M6 HyperFlex host with no connectivity to Nexus 9K; Tip for installers

A real show stopper when doing a HyperFlex Edge/No-FI install is the 25G connection between the UCS HyperFlex hosts and the upstream switch, like a Nexus 9K. Here’s how to make it go smoothly.

When connecting Cisco UCS HyperFlex servers with a VIC 1467 interface card to a Nexus 9k, you need to take care that the FEC mode is correct. So after completing the cabling and before you even try to begin your install, check the CIMC via the CIMC UI and look at the External Ethernet Interfaces.  If all interfaces are in a Link down state, as shown below, toggle the FEC mode to CF74 on the connected interfaces.

About RedNectar Chris Welsh

Professional IT Instructor. All things TCP/IP, Cisco or Data Centre
This entry was posted in GNS3 WorkBench. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.