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46 Fabric OS FCIP Administrator’s Guide

53-1002474-01

Creating a multicircuit tunnel (example)

This section provides procedures and applicable commands to create a tunnel containing six

circuits between two switches or blades. Figure 13 illustrates an example of these circuits between

two FX8-24 blades inside a DCX chassis.

FIGURE 13 FCIP tunnel example with six circuits

Although six circuits per tunnel are configured in the example and six circuits is the maximum for

the 7800 switch or FX8-24 blade, you can create less circuits if you desire. To create multiple

tunnels, simply configure tunnels and circuits for these tunnels. For details, refer to the following

sections of this guide:

• “Configuring a GbE or XGE port IP address” on page 36

• “Configuring an IP route” on page 37

• “Creating an FCIP tunnel” on page 38

• “Creating additional FCIP circuits” on page 44

To create a tunnel between two switches or blades, you must first understand the IP network

infrastructure between the sites. Each circuit requires a pair of IP interface addresses (either IPv4

or IPv6). Therefore, to create an FCIP Tunnel with six circuits, you need 12 IP addresses: six for the

site A switch and six for the site B switch. In the simplest configuration (non-routed), the IP

addresses can all be on the same IP subnet. In routed configurations, you will also define IP routes

(IP gateway addresses). In the following example, six different IP subnets are used, although this is

not a requirement.

Use the following steps for the multicircuit tunnel example illustrated in Figure 13 on page 46.

1. Assign IP addresses to each switch GbE port using the portcfg ipif command. The portcfg ipif

command requires the IP address, subnet mask, and the MTU for that IP interface. The

following examples show how to create the IP interfaces (IPIFs) for this configuration.

Site A

portcfg ipif ge0 create 192.168.0.63 255.255.255.0 1500

portcfg ipif ge1 create 192.168.1.63 255.255.255.0 1500

portcfg ipif ge2 create 192.168.2.63 255.255.255.0 1500

portcfg ipif ge3 create 192.168.3.63 255.255.255.0 1500

portcfg ipif ge4 create 192.168.4.63 255.255.255.0 1500

portcfg ipif ge5 create 192.168.5.63 255.255.255.0 1500

GbE0

GbE1

GbE2

GbE3

GbE4

GbE5

Circuit

Switch 64

Site B

Switch 63