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35.4. Binding/Unbinding an iface to a Portal
Whenever
iscsiadm is used to scan for interconnects, it will first check the iface.transport settings of each iface configuration in /var/lib/iscsi/ifaces. The iscsiadm utility will then bind discovered portals to any iface whose iface.transport is tcp.
This behavior was implemented for compatibility reasons. To override this, use the
-I iface_name to specify which portal to bind to an iface, as in:
# iscsiadm -m discovery -t st -p target_IP:port -I iface_name -P 1
By default, the
iscsiadm utility will not automatically bind any portals to iface configurations that use offloading. This is because such iface configurations will not have iface.transport set to tcp. As such, the iface configurations of Chelsio, Broadcom, and ServerEngines ports need to be manually bound to discovered portals.
It is also possible to prevent a portal from binding to any existing
iface. To do so, use default as the iface_name, as in:
# iscsiadm -m discovery -t st -p IP:port -I default -P 1
To remove the binding between a target and
iface, use:
# iscsiadm -m node -targetname proper_target_name -I iface0 --op=delete[7]
To delete all bindings for a specific
iface, use:
# iscsiadm -m node -I iface_name --op=delete
To delete bindings for a specific portal (e.g. for Equalogic targets), use:
# iscsiadm -m node -p IP:port -I iface_name --op=delete
Note
If there are no
iface configurations defined in /var/lib/iscsi/iface and the -I option is not used, iscsiadm will allow the network subsystem to decide which device a specific portal should use.
[7]
Refer to Chapter 36, Scanning iSCSI Targets with Multiple LUNs or Portals for information on
proper_target_name.
