System Administration Guide: IP Services

Default Mobile Node

The Address section for a default mobile node contains the Type, SPI, and Pool labels. The Node-Default parameter enables you to permit all mobile nodes to get service if they have the correct SPI (defined in this section). The Address section, using the Node-Default parameter, has the following syntax:

[Address Node-Default]
     Type = Node
     SPI = SPI-identifier
     Pool = pool-identifier

The Node-Default parameter enables you to reduce the size of the configuration file. Otherwise, each mobile node requires its own section. However, the Node-Default parameter does pose a security risk. If a mobile node is no longer trusted for any reason, you need to update the security information on all trusted mobile nodes. This task can be very tedious. However, you can use the Node-Default parameter in networks that consider security risks unimportant.

The following table describes the labels and values that you can use in the Address section for a default mobile node.

Table 29–8 Address Section Labels and Values (Default Mobile Node)






Specifies that the entry is for a mobile node



Specifies the SPI value for the associated entry



Allocates the pool from which an address is assigned to a mobile node

You must have corresponding SPI and Pool sections for the SPI and Pool labels that are defined in the Address section with a default mobile node, as shown in the following figure.

Figure 29–2 Corresponding SPI and Pool Sections for Address Section With a Default Mobile Node

Shows that an SPI of 251 and POOL of 10 correspond to
the same SPI and POOL numbers in the ADDRESS NODE-DEFAULT section.