[j-nsp] Stackable switches, looping stacking ports

[joel jaeggli]

On 4/9/13 11:15 AM, Tom Storey wrote:
> Hey all.
>
> A colleague of mine tells me that, if you have a single stackable switch
> (not in a stack obviously) and do not loop the two stacking ports on the
> back using the stacking cable that comes in the box, then you reduce the
> effective throughput of the switch.
The ex4200's asic has a capacity of 136Gb/s from the front panel ports 
which is 100% of line rate across all ports. I don't imagine connecting 
the asic back to itself is that useful or usable topology.
>
> Specifically I am talking about an EX4200.
>
> To me this sounds a bit odd, and is not in line with my perhaps rudimentary
> understanding of stackable switches, so hoping someone here can clarify
> whether looping the stacking ports is good/bad/necessary/unnecessary?
>
> Thanks.
> Tom
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