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    <title>Generation 1 Interface Configuration Guidelines </title>
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<a name="wp1075051"> </a><h1 class="pTitle">
Generation 1 Interface Configuration Guidelines

</h1>
<a name="wp1075052"> </a><p class="pBody">
The Generation 1 interfaces configuration guidelines apply to the following hardware:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1075053"> </a><li class="pSmartList1">The 32-port, 2-Gbps or 1-Gbps switching module interfaces
</li>
<a name="wp1075054"> </a><li class="pSmartList1">The Cisco MDS 9140 and 9120 switch interfaces
</li>
<a name="wp1075055"> </a><p class="pBodyAutonumRel">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> Due to the hardware design of the MDS 9134 switch, we do not support interface 
out-of-service action on either of its two 10-Gigabit ports. This is because no internal port 
hardware resource is released when an out-of-service action is performed on these 
10-Gigabit ports.

</p>
</ul></div>
<a name="wp1075057"> </a><p class="pBody">
When configuring these host-optimized ports, the following port mode guidelines apply: 

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1075058"> </a><li class="pSmartList1">You can configure only the first port in each 4-port group (for example, the first port in ports 1-4, 
the fifth port in ports 5-8, and so on) as an E port. If the first port in the group is configured as an E 
port, the other three ports in each group (ports 2-4, 6-8, and so on) are not usable and remain 
shutdown. 
</li>
<a name="wp1075060"> </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="wp1075061"> </a><li class="pSmartList1">If any of the other three ports are enabled, you cannot configure the first port as an E port. The other 
three ports continue to remain enabled.
</li>
<a name="wp1075062"> </a><li class="pSmartList1">The auto mode is not allowed in a 32-port switching module or the host-optimized ports in the Cisco 
9100 Series (16 host-optimized ports in the Cisco MDS 9120 switch and 32 host-optimized ports in 
the Cisco MDS 9140 switch).
</li>
<a name="wp1075064"> </a><li class="pSmartList1">The default port mode is Fx (Fx negotiates to F or FL) for 32-port switching modules. 
</li>
<a name="wp1075065"> </a><li class="pSmartList1">The 32-port switching module does not support FICON.
</li>
</ul></div>
<a name="wp1075066"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> We recommend that you configure your E ports on a 16-port switching module. If you must configure 
an E port on a 32-port host-optimized switching module, the other three ports in that 4-port group cannot 
be used.

</p>
<a name="wp1075067"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> In the Cisco MDS 9100 Series, the groups of ports that are located on the left and outlined in white are 
full line rate. The other ports are host-optimized. Each group of 4 host-optimized ports have the same 
features as for the 32-port switching module.

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

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