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    <title>Configuring B Ports </title>
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<a name="wp1076249"> </a><h1 class="pTitle">
Configuring B Ports

</h1>
<a name="wp1076250"> </a><p class="pBody">
While E ports typically interconnect Fibre Channel switches, some SAN extender devices, such as            
Cisco’s PA-FC-1G Fibre Channel port adapter and the SN 5428-2 storage router, implement a bridge port 
model to connect geographically dispersed fabrics. This model uses B port as described in the T11 
Standard FC-BB-2. B ports bridge Fibre Channel traffic from a local E port to a remote E port without 
participating in fabric-related activities such as principal switch election, domain ID assignment, and 
Fibre Channel fabric shortest path first (FSPF) routing. The IPS module and MPS-14/2 module support 
FCIP links that originate from a B port SAN extender device by implementing the B access ISL protocol 
on a Gigabit Ethernet interface.

</p>
<a name="wp1076252"> </a><p class="pBody">
When an FCIP peer is a SAN extender device that only supports Fibre Channel B ports, you need to 
enable the B port mode for the FCIP link. When a B port is enabled, the E port functionality is also 
enabled and they coexist. If the B port is disabled, the E port functionality remains enabled.

</p>
<a name="wp1101791"> </a><h2 class="pHeading2">
Detailed Steps
</h2>
<a name="wp1152857"> </a><p class="pBody">
To enable B port mode, follow these steps:

</p>
<div class="pSmartList1"><ol type="1" class="pSmartList1">
<a name="wp1152858"> </a><li class="pSmartList1">Choose <span style="font-weight: bold">ISLs &gt; FCIP</span> from the Physical Attributes pane. 
</li>
<a name="wp1152859"> </a><p class="pListBodyLevel1">
You see the FCIP profiles and links in the Information pane.

</p>
</ol></div>
<a name="wp1152860"> </a><p class="pBody">
From Device Manager, choose <span style="font-weight: bold">IP &gt; FCIP</span>. You see the FCIP dialog box.

</p>
<div class="pSmartList1"><ol type="1" class="pSmartList1">
<a name="wp1152861"> </a><li class="pSmartList1">Click the <span style="font-weight: bold">Tunnels </span>tab. 
</li>
<a name="wp1152862"> </a><p class="pListBodyLevel1">
You see the FCIP link information.

</p>
<a name="wp1152863"> </a><li class="pSmartList1">Click the <span style="font-weight: bold">Create Row</span> icon in DCNM-SAN or the <span style="font-weight: bold">Create</span> button in Device Manager. 
</li>
<a name="wp1152864"> </a><p class="pListBodyLevel1">
You see the FCIP Tunnels dialog box.

</p>
<a name="wp1152865"> </a><li class="pSmartList1">Set the ProfileID and TunnelID fields.
</li>
<a name="wp1152866"> </a><li class="pSmartList1">Set the RemoteIPAddress and RemoteTCPPort fields for the peer IP address you are configuring.
</li>
<a name="wp1152867"> </a><li class="pSmartList1">Check the <span style="font-weight: bold">PassiveMode</span> check box if you do not want this end of the link to initiate a TCP connection.
</li>
<a name="wp1152868"> </a><li class="pSmartList1">(Optional) Set the NumTCPCon field to the number of TCP connections from this FCIP link.
</li>
<a name="wp1152869"> </a><li class="pSmartList1">Check the <span style="font-weight: bold">Enable</span> check box in the B Port section of the dialog box and optionally check the <span style="font-weight: bold">KeepAlive</span> 
check box if you want a response sent to an ELS Echo frame received from the FCIP peer.
</li>
<a name="wp1152870"> </a><li class="pSmartList1">(Optional) Set the other fields in this dialog box and click <span style="font-weight: bold">Create</span> to create this FCIP link.
</li>
</ol></div>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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