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Enter the vip command to assign a virtual IP address to the USTAT module:
vip 172.25.5.1
The VIP is the address that will receive traffic-measurement packets, either during a user traffic test (UTT) handshake or for an active probe. This address must be reachable from the Internet, so it should come from public address space (though examples throughout this document will use only private-space addresses for all interfaces, on both routers and xSeries devices).
If you need dedicated active measurement VIPs for your USTATs (see Chapter 4: Server-Based Measurement and Chapter 5: Configuring Agent-Based Measurement in the CNA Basic Monitoring Guide), you can configure that address here, as well.
The standard VIP can be used for both active probes and passive tests, however, so the active measurement VIP will not be configured as part of this example.
The xSeries system will implicitly append /32 to the address (the CIDR-notation equivalent of a subnet mask of 255.255.255.255). The mask won't show up in all output, but the show interface command for the USTAT module will include the following:
Link encap:Local Loopback inet addr:172.25.5.2 Mask:255.255.255.255
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