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7 - 4 Aironet 340 Series Bridge<br />

Set up the Agent Parameters (Setup)<br />

This menu lets you configure the parameters that control the operation<br />

of the agents.<br />

Configuration Mobile-IP Setup Menu<br />

Option Value Description<br />

1 - Lifetime [ 600 ] - Max Registration Lifetime<br />

2 - ReplayProt [ timestamps ] - Replay Protection Method<br />

3 - Broadcasts [ off ] - Broadcast Forwarding<br />

4 - RegRequired [ on ] - Registration Required<br />

5 - HostRedirects [ off ] - Enable ICMP Host Redirects to MN<br />

Enter an option number or name, "=" main menu, previous menu<br />

><br />

The Lifetime parameter has two functions. It is the maximum amount of<br />

time the Home Agent will grant a mobile no<strong>de</strong> to be registered on a foreign<br />

network before renewing its registration. Note that the lifetime a<br />

mobile no<strong>de</strong> asks for during the registration process may be more or less<br />

than this value. However, the Home Agent will only grant a lifetime up<br />

to this value.<br />

The lifetime value is also placed in the agent advertisement packets.<br />

mobile o<strong>de</strong>s typically use this field from the advertisements to generate<br />

the Lifetime value for the Registration Request.<br />

The ReplayProt option <strong>de</strong>termines the scheme used to prevent attacks<br />

based on capturing packets and playing them back at a later time. Two<br />

replay protection methods are allowed in Mobile IP: timestamps (mandatory)<br />

and nonces (optional). Due to a patent that may apply to noncebased<br />

replay protection, we do not sup<strong>port</strong> nonces at this time. This<br />

value must be set to timestamps.<br />

The Broadcasts option <strong>de</strong>termines whether mobile no<strong>de</strong>s are allowed to<br />

request that broadcasts from their home network are forwar<strong>de</strong>d via tunneling<br />

to the mobile no<strong>de</strong>. Some protocols require broadcast packets<br />

from the home network to maintain proper operation (i.e., NetBIOS).<br />

Unless nee<strong>de</strong>d, this option should be left at the <strong>de</strong>fault value of off to<br />

avoid unnecessary traffic.<br />

If the RegRequired is off, mobile no<strong>de</strong>s are allowed the option of registering<br />

to a Home Agent without the use of a Foreign Agent via a colocated<br />

care-of-address dynamically acquired while on the foreign net-

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