[j-nsp] MX960 with 3 RE's?

[Christopher E. Brown]

It is 120Gbit agg in a SCB system as the limit is 120G/slot.

This is in the form of 30Gbit per TRIO and 1 TRIO per 4 ports.

So, use 3 of 4 in each bank if you want 100% line rate.

SCBE increases this to 160Gbit or better (depending on age of chassis)
allowing for line rate on all 16.


Agree, mixing DPC and MPC is a terrible idea.  Don't like DPC to begin
with, but nobody in their right mind mixes DPCs and MPCs.

On 1/14/16 13:09, Saku Ytti wrote:
> On 14 January 2016 at 23:11, Mark Tinka <mark.tinka at seacom.mu> wrote:
> 
> Hey,
> 
>>> A surplus dealer recommended the MPC-3D-16XGE-SFPP-R-B, which is less
>>> than $1k/port used.  But it only supports full bandwidth on 12 ports,
>>> would be oversubscribed 4:3 if all 16 are in use.  They are Trio chipset.
> 
>> I wouldn't be too concerned about the throughput on this line card. If
>> you hit such an issue, you can easily justify the budget for better line
>> cards.
> 
> Pretty sure it's as wire-rate as MPC1, MPC2 on SCBE system.
> 
> Particularly bad combo would be running with DPCE. Basically any
> MPC+DPCE combo is bad, but at least on MPC1/MPC2 systems you can set
> the fabric to redundancy mode. But with 16XGE+SCB you probably don't
> want to.
> 
> There is some sort of policing/limit on how many fabric grands MPC
> gives up, like if your trio needs 40Gbps of capacity, and is operating
> in normal mode (not redundancy) then it'll give 13.33Gbps of grands to
> each SCB.
> However as DPCE won't use the third one, DPCE could only send at
> 26.66Gbps towards that 40Gbps trio. While MPC would happily send
> 40Gbps to MPC.
> 


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