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50-55
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 50 Configuring iSCSI
iSCSI High Availability
Figure 50-40 VRRP-Based iSCSI High Availability
In Figure 50-40, 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.
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 50-41 provides a sample Ethernet PortChannel-based high availability iSCSI configuration.
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
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