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20-23
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-6965-03, Cisco MDS SAN-OS Release 2.x
Chapter 20 iSCSI Configuration
Configuring iSCSI
VRRP-Based High Availability
Figure 20-13 provides an example of a VRRP-based high availability iSCSI configuration.
Figure 20-13 VRRP-Based iSCSI High Availability
In Figure 20-13, each iSCSI host discovers one iSCSI target for every physical Fibre Channel target.
When the Gigabit Ethernet interface of the VRRP master fails, the iSCSI session is terminated. The host
then reconnects to the target and the session comes up because the second Gigabit Ethernet interface has
taken over the virtual IP address as the new master.
Tip Ports that act as VRRP master and backup can be on different switches. If you have a static WWN
configuration for iSCSI initiators (see the “Presenting iSCSI Hosts as Virtual Fibre Channel Hosts”
section on page 20-11), configure a different WWN for the iSCSI initiator for each switch. If you use a
proxy initiator, be sure to configure a different pWWN on each iSCSI interface for each VRRP port used.
IP
network
90862
VRRP across two ports
Physical view (iSCSI)
Virtual IP-10.1.1.1
FC fabric
pWWN-P1
iqn.host-1
iSCSI
HBA
FC
lqn.com.cisco.mds.vr1.gw.p1
FC
lqn.com.cisco.mds.vr1.gw.p1
FC
Virtual IP-10.1.1.1
Network portal 10.1.1.1
iqn.host-1
iSCSI
HBA
IP
network
Logical view