Solved: 1721 Router Question

thoppenrath · ‎03-28-2008

Hi, I'm new to Cisco h/w and have been self training on reconfiguring a 1721 router with a 1DSU T1 WIC. The router was originally for our internet connection. The left slot has the above WIC the right slot is empty. What I want to do is simply use the router to connect to a seperate network within our facility. My question is, do I need to use a different WIC card and if so, what should I use? THanks.

paolo bevilacqua · ‎03-28-2008

Hi, you only need to connect a a switch that does vlans and configure vlan encap on the fastethernet interfface.

Alternatively you need WIC-1E.

Both solution will allow hosts on the two segments to communicate but NOT at wire-speed,

thing for which you should get a L3 switch, the smaller of these is WS3560-8PC.

Hope this helps, please rate post if it does!

View solution in original post

Collin Clark · ‎03-28-2008

Then the WIC-1ENET should work just fine! Tn IOS you will see a new ethernet interface which you would need to configure and connect to the other site.

View solution in original post

Collin Clark · ‎03-28-2008

What is the connectivity to the other location? Copper, fiber, T1?

thoppenrath · ‎03-28-2008

Sorry, it is copper. (Cat 5e).

Collin Clark · ‎03-28-2008

OK, then Paolo's post is right on, either the WIC-1ENET or you could connect two switches together. The two switches option will give you better performance.

HTH

paolo bevilacqua · ‎03-28-2008

Hi, you only need to connect a a switch that does vlans and configure vlan encap on the fastethernet interfface.

Alternatively you need WIC-1E.

Both solution will allow hosts on the two segments to communicate but NOT at wire-speed,

thing for which you should get a L3 switch, the smaller of these is WS3560-8PC.

Hope this helps, please rate post if it does!

thoppenrath · ‎03-28-2008

We don't have a spare L3 switch but do have the router. When you say " Not at wire speed" is that because the WIC card only supports 10mbps?

Collin Clark · ‎03-28-2008

The switch does not have to be layer 3. You can do layer 2 but you would have to change some routing around which may not be worth it. How much inter-site traffic do you expect?

thoppenrath · ‎03-28-2008

There would be very little traffic through this router.

Collin Clark · ‎03-28-2008

Then the WIC-1ENET should work just fine! Tn IOS you will see a new ethernet interface which you would need to configure and connect to the other site.