I don't consider this a big issue, but what about ARPing at it? I bet even machines that are set to not respond to ICMP echo will still usually answer an ARP. Moreover, if they respond once, I'd think it's probably safe to assume they will continue to do so. So if something never responds to an ARP, it could just timeout after five minutes of inactivity like it does now. If it responds to an ARP once, we could periodially check that it still does -- if it goes silent, assume it's gone.
-- Murphy On Thursday, May 05, 2011 06:03:24 PM kk yap wrote: > Yeah, hosttracker simply timeout. To the best of my knowledge, there is no > good way to ensure the host is there or not if it is completely silent. > You can try sending an icmp echo request but that is not guaranteed to > work all the time either. > > Regards > KK > > On 5 May 2011 17:40, Murphy McCauley <[email protected]> wrote: > > Maybe take a look at hosttracker. It raises events when a host is first > > seen, > > moves, or is lost. I don't think it actively checks for the host -- I > > think > > it just has like a five minute timer where if it doesn't see any packets > > from a > > host, it assumes it is gone. > > > > -- Murphy > > > > On Thursday, May 05, 2011 06:43:00 AM karim torkmen wrote: > > > Hi, > > > Is there any component allowing to detect when a host detaches from > > > the network (e.g. host failure). > > > Unfortunately, the authenticator is able just to detect when a new host > > > joins the network. > > > Thanks a lot, > > > Karim > > > _______________________________________________ > > > nox-dev mailing list > > > [email protected] > > > http://noxrepo.org/mailman/listinfo/nox-dev > > > > _______________________________________________ > > nox-dev mailing list > > [email protected] > > http://noxrepo.org/mailman/listinfo/nox-dev _______________________________________________ nox-dev mailing list [email protected] http://noxrepo.org/mailman/listinfo/nox-dev
