Dell PowerEdge XL 5133-4 MXL 10/40GbE Switch IO Module FTOS Command Reference - Page 166
iSCSI Optimization: Operation, Default iSCSI Optimization Values
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www.dell.com | support.dell.com The Aggregator auto-configures as follows: • Jumbo frame size is set to 12000 for all interfaces on all ports and port-channels, if it is not already enabled. • Unicast storm control is disabled on the interface identified by LLDP. iSCSI Optimization: Operation When the Aggregator auto-configures with iSCSI enabled, the following actions occur: • Link-level flow control is globally enabled and PFC is disabled. • iSCSI session snooping is enabled. • iSCSI LLDP monitoring starts to automatically detect EqualLogic arrays. iSCSI optimization requires LLDP to be enabled. LLDP is enabled by default when an Aggregator auto-configures. The following message is displayed 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. Default iSCSI Optimization Values Table 11-1 shows the default values for the iSCSI optimization feature. Table 11-1. iSCSI Optimization: Default Parameters Parameter iSCSI Optimization global setting iSCSI CoS mode (802.1p priority queue mapping) iSCSI CoS Packet classification VLAN priority tag DSCP Remark iSCSI session aging time iSCSI optimization target ports Default Value Enabled Enabled: dot1p priority 4 without remark setting iSCSI packets are classified by VLAN instead of by DSCP values. iSCSI flows are assigned by default to dot1p priority 4 without remark setting. None: user-configurable. Not configured. 10 minutes 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. 152 | iSCSI Optimization