> I need Babel to be able to update nodes at least 2 hops away of a missing node > in less than 1 second. Is it possible? How do I do it?
> I'm already running babeld with the folowing options; -h 0.5 -H 0.5 What happens if you reduce the smoothing time constant (-M)? What happens if you reduce the hello interval further (you can go down to 0.02, although I wouldn't recommend anything below 0.05). > But when a node disappears the information takes aroud five seconds The issue here is that a single lost hello doesn't indicate the node is dead -- it merely indicates that we lost a packet. Babel will wait up to 10 lost packets before it gives up on a node. In the "good" case, the other node is strong enough so that doesn't happen, but if the new node is not very good, ETX and smoothing will delay the switching. 5 seconds means 3 seconds for ETX and 2 seconds for smoothing, which is what I'd expect with a hello interval of 0.5. > A <=> B <=> C > > when C dissapears, A takes around 5 seconds to notice it. Although if the C > node comes back and connects to B, A detects it pretty fast. Yes, that's quite typical of ETX convergence. -- Juliusz _______________________________________________ Babel-users mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/babel-users
