I have a 100G edge-core 7712-32X switch running Cumulus 6.3.1.
I want to attach some servers with 10G interfaces and have configured swp50-3 for that. Example:
With a breakout DAC cable (100G QSFP to 4 x SFP+) I thought I could connect to a 10G port. However, looking at the interface with ethtool:
$ ethtool swp5s0
Settings for swp5s0:
Supported ports: [ FIBRE ]
Supported link modes: 25000baseCR/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: BaseR
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Link detected: no
Do you have any ideas how I might fix this so I can get 10G ports on that?
$ ifup swp5s0
cmd '/sbin/ethtool -s swp5s0 speed 10000' failed: returned 255 (Cannot set new settings: Operation not suppd
not setting speed
Thanks ahead of time for any ideas that might come to mind!