GSR 12810

Unanswered Question
Feb 1st, 2009


<p>From the data sheet I can see that 12810 supports 40G/slot. Does that mean it 40G full duplex or 80G full duplex. If its only 40G full duplex, how can we get a switching capacity of 800Gbps for the system (40 X 10 = 400Gbps only)?</p>

<p>If its a 80G full duplex, it should support a line card of 4 X 10GE, right? But Cisco has not released any 40G  (single or 4 X 10GE) interfaces for 12810 or 12816. Any specific reason? Even SIP-601 supports only 10G.</p>

<p>Customers say Cisco claims 40G/slot on 12800 but there are no line cards or SIP to support this claim.</p>



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I have this problem too.
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Giuseppe Larosa Mon, 02/02/2009 - 06:19

Hello Prakash,

the numbers used to define a chassis capacity are the result of summing tx and rx capacities.

All vendors do so and when we focus on a technical point of view this fact becomes clear.

In addition to first note: a GSR has a non blocking switching crossbar so the capacity of the fabric is superior to that of single linecards (and this is indeed a good point to avoid internal bottlenecks)

So the current linecards don't include a real 40 GE capable linecard and you are right about this.

Hope to help



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