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detect
when MH moved to new IP subnet, triggers new
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registration
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two
primary mechanisms, others MAY be used:
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n |
algorithm
1 based on lifetime in agent advertisement:
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MH
records lifetime, updates it with every advertisement
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upon
expiration, assume that contact with agent is lost
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register
with an agent for which advertisement was received and
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whose
lifetime is not yet expired
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n |
algorithm
2 uses network prefixes
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compare
newly received agent advertisements with network
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prefix
of currently used care-of address
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if
prefixes differ, assume that MH moved
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upon
expiration of current registration, MH MAY choose to
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register
with new FA
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