Sites with multiple routers and networks typically administer their network topology as a single routing domain or an autonomous system (AS). Autonomous System With Multiple IPv4 Routers shows an AS that is divided into three local networks: 203.0.113.0, 198.51.100.0, and 192.0.2.0.
The network is comprised of the following types of systems:
Router use routing protocols to manage how network packets are directed or routed from their source to their destinations within the local network or to external networks. For information about the routing protocols that are supported in Oracle Solaris and instructions on configuring a system as a router, see Routing Protocols in Configuring an Oracle Solaris 11.4 System as a Router or a Load Balancer.
The different types of routers are:
Default routers – Manage packet routing in the local network, which itself can include several local networks. For example, in Autonomous System With Multiple IPv4 Routers, Router 1 serves as the default router for 192.0.2.0. Contemporaneously, Router 1 is also connected to the 203.0.113.0 internal network. Router 2's interfaces connect to the 203.0.113.0 and 198.51.100.0 internal networks.
Packet-forwarding routers – Forward packets between internal networks but do not run routing protocols. In Autonomous System With Multiple IPv4 Routers, Router 3 is a packet-forwarding router with connections to the 198.51.100.0 and 192.0.2.0 networks.
Use the following figure as a reference when configuring additional network components.
Figure 3 Autonomous System With Multiple IPv4 Routers