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Chapter 24
Configuring IP Storage
Figure 24-4
IPS module
IPS module
In
Figure
members can be one or more of the following interfaces:
•
•
•
•
•
•
The VRRP preempt option is not supported on IP storage Gigabit Ethernet interfaces. However, if the
virtual IP address is also the IP address for the interface, then preemption is implicitly applied.
Configuring Ethernet PortChannels
Ethernet PortChannels refer to the aggregation of multiple physical Gigabit Ethernet interfaces into one
logical Ethernet interface to provide link redundancy and, in some cases, higher aggregated bandwidth
and load balancing.
The data traffic from one TCP connection always travels on the same physical links. An Ethernet switch
connecting to the MDS Gigabit Ethernet port can implement load balancing based on its IP address, its
source-destination MAC address, or its IP and port. In iSCSI scenarios if the Ethernet switch is not
capable of load-balancing based on the IP address or the IP port, multiple iSCSI initiators are required
to take advantage of the Ethernet PortChannel feature.
The Cisco Ethernet switch's PortChannel should be configured as a static PortChannel, and not the
default 802.3aa protocol.
Ethernet PortChannels can only aggregate two physical interfaces that are adjacent to each other on a
given IPS module.
OL-7753-01
VRRP Scenario
Switch 1
10.1.1.10
VRRP master
10.1.1.30
VRRP backup
Switch 2
24-4, all members of the VRRP group must be IP storage Gigabit Ethernet ports. VRRP group
One or more interfaces in the same IPS module
Interfaces across IPS modules in one switch
Interfaces across IPS modules in different switches
Gigabit Ethernet subinterfaces
Ethernet PortChannels
Subinterfaces
VRRP group
virtual IP 10.1.1.100
L2 switch
IP network
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
Configuring Gigabit Ethernet Interfaces
Connect to
10.1.1.100
24-5
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