The following items are components to configure basic router parameters:
Interface
A logical IP routing interface. When created, attributes like an IP address, port, link aggregation group, or the system can be associated with the IP interface.
Address
The address associates the device’s system name with the IP system address. An IP address must be assigned to each IP interface.
System interface
This creates an association between the logical IP interface and the system (loopback) address. The system interface address is the circuitless address (loopback) and is used by default as the router ID for protocols such as OSPF and BGP.
Router ID
(Optional) The router ID specifies the router's IP address.
Autonomous system
(Optional) An autonomous system (AS) is a collection of networks that are subdivided into smaller, more manageable areas.
Confederation
(Optional) Creates confederation-autonomous systems within an AS to reduce the number of IBGP sessions required within an AS.