Can anyone point me to or tell me how the 'lifetime' works in a prefix announced via Router Advertisement? Is the default lifetime 30 days (that's what I seem to keep seeing)? Also, who (which device) tracks this (router or 'host')? What happens when this 'lifetime' expires (e.g. if tracked by the host, does it send out another RS for a prefix)? etc...
Hi there, The prefix information option sent in an RA is issued by the a router but its state is tracked by the host which receives and configures its preferred address using the defined prefix. When the lifetime expires the address is marked as depreciated and should not be used as the source for future communication, but it should still be used to receive communications on.
Whenever a host receives a RA packet it will update the lifetime timers. However if a prefix expires and the host becomes unreachable it will perform NUD and in the process send out a NS which would initiate a solicated-RA from the router, updating the prefixes lifetime.
Hi there, The prefix information option sent in an RA is issued by the a router but its state is tracked by the host which receives and configures its preferred address using the defined prefix. When the lifetime expires the address is marked as depreciated and should not be used as the source for future communication, but it should still be used to receive communications on.
Whenever a host receives a RA packet it will update the lifetime timers. However if a prefix expires and the host becomes unreachable it will perform NUD and in the process send out a NS which would initiate a solicated-RA from the router, updating the prefixes lifetime.
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