International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
The demand for MPLS is increasing day-by-day in most internet service provider networks. Majority of the carriers are deploying MPLS in their backbone networks to facilitate a number of services and applications such as virtual private networks, Quality of Service (QoS) and traffic engineering. The most prime benefit provided by MPLS to an ISP network is the separation of routing from forwarding/switching via IP address header lookup. This paper provides an analysis of two commonly used IGP link-state routing protocols used to disseminate information about topology changes and restoration after a link failure and also comparison of OSPF with IS-IS is given.