Hi, > RA's are not the same as DHCP, there's no such thing as a "lease time". > What there is, is preferred and valid lifetimes. What should happen is > that when old address is about to go away, the address for that prefix > on the network adaptor should have its preferred lifetime set to zero, > and dnsmasq will then notice that and send RA's with the preferred > lifetime also set to zero.
I meant the life time, it was just a typo somehow :-) The idea here was to send preferred_lifetime=0 in RAs for prefixes that disappeared from the interface to "inform" the clients that they are no longer useable (my provider does not route old prefixes after a reconnect with PPP). Currently you have to set the lifetime very low (which produces more traffic on the wire) or manually delete or switch on/off the network adaptors once the router reconnects or the prefix changes for some reason. My proposal is to keep a list of "previous prefixes" from the constructor:ethX code and also send those prefixes, but with lifetime=0 to inform all client to no longer use that address. Those 0-lifetime RAs should be sent at least for the length of the original lifetime. Radvd has code to handle this (although it’s a bit buggy). Uwe _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
