Advanced Traffic Management Guide K/KA/KB.15.15

Using QoS to classify and prioritize network traffic...............................................................188
Applying QoS to inbound traffic at the network edge...........................................................189
Preserving QoS in outbound traffic in a VLAN.....................................................................189
Using QoS to optimize existing network resources................................................................189
Using classifier-based QoS to provide additional policy actions and aid migration in networks
with legacy and OEM devices...........................................................................................189
Configuring QoS globally......................................................................................................190
Viewing a global QoS configuration.......................................................................................191
Assigning an 802.1p priority for a global TCP/UDP classifier.....................................................191
Viewing a list of all TCP and UDP QoS classifiers......................................................................192
Assigning a DSCP policy for a global TCP/UDP classifier..........................................................192
Creating a DSCP policy based on TCP/UDP port number classifiers.......................................192
Assigning DSCP policies to packets matching specified TCP and UDP port applications (Example)....195
Viewing resource usage for QoS policies.................................................................................196
Assigning a priority for a global IP-device classifier...................................................................197
Assigning a DSCP policy for a global IP-device classifier............................................................199
Creating a policy based on IP address....................................................................................199
Assigning DSCP policies to packets matching specified global classifiers......................................202
Assigning an 802.1p priority for a global IP-precedence classifier...............................................203
Using a global IP-Diffserv classifier to mark matching packets with an 802.1p priority....................204
Assigning a DSCP policy for a global IP-Diffserv classifier..........................................................205
Assigning a priority for a global layer 3 protocol classifier.........................................................208
Assigning a priority for a global VLAN-ID classifier...................................................................209
Assigning a DSCP policy for a global VLAN-ID classifier............................................................210
Creating a policy based on the VLAN-ID classifier....................................................................211
Assigning a priority for a global source-port classifier................................................................213
Assigning a DSCP policy for a global source-port classifier........................................................214
Creating a policy based on source-port classifiers.....................................................................214
Configuring classifier-based QoS............................................................................................218
Configuring QoS actions in a policy.......................................................................................221
Reconfiguring the 802.1p priority value currently assigned to a DSCP codepoint...........................229
Viewing a classifier-based QoSconfiguration............................................................................229
Configuring a QoS policy for Voice over IP and Data traffic (Example)........................................232
Configuring a QoS policy for layer 4 TCP/UDP traffic (Example)................................................233
Configuring a QoS policy for subnet traffic (Example)................................................................233
Using Differentiated Services Codepoint (DSCP) mapping..........................................................233
Viewing non-default codepoint settings (Example).....................................................................235
Default priority settings for selected codepoints....................................................................235
Changing the priority setting on a policy when classifiers are currently using the policy (Example)....235
Configuring QoS queues.......................................................................................................236
Changing the number of priority queues (Example)...................................................................237
Viewing the QoS queue configuration.....................................................................................237
Using the outbound queue monitor.........................................................................................238
Viewing per-queue counts.................................................................................................238
About QoS..........................................................................................................................239
QoS operation................................................................................................................239
Globally-configured QoS.............................................................................................239
Classifier-based QoS...................................................................................................240
QoS packet classification..................................................................................................240
Using multiple global criteria........................................................................................240
Classifier-based match criteria.......................................................................................241
QoS traffic marking..........................................................................................................241
Globally-configured traffic marking................................................................................241
Layer 2802.1p prioritization.....................................................................................242
Layer 3 DSCP marking.................................................................................................243
8 Contents