Setup Guide

98 Dell EMC PowerEdge MX SmartFabric Configuration and Troubleshooting Guide
Toggle AutoNeg dialog box
12.5.2 Set uplink ports to administratively up
The uplink ports on the switch might be administratively down. Enabling the uplink ports can be carried out
from the OME-M console. The uplink ports can be administratively down when a port group breakout
happens, especially for FC breakouts.
The OME-M console can be used to disable/enable the ports on MX switches. The following steps illustrate
turning setting the administrative state on ports 41 and 42 of an MX9116n.
1. From switch management page, choose Hardware > Port Information.
2. Select the ports. In this example, ports 1/1/41 and port 1/1/42 are selected.
3. Click Toggle Admin State > Finish.
Toggle Administrative port state
12.5.3 Verify MTU size
It is recommended to keep the same MTU size on ports connecting MX switches and the ports on the
upstream switches and server NICs. To set the MTU size from the OME-M console, see Section 7.2
.
12.5.4 Verify auto negotiation settings on upstream switches
Verify the auto negotiation settings on the upstream switches. In case of where auto negotiation settings are
modified, the links might not come up. Change the auto negotiation on upstream switches to resolve the
issue.
For example, if the auto negotiation was disabled on the Cisco Nexus upstream switches, the setting can be
turned on. To enable the auto-negotiation on an ethernet interface on Cisco Nexus switches, follow the below
steps:
switch# configure terminal
switch(config)# interface ethernet interface-number
switch(config-if)# negotiate auto