Install Guide

24 Citrix XenServer with Dell SC Series Storage Configuration and Deployment | 3132-CD-V
After creating the server and server cluster objects, volumes can be created and mapped to the servers. For
XenServers in a pool, map LUNs to the server cluster object to ensure all servers use the same LUN number.
Continue to section 7 to create Storage Resources from these volumes on the XenServer or XenServer pool.
Note: See the Create a Cluster Object in Enterprise Manager and Creating and mapping a volume in
Enterprise Manager videos for additional information.
4.3 Multipath with a single subnet
Assigning a network to storage will prevent the use of the network for other functions such as host
management, but requires that the appropriate configuration be in place in order to ensure the network is
used for the desired traffic. For example, to dedicate a network to storage traffic, the NIC, storage target,
switch, and VLAN (if a VLAN is used) must be configured such that the target is only accessible over the
assigned NIC. This allows use of standard IP routing to control how traffic is routed between multiple NICs
within a XenServer.
Before dedicating a network interface as a storage interface for use with iSCSI SRs, ensure that the
dedicated interface uses a separate IP subnet which is not routable from the main management interface. If
this is not enforced, then storage traffic may be directed over the main management interface after a host
reboot, due to the order in which network interfaces are initialized.
The process for configuring multipathing in a single subnet environment is similar to that of a dual subnet
environment. The key difference is that redundancy is handled by the bonded network adapters. The
requirements for Open-iSCSI multipathing with SC Series storage in a single subnet are as follows:
 XenServer 6.5 or later
 iSCSI using two unique, dedicated storage NICs bonded together to act as a single interface
 One network storage interface using the bonded interface on a dedicated subnet that is different from
the XenServer management network to comply with Citrix best practices
 Multipathing enabled on all XenServer hosts in the pool
 iSCSI target IP addresses for the SC Series storage Front End control ports (in this example, the IP
addresses for the control port are 10.10.10.100 and 10.10.10.110)