140 Chapter 6: Metro Mobility: Client-Based Mobile IP
Evaluating the Metro Mobility Example
A Mobile Nodes operating in the environment shown in Example 6-1 can have many different
states than those seen in Chapter 4, “IOS Mobile IP in the Lab.” Cisco IOS show commands
can determine the states for the feature presented in the chapter.
To determine whether a Mobile Nodes is using reverse tunneling, look under the routing options
section of the show ip mobile binding command, as follows. If “(T)Reverse-tunnel” is listed,
the Mobile Nodes is using reverse tunneling.
HA#show ip mobile binding
Mobility Binding List:
Total 1
Care-of Addr, Src Addr
Lifetime granted 10:00:00 (36000), remaining 09:40:54
Flags sbdmg-T-, Identification C5C75C51.A5787D48
Tunnel1 src dest reverse-allowed
Routing Options - (T)Reverse-tunnel
The path MTU supported by a tunnel is listed in the output of the show ip mobile tunnel command,
as follows. The configured MTU of the tunnel is listed as “IP MTU.” The discovered MTU is listed
under “Path MTU Discovery”; if this value is 0, the configured value can transit the path.
HA#show ip mobile tunnel
Mobile Tunnels:
Foreign Agent Configuration with UDP Tunneling
hostname FA2
interface Ethernet0/0
ip address
ip mobile foreign-service
interface Ethernet1/0
ip address
ip irdp
ip irdp maxadvertinterval 4
ip irdp minadvertinterval 3
ip irdp holdtime 9
ip mobile foreign-service reverse-tunnel
router mobile
router ospf 1
network area 1
ip mobile foreign-agent care-of Ethernet1/0
ip mobile foreign-agent nat traversal keepalive 20
Example 6-1 Configurations for a Metro Mobility Solution (Continued)

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