Howto setup LACP between Cisco Nexus and Mellanox

Infrastructure & Networking Switches and Gateways
1

I have been able to setup an LACP connection between an Arista switch and a Mellanox SN2100 using a QSFP twinax cable. That works well. I have also setup LACP on my Cisco Nexus by creating a Cisco “Port-Channel” which bonds multiple ports together. For other gear that has worked. However, it doesn’t work between Mellanox and Nexus.

I have a breakout cable, and SFP connections on both sides that are recognized. Addtionally, I am able to get a single 10 Gb link to work using the cable, just not a bonded LACP connection at 40 Gb. When I establish it, Cisco shuts the ports down do to “FlapError” as the ports come up and down multiple times.

Has anyone else been succesful doing this? If so, how?

2

Hi Russ,

We already resolved this issue under case #00622088.

Resolution -

  1. We first split the port 1/15 to 4 logical ports

  2. Configured the speed to 10G

  3. Added the ports to port channel 15.

  4. Verified the links are UP and we see the traffic.

Thanks,

Pratik Pande