stackwise connection method

[tedauction]

Hello, when I have a pair of switches operating as a stack, documentation tells me to connect the two in a crossover fashion i.e. port 1 of the top switch to port 2 of the bottom switch and vice versa.

What is the actual advantage of doing this rather than connecting port 1 to 1 and port 2 to 2 ?

Thank you.

[Mark Malone]

Hi its so in large stacks  you can create the full loop for full redundency  like below screenshot

[Joseph W. Doherty · Accepted solution]

As far a I know (for operation or performance), none.

However, the cross over method of connecting switches lends it self to "neat" stack wiring as the stack grows. I.e. 1 to 2 from top to bottom and then top switch's 2 to bottom switch's 1 (using the 50 CM cable).

[Joseph W. Doherty]

Oh, I might add, if you have a multi-unit stack, and don't have the long stack cable, you can use the interleave method, where you might connect port 1 to port 1 and port 2 to port 2.

For example, for a stack of four, numbered from 1 to 4, top to bottom, 1:1<>2:1, 1:2<>3:2, 2:2<>4:4 and 3:1<>4:1.

The interleave method might also be used with long stack cables and stack members on different racks.

Again, what stack ports connect to what stack ports doesn't really matter. What matters is ideally forming a stack ring.

[paul driver]

Hello

Just like to add we use the interweave method, it proves most useful with short cabling

res
Paul