# Configure Ports

Configuration > Interfaces > Configure Ports

Default CoS is the Class of Service value for the packets that do not have a CoS value in their headers when the packet arrives at this interface.

Trust State defines the basis of the DSCP value of the packet at the end of classification.

ACL Base determines when the packet arriving should be classified as being based on port or VLAN.

To view the definition for a particular MIB variable, click the appropriate link from the following list:

- QoS Capable Ports (ifIndex)

- Default CoS (caqIfCos)

- Trust State (caqIfTrustStateConfig)

- ACL Base (caqIfAclBase)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Cancel to close the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access the online help.

QoS Capable Ports (ifIndex)

A unique value, greater than zero, for each interface.

Default CoS (caqIfCos)

Indicates the default CoS value configured in this physical interface. This value will be assigned to a packet which does not have a CoS value in its Layer 2 header when it arrives at this interface.

Trust State (caqIfTrustStateConfig)

Used to set the trust state of packets arriving at an interface. One of four trust states can be applied: untrusted, trustCoS, trustIpPrec, or trustDscp.

ACL Base (caqIfAclBase)

For a given physical interface, this object indicates whether packets arriving at that interface are classified and policed based on a port's ACL or the ACL of the VLAN to which the port belongs. This object is instantiated only if the platform supports ACL configuration.