Virtual IP Addresses
You can configure more than one IP address on each interface, as shown in Figure 9-3. This is one way that a large machine can pretend to be many smaller machines consolidated together. It is also used in high-availability failover situations. In earlier releases, up to 256 addresses could be configured on each interface. Some large virtual web sites found this limiting, and now a new ndd tunable in Solaris 2.6 can be used to increase that limit. Up to about 8,000 addresses on a single interface have been tested. Some work was also done to speed up ifconfig of large numbers of interfaces. You configure a virtual IP address by using ifconfig on the interface, with the number separated by a colon. Solaris 2.6 also allows groups ...
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