Configuring Vrrp For Gigabit Ethernet Interfaces; About Ethernet Portchannel Aggregation - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Cisco mds 9000 family fabric manager configuration guide, release 3.x (ol-8222-10, april 2008)

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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

Configuring VRRP for Gigabit Ethernet Interfaces

The VRRP preempt option is not supported on IPS Gigabit Ethernet interfaces. However, if the virtual

IPv4 address is also the IPv4 address for the interface, then preemption is implicitly applied.

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.

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.

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

Configuring Gigabit Ethernet High Availability

Cisco MDS 9000 Family CLI Configuration Guide