Applications - 2.1 English

Versal ACAP 600G Channelized Multirate Ethernet Subsystem (DCMAC) LogiCORE IP Product Guide (PG369)

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2.1 English
The DCMAC Subsystem is a highly flexible IEEE-designed network interface for applications that require a very high bit rate, such as:
  • Ethernet switches
  • IP routers
  • Data center switches
  • Communications equipment
The capability to interconnect devices at 50, 100, 200, and 400 Gb/s Ethernet rates becomes especially relevant for next-generation data center networks where the following conditions might occur:
  • To keep up with increasing CPU and storage bandwidth, rack or blade servers must support aggregate throughputs faster than 50 Gb/s (single lane) or 100 Gb/s (dual lane) from their Network Interface Card or LAN-on-Motherboard (LOM) networking ports.
  • Given the increased bandwidth to endpoints, uplinks from Top-of-Rack (TOR) or Blade switches need to transition from 100 Gb/s (four lanes) to 400 Gb/s (four lanes) while ideally maintaining the same per-lane breakout capability.
  • Due to the expected adoption of 400GBASE-CR4/KR4/SR4/LR4, SerDes and cabling technologies are already being developed and deployed to support 100 Gb/s per physical lane, twinax cable, or fiber.

In addition to typical Coupled MAC+PCS application for up to six ports (up to 12 ports for 50 Gb/s FEC-only), the DCMAC Subsystem supports MAC client monitoring applications for up to 40 channels.

The DCMAC Subsystem provides support for OIF Flex Ethernet (FlexE) by exposing a channelized MAC interface (MAC I/F) that can be connected to the client side of a FlexE shim. Likewise, the DCMAC Subsystem flex interface (FLEX I/F) provides access to the PHYs and can be connected to the FlexE group side of a FlexE shim. The FlexE shim is implemented in user logic.

The DCMAC Subsystem supports ITU-T Flexible OTN (FlexO) through the FLEX I/F. This provides access to the FEC and lane deskew logic and includes support for additional deskew using alignment buffers in user logic.