> Lets say that the link between H1 and H2 goes down: > > +------------------------------------------+ > | | > +-->|H1|<--- / --->|H2|<---------->|H3|<--+ > eth0 eth1 eth0 eth1 eth0 eth1 > > H1 will now observe that the test packets it sends on eth1, is not > received in eth0, meaninf that the ring is open Hi Allan Is H1 the only device sending test packets? It is assumed that H2 and H3 will forward them? Or does each device send test packets, and when it stops hearing these packets from a neighbour, it assumes the link is open? Andrew