Cisco Nexus 5000 Series Nx-Os San Switching Configuration Guide - Cisco Nexus 5000 Series Configuration Manual

Overview
• Fx port zoning-Defines zone members based on the switch port.
• Domain ID and port number (for Brocade interoperability)
• iSCSI zoning-Defines zone members based on the host zone.
• LUN zoning-When combined with N port zoning, LUN zoning helps ensure that LUNs are accessible
only by specific hosts, providing a single point of control for managing heterogeneous storage-subsystem
access.
• Read-only zones-An attribute can be set to restrict I/O operations in any zone type to SCSI read-only
commands. This feature is especially useful for sharing volumes across servers for backup, data
warehousing, etc.
• Broadcast zones-An attribute can be set for any zone type to restrict broadcast frames to members of
the specific zone.
To provide strict network security, zoning is always enforced per frame using access control lists (ACLs) that
are applied at the ingress switch. All zoning polices are enforced in hardware, and none of them cause
performance degradation. Enhanced zoning session-management capabilities further enhance security by
allowing only one user at a time to modify zones.
Device Alias Services
All switches in the Cisco MDS 9000 Family support Device Alias Services (device alias) on a per-VSAN
basis and on a fabric-wide basis. Device alias distribution allows you to move host bus adapters (HBAs)
between VSANs without manually reentering alias names.
Fibre Channel Routing
Fabric Shortest Path First (FSPF) is the standard path selection protocol used by Fibre Channel fabrics. The
FSPF feature is enabled by default on all Fibre Channel switches. You do not need to configure any FSPF
services except in configurations that require special consideration. FSPF automatically calculates the best
path between any two switches in a fabric. Specifically, FSPF is used to perform these functions:
Dynamically compute routes throughout a fabric by establishing the shortest and quickest path between any
two switches.
Select an alternative path in the event of the failure of a given path. FSPF supports multiple paths and
automatically computes an alternative path around a failed link. FSPF provides a preferred route when two
equal paths are available.
SCSI Targets
Small Computer System Interface (SCSI) targets include disks, tapes, and other storage devices. These targets
do not register logical unit numbers (LUNs) with the name server. The SCSI LUN discovery feature is initiated
on demand, through CLI or SNMP. This information is also synchronized with neighboring switches, if those
switches belong to the Cisco Nexus 5000 Series.
OL-xxxxx-xx
◦ Fibre Channel identifier (FC-ID)
◦ WWN
◦ WWN plus interface index, or domain ID plus interface index
◦ iSCSI name
◦ IP address

Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide

SAN Switching Overview
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