We just got bitten by a serious etherchannel problem : we have an 2 gig etherchannel link between 2 campus. Someone on the other end misconfigured an interface (typed 6/1 instead of 1/6) and had overwritten the allowed vlans on one of the interfaces. As a result of this, the interface was thrown out of the bundle (at that side only) BUT the interface stayed UP. On the other campus, both interfaces stayed in the bundle with very big problems as a result : the 6500 at that side considered both lines as valid and distributed the packets over both interfaces, sending half of the traffic in 'space'.
If the interface had gone down as a result of the unbundling, there would have been no problem. We only use static channel settings, so not etherchannel negotiations between switches. Can this be solved with dynamic etherchannel bundling ? Or someone has another solution for this problem ? Wim Holemans Networkservices University of Antwerp _______________________________________________ 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/