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Forum Discussion
Configuring RDMA and RoCE on Netgear M4300-24X24F stack
Good morning all,
I am working on a hyperconverged Hyper-V 2016 environment with Storage SPaces Direct (S2D) on 2 hosts, which requires Remote Direct Memory Acces (RDMA) over Converged Ethernet (RoCE).
We are using 2x of M4300-24X24F, and each host is setup with 2x Mellanox ConnectX-4 2x25Gb cards, giving each host 4x10Gbe connection to the stack.
I have found a nice deployment guide here here, however this is based on Lenovo switches.
In this guide they talk aboud Converged Enhanced Ethernet (CEE), Priority-Based Flow Control (PFC), and Enhanced Transmission Selection (ETS) which are needed.
However, what are the Netgear equivalents for these?
I have found PFC, but cannot find anything regarding the other 2 settings?
Does anyone has any experience with this?
4 Replies
Hi XanderVR
M4300 isn't capable of DCB: in fact, only M6100 offers DCB.
M4300 datasheet: http://www.netgear.com/business/products/switches/managed/m4300.aspx#tab-resources
M6100 datasheet: http://www.netgear.com/business/products/switches/managed/m6100.aspx#tab-resources
The Priority Flow Control (PFC) is standardized by the IEEE 802.1Qbb specification and enables flow control per traffic class on IEEE 802 full-duplex links. The Data Center Bridging Exchange Protocol (DCBX) is used by DCB devices to exchange configuration information with directly connected peers. Enhanced Transmission Selection (ETS) provides an operational model for priority processing and bandwidth allocation for the switch in a DCB environment.
Datasheets commit for features supported by NETGEAR Fully Managed Switch respective platforms and I'm afraid there's no other equivalent for such Lossless Ethernet.
Regards,
So the short answer is: No it is not possible to use RoCE with M4300?
Let me take that back: I think you can use M4300 for RoCE.
Please keep me honnest here, but first I believe RoCE can work either in Lossless Ethernet environments (so, in a network with Global Flow Control enabled, or Priority Flow Control - PFC - implemented), or Lossy Ethernet environments (so, without any Flow control).
In Lossy Ethernet environment, RoCE can be configured in Resilient RoCEv2 mode on server/storage side.
M4300 can certainly be configured for RoCE Lossless Ethernet mode instead, either using standard 802.3x Flow Control, or better, the only feature inherited from M6100, namely Priority Flow Control in order to be able to differentiate between different flows.
PFC is available in M4300 CLI . You can download the CLI manual here http://www.netgear.com/support/product/M4300-24X24F#docs
PFC configuration commands and examples can be found starting page 980. Pleae kindly let us know how it goes. Please follow the configuration flow starting page 980.
Regards,
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