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Brocade Fabric OS FCIP Administrator's Guide v7.1.0 (53-1002748-01, March 2013)

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Fabric OS FCIP Administrator’s Guide 3
53-1002748-01
IP WAN network considerations
1
FIGURE 1 FCIP tunnel concept and TCP/IP layers
Each FCIP tunnel is assigned to a single VE_Port and supports a single circuit. The circuit provides
the link for traffic between the source and destination IP addresses on either end of the tunnel.
Since a switch can support multiple VE_Ports, multiple FCIP tunnels can be created.
FCIP Trunking is a method for managing the use of WAN bandwidth and providing redundant paths
over the WAN that can protect against transmission loss due to WAN failure. A trunk is enabled by
creating multiple logical circuits within an FCIP tunnel to carry traffic between multiple source and
destination addresses.
For more information on FCIP tunnel, and trunking concepts for Brocade products, refer to Chapter
2, “FCIP on the 7800 Switch and FX8-24 Blade”.
IP WAN network considerations
Because FCIP uses TCP connections over an existing wide area network, consult with the WAN
carrier and IP network administrator to ensure that the network hardware and software equipment
operating in the data path can properly support the TCP connections. Keep the following
considerations in mind:
• Routers and firewalls that are in the data path must be configured to pass FCIP traffic (TCP
port 3225) and IPsec traffic, if IPsec is used (UDP port 500).
• To enable recovery from a WAN failure or outage, be sure that diverse, redundant network
paths are available across the WAN.
• Be sure the underlying WAN infrastructure is capable of supporting the redundancy and
performance expected in your implementation.