Lab 3.5.3 – Troubleshooting Frame Relay (Answers)
Topology Diagram
Addressing Table
Device | Interface | IP Address | Subnet Mask | Default Gateway |
---|---|---|---|---|
R1 | Lo0 | 172.18.11.254 | 255.255.255.0 | N/A |
S0/0/0 | 172.18.221.1 | 255.255.255.252 | N/A | |
R2 | Lo0 | 172.18.111.254 | 255.255.255.0 | N/A |
S0/0/1 | 172.18.221.2 | 255.255.255.252 | N/A |
Learning Objectives
Practice Frame Relay troubleshooting skills.
Scenario
In this lab, you will practice troubleshooting a misconfigured Frame Relay environment. Load or have your instructor load the configurations below into your routers. Locate and repair all errors in the configurations and establish end-to-end connectivity. Your final configuration should match the topology diagram and addressing table. All passwords are set to cisco except the enable secret password which is set to class.
Task 1: Prepare the Network
Step 1: Cable a network that is similar to the one in the topology diagram.
Step 2: Clear any existing configurations on the routers.
Step 3: Import the configurations.
Router 1
! hostname R1 ! enable secret class ! no ip domain lookup ! ! ! ! interface Loopback0 ip address 172.18.11.254 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/1 no ip address shutdown no fair-queue clockrate 125000 ! interface Serial0/0/0 ip address 172.18.221.1 255.255.255.252 encapsulation frame-relay frame-relay map ip 172.18.221.2 678 broadcast frame-relay map ip 172.18.221.2 182 broadcast ! The DLCI is mistyped and needs to be corrected for connectivity. frame-relay map ip 172.18.221.1 182 ! A Frame Relay map for the interface IP address is often overlooked, ! because most other types of interfaces can reach their own address. no frame-relay inverse-arp no shutdown ! router eigrp 1 network 172.18.221.0 network 172.18.11.0 no auto-summary ! ! ! line con 0 password cisco logging synchronous line aux 0 line vty 0 4 password cisco login ! end
Router 2
! hostname R2 ! enable secret class ! no ip domain lookup ! interface Loopback0 ip address 172.18.111.254 255.255.255.0 ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 no ip address shutdown no fair-queue ! interface Serial0/0/1 ip address 172.18.221.2 255.255.255.252 encapsulation frame-relay clockrate 125000 frame-relay map ip 172.18.221.1 181 broadcast ! The broadcast keyword was forgotten. Without the broadcast keyword, ! multicast packets are not sent with this DLCI. This prevents ! EIGRP from forming adjacencies. frame-relay map ip 172.18.221.2 181 ! A Frame Relay map for the interface IP address is often overlooked, ! because most other types of interfaces can reach their own address. no frame-relay inverse-arp frame-relay lmi-type ansi ! The Frame Relay switch is using the default LMI type, which is ! cisco. This command must be removed for the link to work. no shutdown ! It is common to forget that interfaces on a router ! are shutdown by default. ! router eigrp 1 network 172.18.221.0 network 172.18.111.0 no auto-summary ! ! ! line con 0 password cisco logging synchronous line aux 0 line vty 0 4 login ! end FR-Switch: ! hostname FR-Switch ! ! enable secret class ! ! ! no ip domain lookup frame-relay switching ! ! ! ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 no ip address encapsulation frame-relay no fair-queue clockrate 125000 frame-relay intf-type dce frame-relay route 182 interface Serial0/0/1 181 no shutdown ! interface Serial0/0/1 no ip address clockrate 125000 encapsulation frame-relay frame-relay intf-type dce frame-relay route 181 interface Serial0/0/1 182 ! Without a route statement, the Frame Relay switch does not know how ! to switch the Frame Relay packets. no shutdown ! ! ! ! line con 0 password cisco logging synchronous line aux 0 line vty 0 4 password cisco login ! end
Task 2: Troubleshoot and Repair the Frame Relay Connection Between R1 and R2.
Task 3: Document the Router Configurations
On each router, issue the show run command and capture the configurations.
Task 4: Clean Up
Erase the configurations and reload the routers. Disconnect and store the cabling. For PC hosts that are normally connected to other networks, such as the school LAN or to the Internet, reconnect the appropriate cabling and restore the TCP/IP settings.