N+1 means one more than that required. Suppose you have a large switch which can operate half the blade capacity with one power supply and it requires 2 power supplies to operate fully populated. Then, when it is half-populated, dual power supplies provides N+1, because it has one more than the requirement. When fully populated, it has N+1 if it has 3 power supplies in place and available.
This is the kind of HA requirement typically demanded by telcos and others for whom off-line is simply not an option. HTH Annlee ""Lo Ching"" wrote in message news:[EMAIL PROTECTED] > Dear All, > > What's the meaning of N+1 redundancy? I found a chassis switch with 4 power > supply and it states N+1 power redundancy. > > Thanks. > > rgds, > Lo Ching Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72213&t=72202 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
