This topic describes the prerequisites that you must meet before you configure virtual loopback, null, and virtual IPv4 interfaces on the Cisco 8000 Series Router.
Before you configure virtual interfaces, ensure that you meet the following prerequisite:
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You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs that you need for each command. If you suspect a user group assignment is preventing you from using a command, contact your AAA administrator for assistance.