Dell PowerConnect 8024 User Configuration Manual page 411

4 Configure the DCBx port role as auto-downstream. This step
automatically enables PFC and ETS (PC81xx only) on the ports using the
configuration received from the other switch.
console(config-if)#lldp dcbx port-role auto-down
console(config-if)#exit
5 Enter interface configuration mode for the switch-facing ports and
configure the DCBx port role as auto-up. This step automatically enables
PFC and ETS (PC81xx only) on the ports using the configuration received
from the other switch.
console(config)#interface range te1/0/16-17
console(config-if)#lldp dcbx port-role auto-up
6 Add the ports to port channel 1
console(config-if)#channel-group 1 mode active
console(config-if)#exit
7 Configure the port channel to be in trunk mode
console(config)#interface po1
console(config-if)#switchport mode trunk
console(config-if)#exit
To configure a PC81xx switch in a lossless DCBX environment where the
switch is directly connected to storage arrays and the CNAs (no other switch
is present), 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 Create VLAN 100. This command also enters the VLAN configuration
mode for VLAN 100.
console(config)#vlan 100
console(config-vlan100)#exit
3 Enable iSCSI CoS. This enables generation of the iSCSI Application
Priority TLV required by the CNAs.
console(config)#iscsi cos enable
4 Map VLAN priority 4 onto traffic class 4.
(config)#classofservice dot1p-mapping 4 4
5 Enter Interface Configuration mode for CNA connected ports 1-4 and
array connected ports 16-17.
Configuring iSCSI Optimization
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