Dell VNXe3300 VNXe Series Using a VNXe System with Generic iSCSI Storage - Page 60

For Red Hat 5 or later, For SuSE 10 or later, incoming

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Setting Up a Unix Host to Use VNXe Generic iSCSI Storage Table 3 Open-iscsi driver recommended settings Variable name Default setting Recommended setting node.startup manual auto node.session.iscsi.InitialR2T No Yes node.session.iscsi.ImmediateData Yes node.session.timeo.replacment_timeout 120 No 1201 node.conn[0].timeo.timeo.noop_out_interval 10 later in congested networks2 node.conn[0].timeo.timeo.noop_out_timeout 15 later in congested networks2 1. In congested networks you may increase this value to 600. However, this time must be greater than the combined node.conn[0].timeo.timeo.noop_out_interval and node.conn[0].timeo.timeo.noop_out_time times. 2. This value should not exceed the values in node.session.timeeo.replacement_timeout. 5. To start the iSCSI service automatically on reboot and powerup, set the run level to 345 for the iSCSI service. 6. Discover and log in to the host to which you want to connect with the iscsiadm command for Red Hat 5 or later or YaST for SuSE 10 or later. You need to perform a discovery on only a single IP address because the VNXe system also returns its other iSCSI target, if it is configured for a second iSCSI Server. 7. Configure optional CHAP authentication on the open-iscsi driver initiator: For Red Hat 5 or later Use the iscsiadm command to do the following: For optional initiator CHAP: a. Enable CHAP as the authentication method. b. Set the username for the initiator to the initiator's IQN, which you can find with the iscsiadm -m node command. c. Set the secret (password) for the initiator to the same secret that you entered for the host initiator on the VNXe system. For optional mutual CHAP a. Set the username (username_in) to the initiator's IQN, which you can find with the iscsiadm -m node command. b. Set the secret (password_in) for the target to the same secret that you entered for the VNXe iSCSI Server. For SuSE 10 or later Use the YaST to do the following for the open-iscsi driver initiator: For optional initiator CHAP: a. Enable incoming authentication. b. Set the initiator CHAP username to the initiator's IQN, which you can find with the iscsiadm -m node command. 60 Using a VNXe System with Generic iSCSI Storage

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Table 3
Open-iscsi driver recommended settings
Variable name
Default setting
Recommended setting
node.startup
manual
auto
node.session.iscsi.InitialR2T
No
Yes
node.session.iscsi.ImmediateData
Yes
No
node.session.timeo.replacment_timeout
120
120
1
1.
In congested networks you may increase this value to 600. However, this time must be greater than the combined
node.conn[0].timeo.timeo.noop_out_interval and node.conn[0].timeo.timeo.noop_out_time times.
node.conn[0].timeo.timeo.noop_out_interval
10
later in congested networks
2
2.
This value should
not
exceed the values in node.session.timeeo.replacement_timeout.
node.conn[0].timeo.timeo.noop_out_timeout
15
later in congested networks
2
60
Using a VNXe System with Generic iSCSI Storage
Setting Up a Unix Host to Use VNXe Generic iSCSI Storage
5.
To start the iSCSI service automatically on reboot and powerup, set the run level to
345 for the iSCSI service.
6.
Discover and log in to the host to which you want to connect with the
iscsiadm
command for Red Hat 5 or later or YaST for SuSE 10 or later.
You need to perform a discovery on only a single IP address because the VNXe system
also returns its other iSCSI target, if it is configured for a second iSCSI Server.
7.
Configure optional CHAP authentication on the open-iscsi driver initiator:
For Red Hat 5 or later
Use the
iscsiadm
command to do the following:
For optional initiator CHAP:
a.
Enable CHAP as the authentication method.
b.
Set the username for the initiator to the initiator’s IQN, which you can find with the
iscsiadm -m node
command.
c.
Set the secret (password) for the initiator to the
same
secret that you entered for
the host initiator on the VNXe system.
For optional mutual CHAP
a.
Set the username (username_in) to the initiator’s IQN, which you can find with the
iscsiadm -m node
command.
b.
Set the secret (password_in) for the target to the
same
secret that you entered for
the VNXe iSCSI Server.
For SuSE 10 or later
Use the YaST to do the following for the open-iscsi driver initiator:
For optional initiator CHAP:
a.
Enable
incoming
authentication.
b.
Set the initiator CHAP username to the initiator’s IQN, which you can find with the
iscsiadm -m node
command.