Service Manual

dot1p Value in
the Incoming
Frame
Priority Group Assignment
5 LAN
6 LAN
7 LAN
The following describes the priority group-bandwidth assignment.
Priority Group Bandwidth Assignment
IPC 5%
SAN 50%
LAN 45%
PFC and ETS Conguration Command Examples
The following examples show PFC and ETS conguration commands to manage your data center trac.
Example of Conguring QoS Priority-Queue Assignment to Honor Dot1p Priorities
Dell(conf)# service-class dynamic dot1p
Or
Dell(conf)# interface tengigabitethernet 1/1/1
Dell(conf-if-te-1/1/1)# service-class dynamic dot1p
Example of conguring a DCB Map
dcb-map test
priority-group 1 bandwidth 50 pfc on
priority-group 2 bandwidth 45 pfc off
priority group 3 bandwidth 5 pfc off
priority-pgid 2 2 2 1 3 2 2 2
Example of Applying DCB Map to an Interface
Dell(conf)# int tengigabitethernet 1/1/1
Dell(conf-if-te-1/1/1)# dcb-map test
Using PFC and ETS to Manage Converged Ethernet Trac
Using PFC and ETS to manage converged ethernet trac:
dcb-map stack-unit all dcb-map-name
Hierarchical Scheduling in ETS Output Policies
ETS supports up to three levels of hierarchical scheduling.
For example, you can apply ETS output policies with the following congurations:
Priority group 1
Assigns trac to one priority queue with 20% of the link bandwidth and strict-priority scheduling.
Priority group 2 Assigns trac to one priority queue with 30% of the link bandwidth.
Priority group 3 Assigns trac to two priority queues with 50% of the link bandwidth and strict-priority scheduling.
In this example, the congured ETS bandwidth allocation and scheduler behavior is as follows:
244
Data Center Bridging (DCB)