Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual page 809

Mds 9000 family

Table of Contents

Configuring iSCSI

S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .

iSCSI High Availability with Host Running Multi-Path Software

Figure 35-14

multi-path software. In this scenario, the host will have 4 iSCSI sessions. Two iSCSI sessions from each

host NIC to the two IPS port.

Figure 35-14 Host Running Multi-Path Software

Each IPS ports is exporting the same two Fibre Channel target ports of the storage but as different iSCSI

target names (if you use dynamic iSCSI targets). So the two IPS ports are exporting a total of 4 iSCSI

target devices. These four iSCSI targets map the same two ports of the Fibre Channel target.

The iSCSI host uses NIC-1 to connect to IPS port 1 and NIC-2 to connect to IPS port 2. Each IPS port

exports two iSCSI targets, so the iSCSI host creates 4 iSCSI sessions.

If the iSCSI host NIC-1 fails (see

still have session 3 and 4.

If the IPS port -1 fails, iSCSI host cannot connect to the IPS port, then session 1 and 2 fail. But sessions

3/4 are still available.

If the Storage port P-1 fails, then the IPS ports will terminate session 1 and 3 (put iSCSI virtual target

iqn.com.cisco.mds-5.1-2.p1 and iqn-com.cisco.mds-5.1-1.p1 in off-line state). But session 2/4 are still

In this topology, you have recovery from failure of any of the components. The host multi-path software

takes care of load-balancing/fail-over across the different paths to access the storage.

OL-6973-03, Cisco MDS SAN-OS Release 2.x

shows the physical and logical topology for iSCSI HA solution for hosts running

IP 10.1.1.1/24

IP 20.1.1.1/24

Logical View

iqn.com.cisco.mds-1.1-1.P1

iqn.com.cisco.mds-

iqn.com.cisco.mds-

Figure 35-14

for the physical view), then session 1 and 2 fail but we

Cisco MDS 9000 Family Configuration Guide

iSCSI High Availability