Configuring Frame Relay connections between routers involves setting up virtual circuits (PVCs) between the routers and configuring the Frame Relay encapsulation on the serial interfaces. Here's a step-by-step guide for configuring Frame Relay connections between Cisco routers using Cisco IOS commands:
### Topology: ```
Router A (DTE) Router B (DTE) ________________________ ________________________
| | | | | Serial 0/0 | | Serial 0/0 | | IP: 192.168.1.1 | | IP: 192.168.1.2 | | DLCI: 102 | | DLCI: 101 | || || ```
### Router A Configuration:
1. Enter Global Configuration Mode:
```bash RouterA# configure terminal ```
2. Select the Serial Interface:
```bash RouterA(config)# interface serial 0/0 ```
3. Configure Frame Relay Encapsulation:
```bash RouterA(config-if)# encapsulation frame-relay ```
4. Configure DLCI Mapping:
```bash RouterA(config-if)# frame-relay interface-dlci 102 ```
This command associates DLCI 102 with the local router's serial interface.
5. Assign IP Address:
```bash RouterA(config-if)# ip address 192.168.1.1 255.255.255.0 ```
6. Enable the Interface:
```bash RouterA(config-if)# no shutdown ```
### Router B Configuration:
1. Enter Global Configuration Mode:
```bash RouterB# configure terminal ```
2. Select the Serial Interface:
```bash RouterB(config)# interface serial 0/0 ```
3. Configure Frame Relay Encapsulation:
```bash RouterB(config-if)# encapsulation frame-relay ```
4. Configure DLCI Mapping:
```bash RouterB(config-if)# frame-relay interface-dlci 101 ```
This command associates DLCI 101 with the local router's serial interface.
5. Assign IP Address:
```bash RouterB(config-if)# ip address 192.168.1.2 255.255.255.0 ```
6. Enable the Interface:
```bash RouterB(config-if)# no shutdown ```
### Verify Configuration:
You can verify the Frame Relay configuration using the following commands:
- Check the status of the serial interfaces:
```bash show interfaces serial 0/0 ```
- Display Frame Relay information:
```bash show frame-relay pvc ```
- Verify IP connectivity between Router A and Router B using ping:
```bash ping 192.168.1.2 ```
Ensure that you configure consistent DLCI mappings and IP addresses on both routers to establish proper communication over the Frame Relay network. Additionally, troubleshoot any connectivity issues using appropriate show and debug commands if necessary.