vip

Specifies a virtual IP address (VIP) for a USTAT module.

vip [ name <name> | active-measurement ] <address> [ device loopback ]
 
no vip [ <address> | name <name> | active-measurement ]
 

• name--name of VIP
• address--IP address, in dotted decimal form (a.b.c.d)

Must be in USTAT configuration mode (config-ustat), which requires privileged-level access.

Available for use multiple times in the configuration.

The vip command is used to designate an IP address for the USTAT web server.

You can have only one web-server VIP on a USTAT.

The name argument should be a unique string that meets the criteria described in the section Legal Characters in Chapter 1: Introduction to the Command Line Interface.

In addition to a web-server VIP, you can have one unnamed active-measurement VIP and several named active-measurement VIPs on the same USTAT:

• Unnamed active-measurement VIPs--Use the active-measurement keyword to create a VIP (virtual IP address) for the exclusive use of active probes, so that acknowledgement packets can bypass firewalls and load balancers which might otherwise drop them. Use an IP address that is reachable from the Internet but is unknown to your load balancer.
• Named active-measurement VIPs--Use the name keyword to create a named active-measurement VIP. Once you have created a named VIP on each of your USTATs, use the use named-vip command in an active measurement group to direct probes from that group to the appropriately named VIP. You can have multiple named VIPs on a single USTAT in order to selectively change the IP address used for different probe groups.

If neither a named nor an unnamed active-measurement VIP is defined, the USTAT will send active probes through the regular VIP.

VIP addresses are by default associated with the USTAT’s Ethernet interface. In releases prior to 2.3, VIPs were associated with the loopback interface by default.

Because of the new implementation, the USTAT will now respond to an ARP request for the VIP address.

If you prefer the VIP to be associated with the USTAT’s loopback interface as in earlier versions, include the device loopback option in the command.

Use the no form of the command with an address argument to remove a web-server VIP from a USTAT.

Use the no form of the command with the name argument (and its value) to remove a specified named VIP from a USTAT.

Use the no form of the command with the active-measurement keyword to remove an unnamed active-measurement VIP from a USTAT.