Hi there,

I was wondering what speed  of VC port is necessary if I have 10 Gbps ports as 
traffic ports on a VC with EX4300; would VC ports at 10 Gbps be enough or do I 
need 40 Gbps ports? The 2 switches will be over 100 meters apart from each 
other, so I need to use the uplink module ports to make the VC. But the 
EX4300-32F has also an 40 GbE additional  uplink module, which could be used if 
necessary.

Also, if I need 40 GbE ports to make the VC, do I need single mode fibers to 
cover 100 meters or is multimode sufficient? I found in some documentation that 
with 40 GbE, single mode is necessary for distances over 150 meters: In this 
case I really have to be careful about the measurement of the distance.

Thanks for your thoughts

Regards

Lucio
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