Dealing with Routes within a Junos OS Based Router
Gonzalo Gómez Herrero, Jan Antón Bernal van der Ven · 2010
This chapter focuses primarily on routing and addressing for the Internet Protocol version 4 (IPv4) and illustrates Junos operating system configuration options that can leverage and optimize route manipulation among different routing tables. The underlying concepts presented only for IPv4 here can be generalized to other address families. In Junos OS routing architecture, the routing table is the central repository for routing information. The Junos OS routing architecture supports multiple routing instances, each with its collection of Routing Information Base (RIB) tables, interfaces, and routing protocols. For a PE router in the MPLS L3VPN architecture, the routing information that populates its local VRFs and which is learned from remote Provider Edge (PE) routers has to be advertised to the CEs. Junos OS architecture allows packet filters to be applied at different stages during the packet’s march through the system. Controlled Vocabulary Terms network operating systems; packet loss; routing protocols