HP Cisco Nexus 5000 Cisco MDS 9000 Family CLI Configuration Guide - Release 4. - Page 1127

Chapter 43 Configuring iSCSI iSNS Send documentation comments to [email protected] iSNS profile ABC 5 minutes input rate 112 bits/sec, 14 bytes/sec, 0 frames/sec 5 minutes output rate 0 bits/sec, 0 bytes/sec, 0 frames/sec 1935 packets input, 132567 bytes 4 multicast frames, 0 compressed 0 input errors, 0 frame, 0 overrun 0 fifo 1 packets output, 42 bytes, 0 underruns 0 output errors, 0 collisions, 0 fifo 0 carrier errors About iSNS Server Functionality When enabled, the iSNS server on the Cisco 9000 Family MDS switch tracks all registered iSCSI devices. As a result, iSNS clients can locate other iSNS clients by querying the iSNS server. The iSNS server also provides the following functionalities: • Allows iSNS clients to register, deregister, and query other iSNS clients registered with the iSNS server. • Provides centralized management for enforcing access control to provide or deny access to targets from specific initiators. • Provides a notification mechanism for registered iSNS clients to receive change notifications on the status change of other iSNS clients. • Provides a single access control configuration for both Fibre Channel and iSCSI devices. • Discovers iSCSI targets that do not have direct IP connectivity to the iSCSI initiators. Example Scenario The iSNS server provides uniform access control across Fibre Channel and iSCSI devices by utilizing both Fibre Channel zoning information and iSCSI access control information and configuration. An iSCSI initiator acting as an iSNS client only discovers devices it is allowed to access based on both sets of access control information. Figure 43-23 provides an example of this scenario. OL-18084-01, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family CLI Configuration Guide 43-83