Frame Relay over Cisco Routers

[jeffwingo]

I am in the process of replacing ISDN with Frame Relay to our five remote locations. Here is the breakdown:

Host, Cisco 3640, DLCI 101, 1.54 mb

Remote 1, Cisco 1720, DLCI 102, 256 k
Remote 2, Cisco 3620, DLCI 103, 768 k
Remote 3, Cisco 1720, DLCI 104, 768 k
Remote 4, Cisco 3620, DLCI 105. 768 k

What configurations do I need to put into these devices to make them talk to the host?

What other information do I need?

 

[jamin123]

Divide your VC by your bandwith to config bandwith on the interface. Use frame-relay route for Dyhamic or frame-relay ip map for static to map layer 2 DLCI to the layer 3 IP.

 

[lgarner]

Something like:

interface Serial0
description - Frame-Relay Circuit
bandwidth 1544
no ip address
encapsulation frame-relay
!
interface Serial0.1 point-to-point
description PVC Main-Remote1
bandwidth 768
ip address 10.0.1.5 255.255.255.252
frame-relay interface-dlci xxx
!
interface Serial0.2 point-to-point
description PVC Main-Remote2
bandwidth 768
ip address 10.0.1.9 255.255.255.252
frame-relay interface-dlci xxx
... etc

And on a remote:
interface Serial0
description - Frame-Relay Circuit
bandwidth 768
no ip address
encapsulation frame-relay
!
interface Serial0.1 point-to-point
description PVC Main-Remote1
bandwidth 768
ip address 10.0.1.6 255.255.255.252
frame-relay interface-dlci xxx


Subinterfaces allow for flexibility in the future, even if you only have one PVC now. The "bandwidth" statement is used only for dynamic routing and doesn't affect the speed of the circuit. In a hub-spoke configuration where there's only one way in & out, specifying bandwidth is completely optional. It's nice to have it for the benefit of monitoring progams, though.