Dell Networking OS10 S5200 or S4148U port does not come up due to wrong port group profile
Summary: Plugged known good cable and transceiver but port does not come up. Verified that the port is in no shutdown. Why does the port not come up?
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Instructions
Switch Models
S4148U
S5200
Software version
OS10
How to change the Port-Group Mode
Port group might not be configured to negotiate at the specified speed.
| Commands | Description |
|---|---|
show port-group |
This shows all port-groups and how they are currently configured. |
Notates the port-group number to modify
We are looking for Port 56.
Example from S5200:
OS10# show port-group
Port-group Mode Ports FEM
port-group1/1/1 Eth 25g-4x 1 2 3 4 -
port-group1/1/2 Eth 10g-4x 5 6 7 8 -
port-group1/1/3 Eth 10g-4x 9 10 11 12 -
port-group1/1/4 Eth 10g-4x 13 14 15 16 -
port-group1/1/5 Eth 25g-4x 17 18 19 20 -
port-group1/1/6 Eth 25g-4x 21 22 23 24 -
port-group1/1/7 Eth 25g-4x 25 26 27 28 -
port-group1/1/8 Eth 25g-4x 29 30 31 32 -
port-group1/1/9 Eth 25g-4x 33 34 35 36 -
port-group1/1/10 Eth 10g-4x 37 38 39 40 -
port-group1/1/11 Eth 25g-4x 41 42 43 44 -
port-group1/1/12 Eth 25g-4x 45 46 47 48 -
port-group1/1/13 Eth 40g-2x 49 50 -
port-group1/1/14 Eth 40g-2x 51 52 -
port-group1/1/15 Eth 100g-1x 53 -
port-group1/1/16 Eth 100g-1x 54 -
port-group1/1/17 Eth 100g-1x 55 -
port-group1/1/18 Eth 100g-1x 56 -
Example from S4148U:
OS10# show port-group Port-group Mode Ports FEM port-group1/1/1 Eth 10g-4x 1 2 3 4 - port-group1/1/2 FC 16g-2x 5 6 7 8 - port-group1/1/3 FC 16g-2x 9 10 11 12 - port-group1/1/4 FC 16g-2x 13 14 15 16 - port-group1/1/5 FC 16g-2x 17 18 19 20 - port-group1/1/6 Eth 10g-4x 21 22 23 24 - port-group1/1/7 Eth 100g-1x 25 - port-group1/1/8 Eth 40g-1x 26 - port-group1/1/9 Eth 100g-1x 29 - port-group1/1/10 Eth 40g-1x 30 -
Example:
| Commands | Description |
|---|---|
OS10# show port-group |
This shows all port-groups and how they are currently configured. |
OS10(config)# port-group 1/1/18 |
Choose the port that you are wanting to modify |
OS10(conf-pg-1/1/18)# mode eth 40g-1x |
Specify the speed that you want to set the port |
Confirmation:
<165>1 2019-09-11T23:21:00.470567+00:00 S5248F-ON-U24 dn_ifm 852 - - Node.1-Unit.1:PRI [event], Dell EMC (OS10) %IFM_ASTATE_UP: Interface admin state up :ethernet1/1/56:1
Verify the port-group has changed:
OS10# show port-group
Port-group Mode Ports FEM
port-group1/1/1 Eth 25g-4x 1 2 3 4 -
port-group1/1/2 Eth 10g-4x 5 6 7 8 -
port-group1/1/3 Eth 10g-4x 9 10 11 12 -
port-group1/1/4 Eth 10g-4x 13 14 15 16 -
port-group1/1/5 Eth 25g-4x 17 18 19 20 -
port-group1/1/6 Eth 25g-4x 21 22 23 24 -
port-group1/1/7 Eth 25g-4x 25 26 27 28 -
port-group1/1/8 Eth 25g-4x 29 30 31 32 -
port-group1/1/9 Eth 25g-4x 33 34 35 36 -
port-group1/1/10 Eth 10g-4x 37 38 39 40 -
port-group1/1/11 Eth 25g-4x 41 42 43 44 -
port-group1/1/12 Eth 25g-4x 45 46 47 48 -
port-group1/1/13 Eth 40g-2x 49 50 -
port-group1/1/14 Eth 40g-2x 51 52 -
port-group1/1/15 Eth 100g-1x 53 -
port-group1/1/16 Eth 100g-1x 54 -
port-group1/1/17 Eth 100g-1x 55 -
port-group1/1/18 Eth 40g-1x 56 -
Software Fix
Operating as designed
Affected Products
PowerSwitch S4112F-ON/S4112T-ON, PowerSwitch S4148F-ON/S4148T-ON/S4148FE-ON, PowerSwitch S4148U-ON, PowerSwitch S5212F-ON, PowerSwitch S5224F-ON, PowerSwitch S5248F-ONArticle Properties
Article Number: 000128222
Article Type: How To
Last Modified: 26 Nov 2025
Version: 8
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