If traffic entering and exiting the fabric already has CoS markings (known as 802.1P, or dot1p), then we should either preserve them or modify them. In this recipe, we will instruct the fabric to preserve the settings.
- Navigate to
Fabric
|Access Policies
. - Expand
Global Policies
and selectQOS Class Policies
:
- In the workspace, select the option to
Preserve COS
:
- Click on
Submit
in the bottom right-hand corner.
The ACI fabric will now preserve the 802.1P markings on traffic.
Beneath this setting, you can see three different levels, which are the user-defined classes which we will discuss next.