Iscsi Ha With Host Not Having Any Multi-Path Software - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Cisco mds 9000 family cli configuration guide - release 4.x (ol-18084-01, february 2009)

Hide thumbs Also See for AP776A - Nexus Converged Network Switch 5020:

Command reference manual (1640 pages)

Configuration manual (1486 pages)

Reference (886 pages)

Table of Contents

iSCSI High Availability

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

Figure 43-15

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 four 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 four iSCSI sessions.

If the iSCSI host NIC-1 fails (see

still have sessions 3 and 4.

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

sessions 3 and 4 are still available.

If the storage port 1 fails, then the IPS ports will terminate sessions 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 offline state). But sessions 2 and 4 are

still available.

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

takes care of load-balancing or failover across the different paths to access the storage.