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Configuring iSNS Servers
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 .
Enabling the iSNS Server
Before iSNS server feature can be enabled, iSCSI must be enabled (see the
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 IP addresses for discovering targets from iSNS clients, ensure that the IP address
Note
is created using the secondary option (see the
page
iSCSI Configuration Distribution
You can use the CFS infrastructure to distribute the iSCSI initiator configuration to iSNS servers across
fabric. This allows iSNS server running on any switch to provide to a querying iSNS client a list of iSCSI
devices available anywhere on the fabric. For information on CFS, see the
Infrastructure."
To enable configuration distribution, 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.
The ESI retry count is the number of times the iSNS server queries iSNS clients for their entity status.
The default ESI retry count is 3. The client sends the server a response to indicate that it is still alive. If
the client fails to respond after the configured number of retries, the client is deregistered from the server.
Cisco MDS 9000 Family Configuration Guide
35-64
35-4). When you disable iSCSI, iSNS is automatically disabled. When the iSNS server is enabled
36-18).
Purpose
Enters configuration mode.
Enables the iSNS server.
Disables (default) the iSNS server.
"Virtual Router IP Address Addition" 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.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Chapter 35
Configuring iSCSI
"Enabling iSCSI" section on
Chapter 5, "Using the CFS
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