After the Cloud Foundation bring-up process, you can use the Uplink screen in the SDDC Manager to review and update the uplink connectivity settings. The uplinks are used by the top-of-rack (ToR) switches to carry traffic to your corporate network.


Not every feature that the ToR switches support can be configured using the SDDC Manager Dashboard. You must manually set advanced switch features during installation of the physical rack. Examples of these advanced switch features are spanning tree parameters, redundancy features using Hot Standby Router Protocol (HSRP), and so on.

The ToR uplink settings are entered during the bring-up process. The ToR uplink connectivity can be either L2 or L3 to the upstream network. After the bring-up process, you use this screen to change the settings that were previously entered.


You cannot use this screen to change the uplink type, from L2 to L3 or L3 to L2.


If you plan to change the uplink settings, connect to port 48 on the management switch and log in to SDDC Manager using that connection.


Changing the settings triggers uplink reconfiguration on the switches. Because the reconfiguration process might take a few minutes to complete, connectivity to the corporate network might be lost during the process. To avoid losing connectivity with SDDC Manager, it is strongly recommended that you are connected to port 48 on the management switch when updating the settings using this screen.


  1. In the SDDC Manager Dashboard, navigate to Settings > NETWORK SETTINGS > UPLINK.
  2. Review the current uplink settings.



    Uplink Type

    This field indicates whether the current ToR uplink uses L2 or L3 settings. Read-only.

    Uplink LAG Enabled

    Specify whether to enable link aggregation (LAG), YES or NO.

    Uplink Ports

    Specify the ToR switch ports that are cabled as the uplink to your corporate network. Ports must be in the ranges:

    • 43 to 46, for uplink speeds less than 40Gbps

    • 51 to 54, for a 40Gps uplink speed

    • When LAG is not enabled, the ToR switch uplink uses one port number in the valid range.

    • When LAG is enabled, the ToR switch uplink can use up to four ports. Typically the number of switch ports in the uplink is related to the required bandwidth.

    Uplink IP

    For an L3 uplink, this field displays the starting IP used for the L3 uplink.

    Mask IP

    For an L3 uplink, this field displays the netmask used for the L3 uplink.

    Next-hop IP

    For an L3 uplink, this field displays the IP address used for the next hop IP.

    Uplink Speed

    This field displays the uplink speed in Gbps.

  3. Click Edit to update the settings.

    When you edit the settings, you click Save Edits to save your changes.