HP 3500 Series Advanced Traffic Management Manual page 277

Syntax: vlan < vid > qos dscp < codepoint >
Assigns a DSCP policy to IP packets carrying the specified
VLAN ID, and overwrites the DSCP in these packets with the
assigned < codepoint > value.
Valid values for a DSCP codepoint are as follows:
- A binary value for the six-bit codepoint from 000000 to
111111.
- A decimal value from 0 (low priority) to 63 (high priority)
that corresponds to a binary DSCP bit set
-An ASCII standard name for a binary DSCP bit set
Type ? to display the list of valid codepoint entries.
The DSCP policy includes an 802.1p priority and determines
the packet's queue in the outbound port to which it is sent. If
the packet leaves the switch on a tagged port, it carries the
802.1p priority with it to the next downstream device.
(Default: No-override)
Syntax: no vlan < vid > qos
Removes a global QoS classifier for the specified VLAN.
Syntax: show qos device-priority
Displays a listing of all QoS VLAN-ID classifiers currently
in the running-config file.
Example. This example, assigns the following DSCP policies (codepoint and
associated 802.1p priority) to packets with the specified VLAN IDs:
VLAN-ID DSCP
40 000111
30 000101
20 000010
1 000010
1. Determine if the DSCP codepoints that you want to use to mark matching
packets already have an 802.1p priority assigned, which could indicate
use by existing applications (show qos dscp-map command). This is not a
problem as long as the configured priorities are acceptable for all appli-
cations using the same DSCP (see "Notes on Changing a Priority Setting"
on page 5-93.
Note that a DSCP codepoint must also have a priority configured before
you can use it to mark matching packets.
Quality of Service: Managing Bandwidth More Effectively
Priority
7
5
1
1
Globally-Configured QoS
5-59