412 Configuring iSCSI Optimization
console(config)#interface range te1/0/1-4,te1/0/16-17
6
Enable VLAN tagging to allow the CNA connected ports to carry 802.1p
priority values through the network.
console(config-if)#switchport mode trunk
7
Enter datacenter bridging mode to enable PFC on the ports.
console(config-if)#datacenter-bridging
8
Enable PFC and configure traffic marked with 802.1p priority 4 to be
paused rather than dropped when congestion occurs.
console(config-if-dcb)#priority-flow-control mode on
console(config-if-dcb)#priority-flow-control priority 4
no-drop
console(config-if-dcb)#exit
9
Configure ETS by mapping the lossless traffic onto TC 1 and sharing
bandwidth equally between the lossless and lossy traffic classes.
console(config-if)#classofservice traffic-class-group 0 0
console(config-if)#classofservice traffic-class-group 1 0
console(config-if)#classofservice traffic-class-group 2 0
console(config-if)#classofservice traffic-class-group 3 0
console(config-if)#classofservice traffic-class-group 4 1
console(config-if)#classofservice weight 50 50 0
10
Exit interface configuration mode for the range of interfaces.
console(config-if)#exit
To configure a PC80xx switch for iSCSI when EQL arrays are present or for
highest performance in topologies where packet loss is not an issue, perform
the following steps starting from a default configuration:
1
Enter global configuration mode and configure the MTU on the switch.
console#configure
console(config)#ip mtu 9216
2
Disable sending of DCBX information
console(config)#no dcb enable
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