North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Optical bypass switches (Re: MAE-East still no generator)
> A thought I just had. How many folks have optical bypass switches on > their fddi connections? If a enough providers' equipment fail without > bypassing, the ring can get partitioned into different sections which > might explain some of this. Supposedly DRA's router is plugged into > the gigaswitch, but I don't have a gigaswitch manual to check what > happens with ring partitions. Perhaps we're getting off of the nanog topical area here, but... To the best of my knowledge, the fddi ring at mae-east is a concentrator type ring, a to m / b to m type of thing... instead of a fddi trunk type of ring with a to b and b to a. MFS may have a number of concentrators hanging off of the Gigaswitch. One of the nice things about a concentrated ring, if you will, is that individual ports can come up and down... the ring transitions, but when a node or nodes go down, the ring doesn't partition. One note of humor about optical bypasses... although I've never used them, I'm told they're less reliable than most fddi cards -- they end up breaking and causing more problems then if you lived without them. =-) davec - - - - - - - - - - - - - - - - -
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