Tips and Pitfalls: iSCSI and iSLB

Common Commands

show iscsi initiator summary
show iscsi initiator detail
show iscsi session initiator initiator target target
iscsi save-initiator name name
show islb initiator
show islb session
show islb vrrp summary
show islb vrrp assignment

Key Points / Pitfalls

  • Incoming and outgoing CHAP passwords must be different
  • Iscsi import target fc does not apply to iSLB initiators
  • If IVR and iSLB features are enabled in the same fabric, you should have at least one switch in the
    fabric where both these features are enabled. Any zoning-related configuration and activation (for
    normal zones, IVR zones, or iSLB zones) must be performed on this switch. Otherwise, there may
    be traffic disruption in the fabric.
  • All iSCSI interfaces in a VRRP group that has load balancing enabled must have the same interface
    VSAN, authentication, proxy initiator mode, and forwarding mode.
  • If an Ethernet PortChannel is configured between the IPS module and an Ethernet switch, the load
    balancing policy on the Ethernet switch must be based on source/destination IP address only, not port
    numbers, for load balancing with VRRP to operate correctly.
  • A Gigabit Ethernet interface configured for iSLB can only be in one VRRP group because redirected
    sessions do not carry information about the VRRP IP address or group.
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