Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 499
Default iSCSI Optimization Values, Disabled on the S4820T.
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iSCSI optimization, which can turn on flow control again on reboot, use the no iscsi enable command and save the configuration. When you enable iSCSI on the switch, the following actions occur: • Link-level flow control is globally enabled, if it is not already enabled, and PFC is disabled. • iSCSI session snooping is enabled. • iSCSI LLDP monitoring starts to automatically detect EqualLogic arrays. The following message displays when you enable iSCSI on a switch and describes the configuration changes that are automatically performed: %STKUNIT0-M:CP %IFMGR-5-IFM_ISCSI_ENABLE: iSCSI has been enabled causing flow control to be enabled on all interfaces. EQL detection and enabling iscsi profile-compellent on an interface may cause some automatic configurations to occur like jumbo frames on all ports and no storm control and spanning tree port-fast on the port of detection. You can reconfigure any of the auto-provisioned configuration settings that result when you enable iSCSI on a switch. When you disable the iSCSI feature, iSCSI resources are released and the detection of EqualLogic arrays using LLDP is disabled. Disabling iSCSI does not remove the MTU, flow control, portfast, or storm control configuration applied as a result of enabling iSCSI. NOTE: By default, CAM allocation for iSCSI is set to 0. This disables session monitoring. Default iSCSI Optimization Values The following table lists the default values for the iSCSI optimization feature. Table 32. iSCSI Optimization Defaults Parameter Default Value iSCSI Optimization global setting Disabled on the S4820T. iSCSI CoS mode (802.1p priority queue mapping) iSCSI CoS Packet classification When you enable iSCSI, iSCSI packets are queued based on dot1p, instead of 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 499
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