To see a sample configuration that shows hub and spoke encryption from one router (the "hub") to three other routers (the " spokes "), visit http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008009463b.shtml.
To see a sample configuration that shows fully meshed encryption between three routers, check out http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008014f8ab.shtml.
To see a sample configuration that illustrates a router configured for wildcard preshared keys (where all PC clients share a common key), visit the Web sitehttp://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008009488e.shtml.
To see a sample configuration that shows hub and spoke encryption from one router (the "hub") to three other routers (the " spokes "), visit http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a008009463b.shtml. 