HP-UX Mobile IPv6 A.01.00 Administrator's Guide

Chapter 7

Troubleshooting HP-UX Mobile IPv6

Verifying Common Mobile IPv6 Functions

Verifying the Return Routability Procedure

Use the following procedure to verify the Return Routability procedure between a Mobile Node and

Correspondent Node:

Step 1. Attach a Mobile Node to a foreign network.

Step 2. Allow the Mobile Node to send a Binding Update message to the Home Agent and register from the

foreign network.

Step 3. Use a Correspondent Node to ping the Mobile Node and start the Return Routability procedure.

Step 4. Use the nettl tool on the Home Agent to verify:

• the Mobile Node reverse-tunneled the Home Test Init message to the Home Agent

• the Home Agent forwarded the Home Test Init message to the Correspondent Node

• the Home Agent received the Home Test message sent from the Correspondent Node to the

Mobile Node’s Home Address

• the Home Agent tunnelled the Home Test message to the Mobile Node’s Care-of Address

Step 5. Use the nettl tool on the Correspondent Node to verify:

• the Home Test Init message arrived from the Mobile Node’s Home Address

• the Care-of Test Init message arrived from the Mobile Node’s Care-of Address

• the Correspondent Node sent the Home Test message to the Mobile Node’s Home Address

• the Correspondent Node sent the Care-of Test message to the Mobile Node’s Care-of Address

Verifying Route Optimization

Use the following procedure to verify Route Optimization:

Step 1. Perform the steps in “Verifying the Return Routability Procedure” on page 96.

Step 2. Use mip6admin -bindings [

-l mobile node home address

] to verify the Mobile Node’s binding

cache entry on the Correspondent Node.

• If the Mobile Node’s binding cache entry is on the Correspondent Node, proceed to Step 3.

• If the Mobile Node’s binding cache entry is not on the Correspondent Node, troubleshoot the

Mobile Node’s Binding Update message using mip6admin or nettl.

Step 3. Use the nettl tool to verify the Correspondent Node is communicating directly with the Mobile

Node and by passing the Home Agent.