> > Will auto-neg signal one-way fiber failures (after the link has already > > been brought up and autoneg'ed successfully)? Never tried that. > > Yes, it works much better (and faster) than UDLD. The endpoint which > has lost receive fiber will immediately signal "RemoteFault" to the > other end and line protocol will go down on both sides within miliseconds.
the primary intent of UDLD is detection of mis-cabling at layer-2. e.g. lets say you had three devices, cabled with tx/rx in a triangle. the link may well come up at layer-1 but it sure will do bad bad things at layer-2 particularly with protocols like spanning-tree! UDLD will detect that, autoneg won't. the recommendation would be to use both autoneg (layer-1) and UDLD (layer-2). cheers, lincoln. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
