Forward Error Correction modes supported when deploying at 25G on Cisco 93180

[jdclay]

All,

We are looking to deploy a pair of r10600 LTM on the enterprise network at 25G, connecting uplink interfaces to a 93180YC-FX.

In order to connect at 25G on the 93180, we must enable FEC on both ends. The Cisco's default mode FC-FEC CL74, and also supports CONS16-RS-FEC and IEEE-RS-FEC.

Does anyone know what modes of FEC are supported by F5 (rSeries, VELOS, iSeries) for LTM? I only see enabled and AUTO as options, but not what modes are supported.

[Paulius]

@jdclay This might be what you're looking for.

https://my.f5.com/manage/s/article/K42021374

You can try setting the Cisco side to auto for FEC to see what it negotiates as or if it is even able to negotiate FEC properly.

[JRahm · Accepted solution]

Hi @jdclay, got an authoritative answer on this:

"VELOS and rSeries only support RS FEC IEEE on 25G interfaces. Adjacent network devices must be configured with this FEC mode"

So if you configure the Cisco side as IEEE-RS-FEC you should be good to go.