Routing Performance Under Large Clamp Down Timers
Large clamp down timers reduce update traffic for all triggering policies
Two different types of update triggering policies:
- Pruning: advertise values smaller than the maximum request size
- Non-pruning: never advertise values smaller than maximum request size, thus all links are feasible and only minimum hop paths are selected
Non-pruning policies can perform better under larger clamp downs, especially for large request sizes; they avoid costly routing mistakes
Pruning policies tend to make use of long alternate paths based on outdated information
Advertising quantized values improves routing performance since it allows discovery of multiple equal cost paths