D-Link DGS-1250 Series - Advanced Settings; DSCP Mutation Map

DGS-1250 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide
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Parameter Description
Rate Limit
Select and enter the queue rate limit settings here.
• When the Min Bandwidth option is selected, enter the minimum bandwidth
rate limit value in the space provided. This value must be between 64 and
10000000 kbps. Also, enter the maximum bandwidth (Max Bandwidth) rate
limit in the space provided. This value must be between 64 and 10000000
kbps.
When the minimal bandwidth is configured, the packet transmitted from the
queue can be guaranteed. When the maximum bandwidth is configured,
packets transmitted from the queue cannot exceed the maximum bandwidth
even if the bandwidth is available.
When configuring the minimal bandwidth, the aggregate of the configured
minimum bandwidth must be less than 75 percent of the interface bandwidth
to make sure the configured minimal bandwidth can be guaranteed. It is not
necessary to set the minimum guaranteed bandwidth for the highest strict
priority queue. This is because the traffic in this queue will be serviced first if
the minimal bandwidth of all queues is satisfied.
The configuration of this command can only be attached to a physical port
but not a port-channel. That is the minimum guaranteed bandwidth of one
CoS cannot be used across physical ports.
• When the Min Percent option is selected, enter the minimum bandwidth
percentage value in the space provided. This value must be between 1 and
100 percent (%). Also, enter the maximum percentage value (Max Percent)
in the space provided. This value must be between 1 and 100 percent (%).
• Select the None option to remove the rate limit on the specified port(s).
Click the Apply button to accept the changes made.
Advanced Settings
DSCP Mutation Map
This window is used to display and configure the Differentiated Services Code Point (DSCP) mutation map settings.
When a packet is received by an interface, based on a DSCP mutation map, the incoming DSCP can be mutated to
another DSCP immediately before any QoS operations. The DSCP mutation is helpful to integrate domains with
different DSCP assignments. The DSCP-CoS map will still be based on the original DSCP of the packet. All the
subsequent operations will base on the mutated DSCP.
To view the following window, click QoS > Advanced Settings > DSCP Mutation Map, as shown below:
Figure 7-7 DSCP Mutation Map Window