Frame relay design

[dizzzzy]

hello
i want to connect the main bulding with 3 other buildings using frame relay.i have an t3 line for internet(ISP1) and 2 t1 lines for (ISP2)for buckup. My design is the following.

ips1 isp2
| |
| |
-------- ---------
router1 ------- router2
-------- | | ---------
| ----|-----| |
| | | |
-------- | | ----------
switch -----| |-- switch
-------- ----------
i want if anybody can tell me how i will connect this bulding with the other 3 through frame relay cloud.do i need
to connect both routers of main bulding to frame relay cloud
or to buy a new router to connect router1 and router 2 and only router 3 be connected to the frame relay cloud.

thanks in advance

regards
thanasis

 

[lgarner]

If you're using Frame Relay, your internet providers are irrelevant. You have leased lines to the frame relay cloud.

Connecting both routers provides redundancy, but needs two Frame Relay lines to your office. Also, if you use the Internet router, you have to consider all frame relay traffic to be untrusted and keep it on the outside of your firewalls.

You could also use an interlan router behind your firewall for the frame relay. In this case you need to keep all frame relay connections private since if any are outside the firewall, your security is compromised.