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Setting the timeout values to enable multipathing with iSCSI

If you use multipathing, you need to edit the timeout value in the iSCSI configuration file.

Step

  1. Edit the following file to provide the correct timeout value for your Host Utilities environment (DM-Multipath or Veritas Storage Foundation):
    If you are using... Enter the following values...
    Red Hat Enterprise Linux 7 series, 6 series, or 5 series, SUSE Linux Enterprise Server 10, 11, or 12 series, SUSE Linux Enterprise Server KVM and XEN, and Red Hat Enterprise Linux KVM. Edit /etc/iscsi/iscsid.conf to include the following value:
    • DM-Multipath environments: node.session.timeo.replacement_timeout = 5
    • Veritas Storage Foundation environments: node.session.timeo.replacement_timeout = 120
    Oracle VM 3 series Edit /etc/iscsi/iscsid.conf to include the following value: node.session.timeo.replacement_timeout = 5
    Red Hat Enterprise Linux 4 series Edit /etc/iscsi.conf to include the following DM-Multipath value:
    1. Remove the comment indicator from the ConnFailTimeout line in the Session Timeout Settings section.
    2. Set the value of ConnFailTimeout to 5
    Citrix XenServer 6 series For existing Storage Repositories:
    1. Edit /etc/iscsi/iscsid.conf to include the following value for DM-Multipath environments: node.session.timeo.replacement_timeout = 5
    2. Detach and then reattach SRs from XenCenter or by using the XenServer xe CLI.

    This will reflect the new iSCSI timeout settings for the existing SRs.

    For new Storage Repositories:
    1. Edit /etc/iscsi/iscsid.conf to include the following value for DM-Multipath environments: node.session.timeo.replacement_timeout = 5
    2. Create the new SR.

    New as well as existing SRs will be updated with the new iSCSI timeout settings.

    Red Hat Enterprise Virtualization Hypervisor 6.2 and later
    1. Edit /etc/iscsi/iscsid.conf to include the following value for DM-Multipath environments: node.session.timeo.replacement_timeout = 5
    2. Make sure that your iscsid.conf file is persistent across reboots: persist /etc/iscsi/iscsid.conf