[j-nsp] EX3200 Interface Strangeness

[Mark Tinka]

On Monday 17 August 2009 10:52:28 pm Brendan Mannella wrote:

> What happens if a 10g card is installed? Do you lose the
> last two ports?

The 10Gbps uplink module (EX-UM-2XFP) does not share the 
same ASIC as the last 4 built-in ports on this platform. As 
such, you don't get taxed.

As we've seen, the 1Gbps uplink module (EX-UM-4SFP) shares 
the same ASIC as the last 4 built-in ports, hence, the tax.

> And is this behavior the same on the 4200?

No, it only affects the EX3200.

The same goes for if you install SFP+ uplink modules (EX-
UM-4SFP) and run them in 1Gbps mode.

We've asked our SE to ask Juniper to fix this by having a 
1Gbps uplink module that implements its own ASIC. Suffice it 
to say, your guess is as good as mine as to if this will 
happen, as it could very well be a feature :-).

Cheers,

Mark.
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