topic Re: RDMA support in Technical Discussions

RDMA support

Maryam — Mon, 15 Dec 2025 07:47:16 GMT

Does Extreme 7520 series support RDMA and NVMe over fabric ??

Re: RDMA support

Yoann_Jonard — Wed, 17 Dec 2025 11:00:11 GMT

Neither these protocols nor the RFC associated with them are mentioned in the release notes or the user guide, so I would say no unfortunately.

Re: RDMA support

WillyHe — Thu, 18 Dec 2025 10:24:50 GMT

Hello,

Following link explains how RDMA can work https://www.digitalocean.com/community/conceptual-articles/rdma-high-performance-networking

There are tree options

Specific switches designed to support RDMA.
"Normal" switches in a vlan RDMA-L2 support (so also SPBM setups).
"Normal" switches RDMA-L3 support (so also SPBM setups).

All solutions have their pros and cons, read the article.

Hope it helps

regards
WillyHe

Re: RDMA support

JamieR — Thu, 18 Dec 2025 20:55:48 GMT

Hi Maryam

As pointed out below, RDMA does have options that could be used on any ethernet network (as does NVMe). However others require underlying capabilities at the ethernet level for optimal performance such as Priority Flow Control (PFC) which the Fabric Engine products do not currently support (see https://extreme-networks.my.site.com/ExtrArticleDetail?an=000099793). The specific requirements you are looking to achieve and the details of your deployment may be something that your Extreme account team would be best suited to discuss.

Re: RDMA support

WillyHe — Mon, 22 Dec 2025 10:38:01 GMT

Hello,

As I understand it well, L2 is not supported but L3 is supported.

Does this mean, a L3 subnet (vlan) must be local to an SPBM switch or SPBM-SMLT cluster?

regards

WillyHe