Enabling The Isns Server; Isns Configuration Distribution; Configuring The Esi Retry Count - Cisco MDS 9000 series Configuration Manual

Chapter 4 Configuring iSCSI
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
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Enabling the iSNS Server

Before the iSNS server feature can be enabled, iSCSI must be enabled (see the
on page
on a switch, every IPS port whose corresponding iSCSI interface is up is capable of servicing iSNS
registration and query requests from external iSNS clients.
To enable the iSNS server, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# isns-server enable
switch(config)# no isns-server enable
If you are using VRRP IPv4 addresses for discovering targets from iSNS clients, ensure that the IP
Note
address is created using the secondary option (see
page

iSNS Configuration Distribution

You can use the CFS infrastructure to distribute the iSCSI initiator configuration to iSNS servers across
the fabric. This allows the iSNS server running on any switch to provide a querying iSNS client a list of
iSCSI devices available anywhere on the fabric. For information on CFS, see the Cisco MDS 9000
Family NX-OS System Management Configuration Guide.
To enable iSNS configuration distribution using, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# isns distribute
switch(config)# no isns distribute

Configuring the ESI Retry Count

The iSNS client registers information with its configured iSNS server using an iSNS profile. At
registration, the client can indicate an entity status inquiry (ESI) interval of 60 seconds or more. If the
client registers with an ESI interval set to zero (0), then the server does not monitor the client using ESI.
In such cases, the client's registrations remain valid until explicitly deregistered or the iSNS server
feature is disabled.
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Configuring the Registration Period, page 4-86
iSNS Client Registration and Deregistration, page 4-86
Target Discovery, page 4-86
Verifying the iSNS Server Configuration, page 4-87
4-4). When you disable iSCSI, iSNS is automatically disabled. When the iSNS server is enabled
5-19).
Purpose
Enters configuration mode.
Enables the iSNS server.
Disables (default) the iSNS server.
"Adding Virtual Router IP Addresses" section on
Purpose
Enters configuration mode.
Uses the CFS infrastructure to distribute the iSCSI
virtual target configuration to all switches in the fabric.
Stops (default) the distribution of iSCSI virtual target
configuration to all switches in the fabric.
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
iSNS
"Enabling iSCSI" section
4-85