NetModule NB3700, User Manual

Page: 69 / 194

NB3700 User Manual 3.8
If MIP is run as a
home agent
, you will have to set up a home address and network
mask for the
home agent
first. Then you will need to add the configuration for all mobile
nodes which is made up of the following settings:
Figure 5.23.: Mobile IP
Parameter Mobile IP Node Configuration
SPI The Security Parameter Index (SPI) identifying the secu-
rity context for the tunnel between the
mobile node
and
the
home agent
. This is used to distinguish mobile nodes
from each other. Therefore each
mobile node
needs to be
assigned a unique SPI. This is a 32-bit hexadecimal value.
Authentication type The used authentication algorithm. This can be prefix-
suffix-md5 (default for mobile IP) or hmac-md5.
Shared secret The shared secret used for authentication of the
mobile
node
at the
home agent
. This can be either a 128-bit hex-
adecimal value or a random length ASCII string.
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