Question - as NVIDIA seems to be lagging and is not stepping up to support this community effort by giving @Eugr access to a Spark (at least one for the nightly builds of the spark-vllm-docker project) should we as a community set up a Gofundme and buy one for him? I’m based in Europe so I don’t re…

@eugr should open a sponsorship on GitHub or a Patriot or something similar.

A switch would be more straightforward, but I want to try a mesh. With 3 sparks you can get direct connection between any of the pairs by utilizing both ports. The downside is that there will be three different subnets.

The playbook is up: Connect Three DGX Spark in a Ring Topology | DGX Spark with an interesting note: In a three node ring topology all four interfaces on each node must be assigned an IP address to form a symmetric cluster

I’m not sure this makes any sense. Why would they need to assign IPs to both “twins” on each port? Also, they assign IPs from the same subnet to both “twins” (which are separate interfaces from the OS standpoint) - this is a bad practice from the networking standpoint and can cause lots of weird iss…

[image] eugr: I’m not sure this makes any sense. Ah, that makes a lot of sense — just to get you and the other experts here to come up with a community solution, as always… ;)

Thank you very much for the replies, I’ll play a bit as soon as I get around to it.

[image] GB10 QSFP56 ports speed ? Connecting multiple GB10 with MIKORTIK CRS804 DDQ DGX Spark / GB10 You want QSFP56-DD to 2x QSFP56 cables. The -DD is double density and it is a deeper physical connector used on the CRS804/ CRS812 (and lots of other switches.)…

Watching progress on a 3-node cluster setup with great interest :)

Not even a question for me - as soon as i see the link - I’m straight up paying Eugr back for all his support! The man earned it more than those @nvidia marketing clankers talking crap.

In a mesh scenerio you’d have to use two ports on spark, from what I understand would drop the speed to 100G on each. ”To achieve 200 Gbps, the CX7 uses multi-host mode aggregating both PCIe x4 links — so both ports are always active together even through a single cable.” ”One cable = 200G (both …

I just caught up to this – wasn’t really browsing forums yesterday. Interesting. You’re right that doesn’t make sense… Maybe they intended for parallelism to still treat it as 2x NCCL/RoCEv2 interfaces even though our cap is still 100G? Although in that case, we’d need to use 6x separate subnets in…

Should we as a community gofundme one Spark for Eugr's nightly builds?

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10

cosinus March 22, 2026, 2:17pm 30

Patrick from ServeTheHome had some recommendations in that thread as they tested Switches with Sparks. A new video will be up shortly with that topic.

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Should we as a community gofundme one Spark for Eugr's nightly builds?

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