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    <title>Generation 1 PortChannel Limitations </title>
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<a name="wp1072890"> </a><h1 class="pTitle">
Generation 1 PortChannel Limitations

</h1>
<a name="wp1072891"> </a><p class="pBody">
This section includes the restrictions on creation and addition of PortChannel members to a PortChannel 
on Generation 1 hardware:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1072892"> </a><li class="pSmartList1">The 32-port 2-Gbps or 1-Gbps switching module.
</li>
<a name="wp1072893"> </a><li class="pSmartList1">The MDS 9140 and 9120 switches.
</li>
</ul></div>
<a name="wp1072894"> </a><p class="pBody">
When configuring the host-optimized ports on Generation 1 hardware, the following PortChannel 
guidelines apply:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1072895"> </a><li class="pSmartList1">If you execute the <b class="cBold">write erase</b> command on a 32-port switching module, and then copy a saved 
configuration to the switch from a text file that contains the <b class="cBold">no system default switchport 
shutdown</b> command, you need to copy the text file to the switch again for the E ports to come up 
without manual configuration.
</li>
<a name="wp1072896"> </a><li class="pSmartList1">Any (or all) full line rate port(s) in the Cisco MDS 9100 Series can be included in a PortChannel.
</li>
<a name="wp1072897"> </a><li class="pSmartList1">The host-optimized ports in the Cisco MDS 9100 Series are subject to the same PortChannel rules 
as 32-port switching modules; only the first port of each group of 4 ports is included in a 
PortChannel.
</li>
<div class="pSmartList2"><ul class="pSmartList2">
<a name="wp1072899"> </a><li class="pSmartList2">You can configure only the first port in each 4-port group as an E port (for example, the first port in ports 1–4, the fifth port in ports 5–8, and so on). If the first port in the group is configured as a PortChannel, the other three ports in each group (ports 2–4, 6–8, and so on) are not usable and remain in the shutdown state. </li>
<a name="wp1072900"> </a><li class="pSmartList2">If any of the other three ports are configured in a no shutdown state, you cannot configure the first port to be a PortChannel. The other three ports continue to remain in a no shutdown state.</li>
</ul></div>
</ul></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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