IS-IS and OSPF: Network Design Comparisons and ... - JANOG

Problems with Distance Vector
• Slow convergence
• A direct result of the distributed calculation
• Triggered updates help
• Kludges such as hold-down timers reduce transient errors,
but increase convergence time
• Single-hop routing loops
• Solution: split horizon
• Counting to infinity
• Solution: make infinity finite
• Synchronized periodic updates
• Solution: update jitter timers