HP Cisco MDS 9124 Cisco MDS 9000 Family Fabric Manager Configuration Guide, Re - Page 1238

Chapter 66 Configuring Fabric Congestion Control and QoS QoS Send documentation comments to [email protected] Table 66-1 QoS Configuration Differences VSAN-Based QoS Zone-Based QoS If you configure the active zone set on a given VSAN and also configure QoS parameters in any of the member zones, you cannot associate the policy map with the VSAN. You cannot activate a zone set on a VSAN that already has a policy map associated. If the same flow is present in two class maps associated to a policy map, the QoS value of the class map attached first takes effect. If the same flow is present in two zones in a given zone set with different QoS values, the higher QoS value is considered. - During a zone merge, if the Cisco SAN-OS software detects a mismatch for the QoS parameter, the link is isolated. Takes effect only when QoS is enabled. Takes effect only when QoS is enabled. See the "About Zone-Based Traffic Priority" section on page 30-33 for details on configuring a zone-based QoS policy. Configuring Data Traffic To configure QoS using Fabric Manager, follow these steps:. Step 1 Step 2 Step 3 Step 4 Enable the QoS feature. Create and define class maps. Define service policies. Apply the configuration. About Class Map Creation Use the class map feature to create and define a traffic class with match criteria to identify traffic belonging to that class. The class map name is restricted to 63 alphanumeric characters and defaults to the match-all option. Flow-based traffic uses one of the following values: • WWN-The source WWN or the destination WWN. • Fibre Channel ID (FC ID) -The source ID (SID) or the destination ID (DID). The possible values for mask are FFFFFF (the entire FC ID is used-this is the default), FFFF00 (only domain and area FC ID is used), or FF0000 (only domain FC ID is used). Note An SID or DID of 0x000000 is not allowed. • Source interface-The ingress interface. 66-6 Cisco MDS 9000 Family CLI Configuration Guide OL-16184-01, Cisco MDS SAN-OS Release 3.x