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    <title>Trunk-Allowed VSAN Lists and VF_IDs </title>
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<a name="wp1074086"> </a><h1 class="pTitle">
Trunk-Allowed VSAN Lists and VF_IDs

</h1>
<a name="wp1074087"> </a><p class="pBody">
Each Fibre Channel interface has an associated trunk-allowed VSAN list. In TE-port mode, frames are 
transmitted and received in one or more VSANs specified in this list. By default, the VSAN range (1 
through 4093) is included in the trunk-allowed list. 

</p>
<a name="wp1074088"> </a><p class="pBody">
The common set of VSANs that are configured and active in the switch are included in the trunk-allowed 
VSAN list for an interface, and they are called <em class="cEmphasis">allowed-active</em> VSANs. The trunking protocol uses the 
list of allowed-active VSANs at the two ends of an ISL to determine the list of operational VSANs in 
which traffic is allowed.

</p>
<a name="wp1074092"> </a><p class="pBody">
Switch 1 has VSANs 1 through 5, switch 2 has VSANs 1 through 3, and switch 3 has VSANs 1, 2, 4, 
and 5 with a default configuration of trunk-allowed VSANs. All VSANs configured in all three switches 
are allowed-active. However, only the common set of allowed-active VSANs at the ends of the ISL 
become operational.

</p>
<a name="wp1074096"> </a><p class="pBody">
For all F, N, and NP ports, the default VF_ID is 1 when there is no VF_ID configured. The trunk-allowed 
VF_ID list on a port is same as the list of trunk-allowed VSANs. VF_ID 4094 is called the control VF_ID 
and it is used to define the list of trunk-allowed VF-IDs when trunking is enabled on the link.

</p>
<a name="wp1074097"> </a><p class="pBody">
If F port trunking and channeling is enabled, or if <b class="cBold">switchport trunk mode on</b> is configured in NPV mode 
for any interface, or if NP PortChannel is configured, the VSAN and VF-ID ranges available for the 
configuration are as described in <a href="trnk08.html#wp1074104">Table&#160;9-3</a>.

</p>
<a name="wp1074135"> </a><p class="pBodyRelative">
</p><div>
<table border="2" cellpadding="2" id="wp1074104table1074101">
  <caption><a name="wp1074104"> </a><div class="pTableTitle">
Table&#160;9-3	VSAN and VF-ID Reservations

</div>
</caption>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th><a name="wp1074108"> </a><p class="pCellHeading">
VSAN or VF-ID

</p>
</th>
    <th><a name="wp1074110"> </a><p class="pCellHeading">
Description

</p>
</th>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074112"> </a><p class="pBody">
000h

</p>
</td>
    <td><a name="wp1074114"> </a><p class="pBody">
Cannot be used as virtual fabric identifier.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074116"> </a><p class="pBody">
001h(1) to EFFh(3839)

</p>
</td>
    <td><a name="wp1074118"> </a><p class="pBody">
This VSAN range is available for user configuration.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074120"> </a><p class="pBody">
F00h(3840) to FEEh(4078)

</p>
</td>
    <td><a name="wp1074122"> </a><p class="pBody">
Reserved VSANs and they are not available for user 
configuration.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074124"> </a><p class="pBody">
FEFh(4079)

</p>
</td>
    <td><a name="wp1074126"> </a><p class="pBody">
EVFP isolated VSAN.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074128"> </a><p class="pBody">
FF0h(4080) to FFEh(4094)

</p>
</td>
    <td><a name="wp1074130"> </a><p class="pBody">
Used for vendor-specific VSANs.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1074132"> </a><p class="pBody">
FFFh 

</p>
</td>
    <td><a name="wp1074134"> </a><p class="pBody">
Cannot be used as virtual fabric identifier.

</p>
</td>
</tr>
</table>
</div>
<p class="pBodyRelative">
</p>
<a name="wp1074136"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> If the VF_ID of the F port and the N port do not match, then no tagged frames can be exchanged.

</p>
<a name="wp1074143"> </a><p class="pBody">
You can configure a select set of VSANs (from the allowed-active list) to control access to the VSANs 
specified in a trunking ISL. 

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

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