Chapter 4


1:

Draw a basic Mobile IP topology.

A1:

Answer:

2:

Which command enables the Mobile IP process on a router?

A2:

Answer: The router mobile command enables the Mobile IP process on a router.

3:

What are virtual networks and why are they used?

A3:

Answer: Virtual networks commonly support nodes that never physically come home. Virtual networks are expressed as a network number and mask. Similar to a loopback interface, a virtual network is always up and not susceptible to physical failures, thereby ensuring higher availability.

4:

Give an example of a basic Home Agent configuration with the following features: Home Agent address 192.168.1.2, virtual network 192.168.100.0/24, and Mobile Node 192.168.100.10 residing on the virtual network. Don't forget to include the Mobile-Home security association.

A4:

Answer:

 hostname HA ! interface Ethernet0/0  ip address 192.168.1.2 255.255.255.0 ! router mobile ! ip mobile home-agent ip mobile virtual-network 192.168.100.0 255.255.255.0 ip mobile host 192.168.100.10 virtual-network 192.168.100.0 255.255.255.0 ip mobile secure host 192.168.100.10 spi 100 key hex 1234567890abcdef1234567890abcdef ! end 

5:

Give an example of a FA configuration with the following features: FA address 192.168.3.2 and CoA 192.168.5.1 on Ethernet 1/0.

A5:

Answer:

 hostname FA1 ! interface Ethernet0/0  ip address 192.168.3.2 255.255.255.0 ! interface Ethernet1/0  ip address 192.168.5.1 255.255.255.0  ip mobile foreign-service ! router mobile ! ip mobile foreign-agent care-of Ethernet1/0 ! end 

6:

Give an example of an IOS Mobile Networks configuration with Home Agent 192.168.1.2 and Home Address 169.254.255.1.

A6:

Answer:

 hostname MN ! interface Loopback0  ip address 192.168.100.10 255.255.255.255 ! interface Ethernet0/0  ip address 169.254.255.1 255.255.255.0  ip mobile router-service roam ! router mobile ! ip mobile secure home-agent 192.168.1.2 spi 100 key hex 1234567890abcdef1234567890abcdef ! end 

7:

A router can serve as a Home Agent and FA at the same time.

  1. True

  2. False

A7:

Answer: True. One Mobile Node's Home Network can often be another node's visited network. In this case, you would want a single router to run both Home Agent and FA services.

8:

Configuration of security associations for IOS Mobile IP is always done from the perspective of the agent that is to use that security association.

  1. True

  2. False

A8:

Answer: True. For example, the ip mobile secure foreign-agent\'85 command configures an HA-FA security association on the Home Agent. If the same command were configured on the Mobile Node, it would imply an MN-FA security association.

9:

List two commands that are useful for troubleshooting on the Home Agent.

A9:

Answer: The show ip mobile binding and show ip mobile host commands are useful for troubleshooting on the Home Agent.

10:

Name a command that is useful for troubleshooting on the FA.

A10:

Answer: The show ip mobile visitor command is useful for troubleshooting on the Foreign Agent.



    Mobile IP Technology and Applications
    Mobile IP Technology and Applications
    ISBN: 158705132X
    EAN: 2147483647
    Year: 2005
    Pages: 124

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