[f-nsp] MLXe Slot Bandwidth, Normal v Turbo

[Jörg Kost]

 From MLXe Series Hardware Installation Guide, I can only find 
additional:
> Performance in non Turbo mode:
> No line-rate even with all SFMs installed.

And for the 2x100GbE CFP2:
> Performance is in non turbo mode: No line rate for certain smaller 
> packet sizes (even with all fabrics installed).

There is also a KB article, but it is not so easy to figure the 
calculation  out quickly: 
https://extremeportal.force.com/ExtrArticleDetail?an=000086074

In a practical sense, it already makes me feel not to insert a G1 into a 
  100g machine; it is not worth the trouble.  Instead, I would plan to 
add an extra small switch and connect that from the 10g module to 
support RJ45 and gigabit connections.

Also, when using  X-2 cards right now, you will decrease your routing 
scalability, dropping from the 2 million routes to degraded 768k (with 
IPv6) support.


On 2 Apr 2022, at 9:38, Tim Warnock wrote:

> From the BR-MLX-10GX24-DM doco: " The module can support up to 200Gbps 
> when the system fabric mode is in Turbo mode (i.e. system has only Gen 
> 2 and Gen 3 modules such as 8x10G, 100G or 24x10G modules). The module 
> can support up to 12 10G wire-speed ports when the system fabric mode 
> is in Normal mode (i.e. system also has any Gen 1 modules such as 1G 
> or 4x10G modules)."
>
> I never used one but I believe that makes it 200G/Slot (Turbo) to 
> 120G/Slot (Normal)?
>
> -----Original Message-----
> From: foundry-nsp <foundry-nsp-bounces at puck.nether.net> On Behalf Of 
> Michael Lambert
> Sent: Saturday, 2 April 2022 1:50 AM
> To: foundry-nsp <foundry-nsp at puck.nether.net>
> Subject: [f-nsp] MLXe Slot Bandwidth, Normal v Turbo
>
> We have an MLXe with high-speed switch fabric modules. At the moment 
> it’s running in Turbo mode with only Gen2 line cards (10 and 100 
> GbE). Since the claim is that the box does full line rate, each slot 
> must perform at least at 200 Gb/s full-duplex in this mode. If we put 
> a Gen1 card (BR-MLX-1GCx24-X) into the box, and reboot into Normal 
> mode, what does this do to the per-slot bandwidth? We haven’t been 
> able to track down any numbers (and we don’t have an SE to ask).
>
> Thanks,
>