Setup Guide

Configuring Storage 57

•

Fully Redundant

— This configuration contains XenServer hosts, each

with two NICs (bonded to provide high availability) for iSCSI connectivity

and a PS Series enclosure with redundant RAID controllers. One of each

host's NICs is connected to Ethernet switch 0, while the second of each

host's NICs is connected to Ethernet switch 1. The two Ethernet switches

are connected by two Inter Switch Links (ISLs). Ethernet switch 0 has

connections to two ports on RAID controller 0 and one connection to

RAID controller 1. Ethernet switch 1 has connections to two ports on

RAID controller 1 and one connection to RAID controller 0. See

Figure 5-21 for an illustration of this configuration.

Storage repositories on a XenServer host or a XenServer pool can be

created on the iSCSI volumes on the EqualLogic array.

NIC0

and

NIC1

XenServer host are bonded to provide high availability for the iSCSI

storage traffic. This configuration provides redundancy against host NIC,

switch, or array controller failure.

Figure 5-21. PS Series – Fully Redundant

XenServer Host(s)

Redundant Ethernet

Switches

NIC 0

LAN

NIC 1

ISL

Dell EqualLogic

PS5000 Series Array