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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 6 Configuring PortChannels
Information About PortChannels
PortChannels Overview
PortChannels refer to the aggregation of multiple physical interfaces into one logical interface to provide
higher aggregated bandwidth, load balancing, and link redundancy (See
Figure 6-1). PortChannels can
connect to interfaces across switching modules, so a failure of a switching module cannot bring down
the PortChannel link.
Figure 6-1 PortChannel Flexibility
PortChannels on Cisco MDS 9000 Family switches allow flexibility in configuration. This illustrates
three possible PortChannel configurations:
• PortChannel A aggregates two links on two interfaces on the same switching module at each end of
a connection.
• PortChannel B also aggregates two links, but each link is connected to a different switching module.
If the switching module goes down, traffic is not affected.
• PortChannel C aggregates three links. Two links are on the same switching module at each end,
while one is connected to a different switching module on switch 2.
E PortChannels
An E PortChannel refers to the aggregation of multiple E ports into one logical interface to provide higher
aggregated bandwidth, load balancing, and link redundancy. PortChannels can connect to interfaces across
switching modules, so a failure of a switching module cannot bring down the PortChannel link.
A PortChannel has the following features and restrictions:
• Provides a point-to-point connection over ISL (E ports) or EISL (TE ports). Multiple links can be
combined into a PortChannel.
• Increases the aggregate bandwidth on an ISL by distributing traffic among all functional links in the
channel.
• Load balances across multiple links and maintains optimum bandwidth utilization. Load balancing
is based on the source ID, destination ID, and exchange ID (OX ID).
Switch 1 Switch 2
PortChannel A
PortChannel B
PortChannel C
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