QoS Trust Settings Window
This window is only available for Catalyst 2950 and Catalyst 3550 switches.
It appears when you choose Device > QoS > Trust Settings on the menu
bar. You can also click here
to launch it. Use it to specify which marker
CoS,
DSCP, or IP precedence
you
will trust in the incoming packets on device interfaces.
Begin by selecting a device from the Host Name list. Then modify the
settings in the table as necessary. When you finish with the window, click OK.
To modify the trust settings for one interface, choose
one of these alternatives:
- Select the row for the interface, click Modify, and use the Modify
QoS Trust Settings window.
- Edit the cells in the row for the interface by following these steps:
- Click in Trust State cell and select Trust CoS, Trust DSCP,
Trust IP Precedence, or Not Trusted from a drop-down list.
Restriction: For Catalyst 2950 switches, Trust IP Precedence
is not available.
- Enter a default CoS value (0 to 7) in the CoS Default cell. This value
is used when an incoming packet has no CoS value.
- Check the CoS Override box if you want the default to replace all
CoS values in incoming packets.
- Click in the DSCP Mutation Table cell if you selected Trust DSCP.
Then select a DSCP mutation table from the drop-down list if you want incoming
DSCP values to be mapped to a different set of DSCP values. If you do not
want different values, select Default.
Restriction: DSCP mutation tables are offered only for Catalyst 3550
switches. You define them in the QoS Maps window.
Note: You can perform step 1 with a Catalyst 2950 switch only if it
runs the enhanced software image. You can perform
steps 2 and 3 with all Catalyst 2950 switches.
To modify the trust setting for more than one interface, select the rows for the
interfaces, click Modify, and use the Modify QoS Trust Settings window.
.