Quality of Service (QoS): Managing Bandwidth More Effectively Using QoS Classifiers to Configure Quality of Service for Outbound Traffic
QoS IP
This feature applies only to IPv4 traffic and performs either of the following:
■ToS
■ToS Differentiated Services (Diffserv) Mode: This mode requires knowledge of the codepoints set in IP packets by the upstream devices and applications. It uses the ToS codepoint in IP packets coming from upstream devices and applications to assign 802.1p priorities to the pack- ets. You can use this option to do both of the following:
•Assign a New Prioritization Policy: A “policy” includes both a codepoint and a corresponding 802.1p priority. This option selects an incoming IPv4 packet on the basis of its codepoint and assigns a new codepoint and corresponding 802.1p priority. (Use the qos
•Assign an 802.1p Priority: This option reads the DSCP of an incoming IPv4 packet and, without changing this codepoint, assigns the 802.1p priority to the packet, as configured in the DSCP Policy Table (page
Before configuring the ToS Diffserv mode, you must use the
Unless