Lab Objective
The objective of this lab exercise is for you to learn how to configure a Multilink PPP connection.
Lab Purpose:
MLPPP is a feature that will allow you to provide redundancy and some sort of load balancing by using two links (interfaces) and the benefits of the encapsulation protocol of PPP. As a Cisco engineer, as well as in the Cisco CCNA exam, you will be expected to know how to implement MLPPP functionality.
Certification Level:
This lab is suitable for ICND2 and CCNA certification exam preparation.
Lab Difficulty:
This lab has a difficulty rating of 7/10.
Readiness Assessment:
When you are ready for your certification exam, you should complete this lab in no more than 10 minutes.
Lab Topology:
Please use the following topology to complete this lab exercise:
Task 1:
Configure hostnames on R1 and R2 as illustrated in the topology.
Task 2:
Create a Multilink interface on R1 and R2 with the following settings:
- Multilink group: 1
- Encapsulation type: PPP
- IP address: As in the diagram
Task 3:
Configure both Serial interfaces on R1 and R2 to join Multilink group 1.
Task 4:
Make sure that there is reachability between R1 and R2 via the MLPPP interface and that the interface is up and running.
Configuration and Verification
Task 1:
For reference information on configuring hostnames, please refer to earlier labs.
Task 2:
R1#conf t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#int multilink 1 R1(config-if)#encapsulation ppp R1(config-if)#ppp multilink group 1 R1(config-if)#no shutdown R1(config-if)#ip add 192.168.10.1 255.255.255.252 R1(config-if)#end R2(config)#int multilink 1 R2(config-if)#encapsulation ppp R2(config-if)#ppp multilink group 1 R2(config-if)#no shutdown R2(config-if)#ip add 192.168.10.2 255.255.255.252 R2(config-if)#end
Task 3:
R1#config t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#int serial0/0 R1(config-if)#encapsulation ppp R1(config-if)#ppp multilink group 1 R1(config-if)#no shutdown R1(config-if)#exit R1(config)#int serial0/1 R1(config-if)#encapsulation ppp R1(config-if)#ppp multilink group 1 R1(config-if)#no shutdown R1(config-if)#exit R2(config)#int serial0/0 R2(config-if)#encapsulation ppp R2(config-if)#ppp multilink group 1 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#int serial0/1 R2(config-if)#encapsulation ppp R2(config-if)#ppp multilink group 1 R2(config-if)#no shutdown R2(config-if)#exit
Task 4:
R1#sh ip int brief Interface IP-Address OK? Method Status Protocol Serial0/0 unassigned YES unset up up Serial0/1 unassigned YES unset up up Multilink1 192.168.10.1 YES manual up up R2#sh ip int brief Interface IP-Address OK? Method Status Protocol Serial0/0 unassigned YES unset up up Serial0/1 unassigned YES unset up up Multilink1 192.168.10.2 YES manual up up R1#ping 192.168.10.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.10.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 56/67/96 ms