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Default iSCSI Optimization Values
The following table lists the default values for the iSCSI optimization feature.
Table 40. iSCSI Optimization Defaults
Parameter Default Value
iSCSI Optimization global setting Disabled
iSCSI CoS mode (802.1p priority queue mapping) Enabled: dot1p priority 4 without the remark setting
iSCSI CoS Packet classification VLAN classifies the iSCSI packets instead of by DSCP values.
VLAN priority tag iSCSI flows are assigned by default to dot1p priority 4 without
the remark setting.
DSCP None: user-configurable.
Remark Not configured.
iSCSI session aging time 10 minutes
iSCSI optimization target ports iSCSI well-known ports 3260 and 860 are configured as
default (with no IP address or name) but can be removed as
any other configured target.
iSCSI Optimization Prerequisites
The following are iSCSI optimization prerequisites.
iSCSI optimization requires LLDP on the switch. LLDP is enabled by default (refer to Link Aggregation Control Protocol
(LACP)).
iSCSI optimization requires you allocate two ingress ACL groups in CAM, refer to CAM Allocation
NOTE:
Before you configure iSCSI optimization, you can ensure that these prerequisites are met by copying the iSCSI
configuration file to the running configuration. The iSCSI configuration file is stored at: flash:/CONFIG_TEMPLATE/
ISCSI_DCB_CONFIG.
Configuring iSCSI Optimization
To configure iSCSI optimization, use the following commands.
1. Globally enable iSCSI optimization on the switch.
CONFIGURATION mode
[no] iscsi enable
NOTE:
You cannot enable iSCSI optimization when the VLT domain is active. To deactivate the VLT domain, use the no
vlt domain command.
The default is disabled.
2. Configure the iSCSI target ports and optionally the IP addresses on which iSCSI communication is monitored.
CONFIGURATION mode
[no] iscsi target port tcp-port-1 [tcp-port-2...tcp-port-16] [address ip-address]
tcp-port-n is the TCP port number or a list of TCP port numbers on which the iSCSI target listens to requests. You
can configure up to 16 target TCP ports on the switch in one command or multiple commands. The default is 860, 3260.
Separate port numbers with a comma.
ip-address specifies the IP address of the iSCSI target. When you enter the no form of the command, and the TCP
port to be deleted is one bound to a specific IP address, the IP address value must be included in the command.
3. Set the QoS policy that is applied to the iSCSI flows.
CONFIGURATION mode
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iSCSI Optimization