fastethernet0/0.2 ip address 208.1.2.0 255.255.255.0 ip policy route-map wan2 ! interface fastethernet0/0.3 ip address 208.1.3.0 255.255.255.0 ip policy route-map wan3 ! interface fastethernet0/0.4 ip address 208.1.4.0 255.255.255.0 ip policy route-map wan4 ! ! route-map wan1 permit 10 set ip next-hop 207.1.1.1 ! route-map wan2 permit 10 set ip next-hop 207.1.1.5 ! route-map wan3 permit 10 set ip next-hop 207.1.1.9 ! route-map wan4 permit 10 set ip next-hop 207.1.1.13 !
Would this work as I expect with no default routes specified? Obviously I ommitted the VLAN commands from this example. I want to nail this down first. Does this make sense?
Hmmmm.....you're not the first one to suggest that, maybe I should look into it. Thanks.
Thats true, and also true.
....
Nope, that should do it. With policy routing, as long as you cover all your cases, you don't need a default route.
Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.