Dell PowerConnect 8100 User's Configuration Guide - Page 837

ETS Configuration Example This example configures four classes of traffic: Best effort traffic Lossless FCoE/iSCSI traffic Expedited traffic CoS Queue 0 for untagged and VLAN-tagged frames with VPTs 0, 1, and 2 CoS Queues 1 & 2 for VLAN tagged frames with VPTs 3 & 4 respectively CoS Queue 3 on VLAN tagged frames with VPTs 5, 6, and 7 1. Enable Trust Mode on an Interface The following command enables the use of the dot1p priority of the incoming packet. It may be configured on a single interface, a range of interfaces or all interfaces. By default, ports are configured to trust the incoming user priority. console(config-if-Te1/0/1)#classofservice trust dot1p To show the configured trust mode on an interface, use the following command: console#show classofservice trust tengigabitethernet 1/0/1 Class of Service Trust Mode: Dot1P 2. Map Dot1p Priority to CoS Queues This step maps dot1p priorities to the CoS queues. This mapping places the incoming packet in the selected CoS queue based on the dot1p priority. It may be configured on a single interface, a range of interfaces, or all interfaces. To ensure lossless behavior, the dot1p priority must be mapped one to one to a CoS queue for the lossless priorities. Up to two lossless priorities may be configured on PC81xx switches. CoS queue 7 is reserved by the system and is not assignable. It is generally recommended that the administrator utilize CoS queues 0-3 as CoS queues 4-6 may be utilized by the system for other types of system traffic, e.g. routing protocol PDU handling. Frames with different user priorities assigned to a single CoS queue receive equal treatment. This example maps user priorities 0, 1, and 2 to CoS queue 0 (background or best effort traffic), user priorities 3 and 4 to CoS queues 1 and 2 (FCoE and iSCSI traffic), and all other priorities to CoS queue 2 (low latency and network control traffic). Configuring Data Center Bridging Features 837