Patton electronic 29XX manual Configuring IP routing with a Frame Relay Link

Access Server Administrators’ Reference Guide C • Technical Reference

Configuring IP routing with a Frame Relay Link

As each properly configured DLCI will have an IP address representing the next hop on that link, the access server can use a Frame Relay link to access many remote networks. The IP address of the Frame Relay link is unnumbered and specifies the next hop to another router. As such, it is a single-host route with a mask of 255.255.255.255. By using the access server’s routing table, you can apply any number of network routes to use the Frame Relay link. You can even use a PVC as the default gateway (0.0.0.0).

Do the following to access the IP routing table in the access server:

1.Click on IP under the Configuration Menu to display the IP window (see figure 75 on page 187).

2.Click on Routing Info.

When the Frame Relay link (DLMI) and a DLCI is in the UP state, its IP address and interface, will appear in the IP Routing table. The IP address of the PVC will not appear in the IP routing table if the Frame Relay link is down, or the DLCI is not configured or inactive.

Figure 131. IP routing with Frame Relay example

In figure 131, the Frame Relay link shows the address of 192.168.1.3. As IP routing dictates the best fit for any forwarding decisions, any destination with this address will automatically be sent across the Frame Relay link.

A network route using the Frame Relay link as its next hop is also shown in figure 131. The destination of 192.168.1.0 255.255.255.255 specifies the gateway, or next-hop, of 192.168.1.3. With this entry, any IP packet with the destination address in the range of 192.168.1.1- 192.168.1.254 will automatically be sent down the Frame Relay link to the device with the IP address of 192.168.1.3.

Adding a route. To add a route, do the following:

1.To access the IP routing table in the access server, click on IP under the Configuration Menu to display the IP window (see figure 75 on page 187).

2.Click on Routing Info.

Note To add a network route, use the second set of entry items which allow for a destination, mask and gateway:

Configuring Frame Relay 321