HP Cisco MDS 9134 Cisco MDS 9000 Family Fabric Manager Configuration Guide, Re - Page 1235

Chapter 66 Configuring Fabric Congestion Control and QoS QoS Send documentation comments to [email protected] Step 2 Step 3 Step 4 The FCC information is displayed in the Information pane. The General tab is the default. Select the switch on which you want to enable FCC. Check the Enable check box. Click Apply Changes to save your changes. Assigning FCC Priority To assign FCC priority using Fabric Manager, follow these steps: Step 1 Step 2 Step 3 Step 4 Expand Switches, expand FC Services and then select FCC in the Physical Attributes pane. The FCC information is displayed in the Information pane. The General tab is the default. Select the switch for which you want to assign the FCC priority. Enter the priority in the Priority column. Click Apply Changes to save your changes. QoS QoS implementation in the Cisco MDS 9000 Family follows the differentiated services (DiffServ) model. The DiffServ standard is defined in RFCs 2474 and 2475. All switches support the following types of traffic: • About Control Traffic, page 66-3 • Enabling or Disabling Control Traffic, page 66-4 • About Data Traffic, page 66-4 • VSAN Versus Zone-Based QoS, page 66-5 • Configuring Data Traffic, page 66-6 • About Class Map Creation, page 66-6 • Creating a Class Map, page 66-7 • About Service Policy Definition, page 66-8 • About Service Policy Enforcement, page 66-8 • About the DWRR Traffic Scheduler Queue, page 66-8 • Changing the Weight in a DWRR Queue, page 66-9 About Control Traffic The Cisco MDS 9000 Family supports QoS for internally and externally generated control traffic. Within a switch, control traffic is sourced to the supervisor module and is treated as a high priority frame. A high priority status provides absolute priority over all other traffic and is assigned in the following cases: OL-16184-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family CLI Configuration Guide 66-3