Brocade Inter Switch Links

Brocade 3900 and 12000 support Inter Switch Links   ISL's.

These links provide Very High Speed communications between Brocade Switches.


 These Links are used in groups of 1 to 4.

 One ISL provides no load balancing
 Two ISl's load balance between them
 Three ISl's load balance between them
 Four ISl's load balance between them

 Four ISl's is the max per group but you can have as many
 groups as you want, but the Software operates on groups
 of four.

 These    ISL's   auto configure when you plug
 them in and so there is no user configuration involved.
 

ISL link speeds line up as follows:


 1 link  2 Gig 
 2 links  4 Gig 
 3 links  6 Gig 
 4 links  8 Gig 
 

These ISL links are usually wired between Common Quads.
That is ports 0-4 on one switch blade would connect to ports 0-4 on another switch blade.