Cisco SN 5420 Storage Router Software Configuration Guide, Release�2.1
Chapter 7 - Configuring iSCSI SAN Interconnect
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Configuring iSCSI SAN Interconnect

Table Of Contents

Configuring iSCSI SAN Interconnect

Prerequisite Tasks

Summary of Configuration Process

Assigning Additional SCSI Routing Instances

Configuring User Name and Password

Verifying and Saving Configuration


Configuring iSCSI SAN Interconnect


This chapter explains how to configure your SN 5420 Storage Router for iSCSI SAN interconnect and contains the following sections:

Prerequisite Tasks

Summary of Configuration Process

Assigning Additional SCSI Routing Instances

Configuring User Name and Password

Verifying and Saving Configuration

iSCSI SAN interconnect is configured with the values entered with the initial system configuration script. To configure this deployment option further and to verify the configuration, use the CLI commands, as described in this chapter, or you can use the web-based GUI. To access the web-based GUI, point your browser to the storage router's management interface IP address. After logging on, click the Help link to access online help for the GUI.

Prerequisite Tasks

Before configuring iSCSI SAN interconnect, make sure you have configured all system parameters as described in "First-Time Configuration," or "Configuring System Parameters."

Summary of Configuration Process

The basic configuration parameters needed for an iSCSI SAN interconnect deployment of the SN 5420 Storage Router are entered with the initial system configuration script. Option number 3 (iSCSI SAN interconnect) must be chosen as the configuration deployment for the SN 5420 for the first question in the script.

Once all requested values have been entered and the script completes, a single FC server instance named, defaultFC, is automatically created, and a local name of remoteIscsi is given to the SCSI routing instance on a remote SN 5420 to which defaultFC will connect. In addition, the topology for the Fibre Channel interface is automatically set to loop. With the factory default of the autoconfig mode set to on, the SN 5420 automatically initiates the target discovery process and presents virtual storage devices with locally assigned WWPNs to the Fibre Channel hosts.

Only one FC server instance is allowed for an iSCSI SAN interconnect configuration. More than one SCSI routing instance on remote SN 5420 Storage Routers can be assigned to the FC server instance. The procedure to assign additional SCSI routing instances to the FC server instance are provided in this chapter.

A user name and password needs to be applied to the FC server instance if SCSI routing instances on remote SN 5420 Storage Routers require authentication in order to be accessed. The procedure to configure the user name and password for the FC server instance is provided in this chapter.

To configure the FC server instance more extensively use the fc-server commands as documented in "Command Line Interface Reference."

Figure 7-1 illustrates an example configuration of an iSCSI SAN interconnect deployment of the SN 5420, with two SCSI routing instances on remote SN 5420s assigned to the FC server instance.

Figure 7-1 iSCSI SAN Interconnect Example Configuration

Assigning Additional SCSI Routing Instances

If needed, more than one SCSI routing instance on remote SN 5420s can be assigned to the FC server instance, defaultFC.

Assigning a SCSI routing instance on a remote SN 5420 to the FC server instance consists of giving the SCSI routing instance a local name and specifying its IP address.

Use the following procedure if you need to assign additional SCSI routing instances to the FC server instance.

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

fc-server defaultFC server remoteIscsi2 10.20.9.25

Assign a SCSI routing instance on a remote SN 5420 to the FC server instance (defaultFC) by giving the SCSI routing instance a local name (remoteIscsi2) and specifying its IP address (10.20.9.25).

Only one SCSI routing instance can be assigned at a time; repeat this step to assign more SCSI routing instances.

Note Up to 31 targets can be presented to the Fibre Channel hosts.

Configuring User Name and Password

Configuring user name and password consists of setting a user name and password to be applied to the FC server instance for access to the SCSI routing instances that require authentication on remote SN 5420 Storage Routers.


Note Only one user name and password can be set for the FC server instance. To make the FC server instance's user name and password known to the SCSI routing instances that require authentication, see "Configuring Authentication."


Use the following procedure to configure the user name and password.

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

fc-server defaultFC username defaultFC

Set the user name (defaultFC) to be applied to the FC server instance (defaultFC) for access to the SCSI routing instances that require authentication.

Note In the example command, the name of the FC server instance is used for the user name as well, for easy identification.

Step 3 

fc-server defaultFC password febr%02

Set the password (febr%02) to be applied to the FC server instance (defaultFC) for access to the SCSI routing instances that require authentication.

Verifying and Saving Configuration

Verify the iSCSI SAN interconnect configuration using the procedures that follow. You can save the configuration at any time by using the save all bootconfig command. You must save the running configuration to the bootable configuration for it to be retained in the storage router when it is rebooted. Once you have saved the configuration, you can verify that the configuration to be used when the storage router is rebooted matches the currently running configuration.

Use the following procedure to verify the local name and IP address for SCSI routing instance(s) on remote SN 5420s assigned to the FC server instance.

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

show fc-server defaultFC servers

or

show fc-server all servers

Display local name and IP address of SCSI routing instances on remote SN 5420s (keyword is servers) assigned to the FC server instance (Example 7-1).

Note As shown in the second command, you can type the keyword, all, as a shortcut, instead of the FC server instance name, defaultFC.

Example 7-1, shows two SCSI routing instances on remote SN 5420(s) assigned to the FC server instance, defaultFC.

Example 7-1 Verifying Local Name and IP Address for SCSI Routing Instances on Remote SN 5420s

[SN5420]# show fc-server defaultFC servers
For fc-server defaultFC:
remoteIscsi - 10.20.9.40
remoteIscsi2 - 10.20.9.25


Use the following procedure to verify the storage devices discovered and presented to the Fibre Channel hosts.

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

show fc-server defaultFC targets

Display storage devices discovered and presented to the Fibre Channel hosts as provided by the FC server instance (Example 7-2).

Example 7-2 Verifying All Discovered Storage Devices Presented to Fibre Channel Hosts

[SN5420]# show fc-server defaultFC targets
For fc-server defaultFC:
No configured targets
iScsi discovered targets:
Server: remoteIscsi (id = 1, IP = 10.20.9.40)
   Name: iscsi
  State: Connected
   Name: iqn.1987-05.com.cisco.00.32343b44e0b52df7d10e57374fd5d9c7.target1
  State: Connected
   Name: iqn.1987-05.com.cisco.00.978a28ce546a505b4de8b6c31df8dfb3.target2
  State: Connected
   Name: iqn.1987-05.com.cisco.00.4e0feddaee58f584a629a772fa3680a9.target3
  State: Connected
   Name: iqn.1987-05.com.cisco.00.7b6330b813a6a121006dae2ff1b40f2f.target4
  State: Connected
   Name: iqn.1987-05.com.cisco.00.cda97184a33d58f21df4c75294583281.target5
  State: Connected
FC enabled targets:
  IPTAN: 10.20.9.40/iqn.1987-05.com.cisco.00.32343b44e0b52df7d10e57374fd5d9c7.target1
   WWPN: 0x3200002145a0a5b8
  IPTAN: 10.20.9.40/iqn.1987-05.com.cisco.00.978a28ce546a505b4de8b6c31df8dfb3.target2
   WWPN: 0x310000214520285c
  IPTAN: 10.20.9.40/iqn.1987-05.com.cisco.00.4e0feddaee58f584a629a772fa3680a9.target3
   WWPN: 0x310000214520375d
  IPTAN: 10.20.9.40/iqn.1987-05.com.cisco.00.7b6330b813a6a121006dae2ff1b40f2f.target4
   WWPN: 0x310000214520298e
  IPTAN: 10.20.9.40/iqn.1987-05.com.cisco.00.cda97184a33d58f21df4c75294583281.target5
   WWPN: 0x31000021452081c4


Use the following procedure to verify iSCSI SAN interconnect configuration information.

 
Command
Description

Step 1 

enable

Enter Administrator mode.

Step 2 

show fc-server defaultFC

Display FC server instance configuration information, such as the state of the autoconfig mode, user name and password set for the SCSI routing instances on remote SN 5420s requiring authentication, and the local name and IP address of SCSI routing instance(s) assigned to the FC server instance (Example 7-3).

Note If a password was set, an encryption displays with the show fc-server command. If a password was not set, "none" displays for the password.

Example 7-3 Verifying FC Server Instance Information

[SN5420]# show fc-server defaultfc
defaultFC description "(not set)"
defaultFC target naming authority "none"
defaultFC target log level is "notification"
defaultFC serverif ge2 10.1.0.33/24
defaultFC deviceif fc1 
defaultFC autoconfig "on"
defaultFC username "defaultFC"
defaultFC password "9 151cccd1106601383ef8fbe1bf6c5a8f1c"
defaultFC server remoteIscsi 10.20.9.40