Active EIGRP Route

	Active EIGRP Route
	An active EIGRP route is the state in EIGRP routing when a network change occurs and a feasible successor is not found by a EIGRP router for a given route. In this case, the router goes into active state, and queries its neighbors for routing information to the desired network. The local router sets a Reply Status flag to track all the queries to its neighbor routers. If a neighbor has feasible successors, it will recalculate its own local distance to the network and send this back as an RD. If a neighbor does not have a feasible successor, then it will itself move into active state and query its neighbors. Sometimes, a router with an active EIGRP route can enter a "stuck in active" state when it cannot find a feasible successor due to lack of response from a neighbor router. In large, redundant networks, variations and errors in routing behavior can be very difficult to understand due to the complexity and rapidity of routing protocols. In addition, engineers need visibility into routing in order to ensure consistent delivery of application performance to their end users. Route analytics technology pioneered by Packet Design provides unique real-time visibility into EIGRP, OSPF, IS-IS and BGP routing behavior, and can be used to analyze EIGRP on a network-wide basis. Packet Design's Route Explorer provides unprecedented visibility and analysis features for EIGRP routing. Route Explorer EIGRP route analytics features include: Real-time, network-wide routing topology visualization and analysis, across multiple protocols and AS Full routing event history navigation -- Move back in time to analyze past EIGRP event streams exactly as they happened Tools for diagnosing common EIGRP problems such as: Neighbor adjacency issues Route advertisement problems Route installation difficulties Route flapping conditions Modeling and simulation of routing changes and failures for more accurate planning and maintenance operations Download EIGRP and other route analytics white papers here © 2007 Packet Design Inc., All Rights Reserved - Privacy Policy

An active EIGRP route is the state in EIGRP routing when a network change occurs and a feasible successor is not found by a EIGRP router for a given route. In this case, the router goes into active state, and queries its neighbors for routing information to the desired network. The local router sets a Reply Status flag to track all the queries to its neighbor routers. If a neighbor has feasible successors, it will recalculate its own local distance to the network and send this back as an RD. If a neighbor does not have a feasible successor, then it will itself move into active state and query its neighbors. Sometimes, a router with an active EIGRP route can enter a "stuck in active" state when it cannot find a feasible successor due to lack of response from a neighbor router.

In large, redundant networks, variations and errors in routing behavior can be very difficult to understand due to the complexity and rapidity of routing protocols. In addition, engineers need visibility into routing in order to ensure consistent delivery of application performance to their end users. Route analytics technology pioneered by Packet Design provides unique real-time visibility into EIGRP, OSPF, IS-IS and BGP routing behavior, and can be used to analyze EIGRP on a network-wide basis.

Packet Design's Route Explorer provides unprecedented visibility and analysis features for EIGRP routing. Route Explorer EIGRP route analytics features include:

Real-time, network-wide routing topology visualization and analysis, across multiple protocols and AS
Full routing event history navigation -- Move back in time to analyze past EIGRP event streams exactly as they happened
Tools for diagnosing common EIGRP problems such as:
- Neighbor adjacency issues
- Route advertisement problems
- Route installation difficulties
- Route flapping conditions
Modeling and simulation of routing changes and failures for more accurate planning and maintenance operations

Download EIGRP and other route analytics white papers here