PfR:Simplification

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IOS 15.2(3)T and IOS-XE 3.6

As part of the simplification initiative, IOS 15.2(3)T brings a lot of changes. Table below summarizes the changes for load-balancing and resolvers.


Current Solution After 15.2(3)T / XE 3.6
Support utilization and range resolvers Remove utilization and range resolvers
Automatic learning disabled Automatic learning enabled by default (reports every minute, forever)
Mode route control disabled Mode route control on by default
Delay, range, utilization resolvers are the default resolvers Load-balancing is used as the last resolver and cannot be disabled. Resolver range and utilization removed.
Do random resolver for all qualified exits that satisfy the configured criteria Do load balancing for all qualified exits that satisfy the configured criteria then random selection
Cost resolver can be configured with a higher priority than performance resolver in a policy No priority option for resolver cost-min. It is always handled after any performance resolver
Trigger range OOP by comparing the load of an exit to all other exits. Trigger range OOP by comparing the load of an exit to all other exits in the same group.
Check the soft limit before calling the resolver Check soft limit of all exits before entering the resolver. If none of exits are below the limit, make selection by ignoring the soft limit.


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