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20-24
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-6965-03, Cisco MDS SAN-OS Release 2.x
Chapter 20 iSCSI Configuration
Configuring iSCSI Storage Name Services
Ethernet PortChannel-Based High Availability
Note All iSCSI data traffic for one iSCSI link is carried on one TCP connection. Consequently, the aggregated
bandwidth is 1 Gbps for that iSCSI link.
Figure 20-14 provides a sample Ethernet PortChannel-based high availability iSCSI configuration.
Figure 20-14 Ethernet PortChannel-Based iSCSI High Availability
In Figure 20-14, each iSCSI host discovers one iSCSI target for every physical Fibre Channel target. The
iSCSI session from the iSCSI host to the virtual iSCSI target (on the IPS port) uses one of the two
physical interfaces (because an iSCSI session uses one TCP connection). When the Gigabit Ethernet
interface fails, the IPS module and the Ethernet switch transparently forwards all the frames on to the
second Gigabit Ethernet interface.
Configuring iSCSI Storage Name Services
The Internet Storage Name Service (iSNS) client and server features are available in all switches in the
Cisco MDS 9000 Family with IPS modules installed.
iSNS services allow your existing TCP/IP networks to function more effectively as storage area networks
by automating the discover and management of iSCSI devices. To facilitate these functions, the iSNS
client functionality registers iSCSI portals and all targets accessible through a particular interface with
an external iSNS server.
This section includes the following topics:
• iSNS Client Functionality, page 20-25
• Enabling the iSNS Server, page 20-26
• Configuring the ESI Retry Count, page 20-26
Note Most tabs in the Information pane for features using CFS are dimmed until you click the CFS tab. The
CFS tab shows which switches have CFS enabled and shows the master switch for this feature. Once the
CFS tab is clicked, the other Information pane tabs that use CFS are activated.
IP
network
90863
Ethernet PortChannel
IP-10.1.1.1
iqn.host-2
FC fabric
pWWN-P1
pWWN-P2
iSCSI
HBA
iqn.host-1
iSCSI
HBA
FC