Configuring B Ports
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.
To enable B port mode using Fabric Manager, follow these steps:
From Device manager, choose IP > FCIP. You see the FCIP dialog box.
- Click the Tunnels tab.
- Click the Create Row icon in Fabric Manager or the Create button in Device Manager.
- Set the ProfileID and TunnelID fields.
- Set the RemoteIPAddress and RemoteTCPPort fields for the peer IP address you are configuring.
- Check the PassiveMode check box if you do not want this end of the link to initiate a TCP connection.
- Optionally set the NumTCPCon field to the number of TCP connections from this FCIP link.
- Check the Enable check box in the B Port section of the dialog box and optionally check the KeepAlive check box if you want a response sent to an ELS Echo frame received from the FCIP peer.
- Optionally set the other fields in this dialog box and click Create to create this FCIP link.
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