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Regarding switches like Mellanox Voltaire VLT-30011 (QDR IB, managed). I see a gigabit ethernet port on the switch which in the manual (http://www.mellanox.com/related-docs/prod_ib_switch_systems/4036_2036_Installation_Manual.pdf) is labeled "for management", but it's also the uplink I take it? My intention is for one of the nodes in my cluster to act as login node, being reachable from the Internet.

I have seen BridgeX switches with "integrated ethernet gateways", but my interpretation of this is that the switch can handle ethernet (protocol) communication internally as well?

Jay
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    Just put an ethernet card into the node that also needs IP. It could also act as a router and you can run IPoIB if required. Some of those switches can run dual protocol ethernet + infiniband. I'm not sure if this is one of those. Talk to your Mellanox rep – hookenz Feb 03 '16 at 02:52

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In VLT-30011 the GigE interface is for management access only.

You need both IPoIB running on all InfiniBand nodes and either a BridgeX gateway or a node with an Ethernet card configured to act as a router as Matt suggested in the comments.

The BridgeX VPI enabled VLT-30037 was probably the closest Voltaire switch to what you are asking for.

Dmitri Chubarov
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