IPv6 Routing Protocols

The JUNOS software implements IP routing functionality, providing support for IP Version 6 (IPv6). The routing protocols have been developed to provide the scale and control necessary for the Internet core.

The software supports the following unicast routing protocols:

• IS-IS—Intermediate System-to-Intermediate System is a link-state interior gateway protocol (IGP) for IP networks that uses the shortest-path-first (SPF) algorithm, which also is referred to as the Djikstra algorithm, to determine routes. The JUNOS software supports a new and complete implementation of the protocol, addressing issues of scale, convergence, and resilience.
• RIP—Routing Information Protocol version 2 is an IGP for IP networks based on the Bellman-Ford algorithm. RIP is a distance-vector protocol. RIP dynamically routes packets between a subscriber and a service provider without the subscriber having to configure BGP or to participate in the service provider's IGP discovery process.
• ICMP—Internet Control Message Protocol router discovery allows hosts to discover the addresses of operational routers on the subnet.
• BGP—Border Gateway Protocol version 4, is an exterior gateway protocol (EGP) that guarantees loop-free exchange of routing information between routing domains (also called autonomous systems). BGP, in conjunction with JUNOS routing policies, provides a system of administrative checks and balances that can be used to implement peering and transit agreements.