Configuring IP Storage
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
If you configure secondary VRRP IPv6 addresses on an IPFC VSAN interface, before a downgrading to
a release prior to Cisco Release 3.0(1), you must remove the secondary VRRP IPv6 addresses. This is
required only when you configure IPv6 addresses.
The VRRP preempt option is not supported on IPS Gigabit Ethernet interfaces. However, if the virtual
IP address is also the IP address for the interface, then preemption is implicitly applied.
About Ethernet PortChannel Aggregation
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
An Ethernet switch connecting to the MDS switch Gigabit Ethernet port can implement load balancing
based on the IP address, IP address and UDP/TCP port number, or MAC address. Due to the load
balancing scheme, the data traffic from one TCP connection is always sent out on the same physical
Gigabit Ethernet port of an Ethernet PortChannel. For the traffic coming to the MDS, an ethernet switch
can implement load balancing based on its IP address, its source-destination MAC address, or its IP
address and port. The data traffic from one TCP connection always travels on the same physical links.
To make use of both ports for the outgoing direction, multiple TCP connections are required.
All FCIP data traffic for one FCIP link is carried on one TCP connection. Consequently, the aggregated
bandwidth is 1 Gbps for that FCIP link.
The Cisco Ethernet switch's PortChannel should be configured as a static PortChannel, and not the
default 802.3ad protocol.
Ethernet PortChannels can only aggregate two physical interfaces that are adjacent to each other on a
given IPS module (see
PortChannel members must be one of these combinations: ports 1–2, ports 3–4, ports 5–6, or ports 7–8.
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Configures the priority for the selected interface within
this VRRP group.
Enables the VRRP protocol on the selected interface.
Configuring Gigabit Ethernet High Availability
The interface with the highest priority is selected
as the master.
Cisco MDS 9000 Family CLI Configuration Guide