JUNOS Enterprise Routing

Conclusion

The IGP is a critical component in any enterprise network. The IGP functions to provide optimal connectivity to interior destinations in the face of changing network conditions. To perform this function, the IGP must balance the opposing forces of rapid convergence against instability and routing loops. A well-designed and implemented IGP can easily spell the difference between a high-performing network and an ongoing litany of trouble tickets and support calls.

Historically, enterprise networks needed to support multiple routed protocols, and the dominance of Cisco Systems in these early years resulted in widespread deployment of its proprietary IGRP and EIGRP IGP solutions. Since that time, most enterprise networks have completed a migration to an all-IP routing infrastructure. Simply stated, the world seems to have settled on the mantra “IP over everything, and everything over IP.” Although EIGRP does a good job at routing IP, its closed nature, coupled with its lack of routing hierarchy and MPLS TE support, cast serious concerns over its future high-performance enterprise networks.

Over the years, several tried and proven strategies have been developed to ease the pain and disruption that often accompany IGP migration. Whether an enterprise chooses to deploy JUNOS software or not, these migration techniques can get your legacy network weaned off of EIGRP and onto an open standard such as OSPF.

Juniper Networks routers support all standardized IGPs, and their implementation ...