241Network Layer: Introduction to the IP Protocol
• Router ID—species a unique router identier used by the Open Shortest
Path First (OSPF) routing protocol.
• Autonomous System Number—is a 16-bit number represented as an
integer value between 1 and 65535 that uniquely identies an autono-
mous system (AS) that this router belongs to. The AS number is typically
employed by the Border Gateway Protocol (BGP).
• Interface Information—is a compound attribute that species addressing
and routing information for each physical interface of this node.
• Aggregate Interfaces—is a compound attribute for conguring Link
Aggregation Control Protocol (LACP) by mapping multiple physical inter-
faces into a single logical or aggregate interface. This at ...