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    <title>About Ethernet PortChannel Aggregation </title>
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<a name="wp1074161"> </a><h1 class="pTitle">
About Ethernet PortChannel Aggregation

</h1>
<a name="wp1074162"> </a><p class="pBody">
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. 

</p>
<a name="wp1074164"> </a><p class="pBody">
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.

</p>
<a name="wp1074165"> </a><p class="pBody">
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. 

</p>
<a name="wp1074166"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> The Cisco Ethernet switch’s PortChannel should be configured as a static PortChannel, and not the 
default 802.3ad protocol.

</p>
<a name="wp1086589"> </a><p class="pBody">
Ethernet PortChannels can only aggregate two physical interfaces that are adjacent to each other on a 
given IPS module . 

</p>
<a name="wp1074172"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> PortChannel members must be one of these combinations: ports 1–2, ports 3–4, ports 5–6, or ports 7–8.

</p>
<a name="wp1074183"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> PortChannel interfaces provide configuration options for both Gigabit Ethernet and Fibre Channel. 
However, based on the PortChannel membership, only Gigabit Ethernet parameters or Fibre Channel 
parameters are applicable. 

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<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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