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qsfp+ SR4 distances when splitted into 4x10GBaseSR ifs

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Hi,

 

I'm getting a little confused with max distances with qfx qsfp+.

 

QFX-QSFP+-40GbaseSR4 are given for distance of 100m over om3 mmf, 150m over om4 MMF.

I get it that we can configure the QSFP+  as a 40G unique channel or as 4 separate 10GbaseSR interfaces.

 

Simple question :

when split to 4x10GBaseSR separate interfaces,

-1/ does the max distances stated for QFX-QSFP+-40GbaseSR4 (100m@om3, 150m@om4) remain the max distances available on each 10GbaseSR interface ?

-2/ ... or does the max distance becomes the same as a native SFP+ 10GBaseSR interface (300m@om3, 400m@om4).

Not talking about the ESR4 qsfp+ here, just the basic SR4 qsfp+.

 

Juniper representative told me 1/ was correct.

Cisco told me 2/ was correct (on their boxes...).

So... who's right and who's wrong ...?

 

Pascal


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