On Apr 6, 2012, at 4:44 PM, David Conrad wrote: > However, I would be interested in hearing what the excuses are for folks not > implementing BCP38 these days.
Easy: 1) hardare support varies 2) implementing bcp-38 drives customer support costs up in cases where the customer is doing something weird "e.g.: using toms isdn-dial backup to source return packets". 3) customers can't be trusted to give a complete list of valid source addresses 4) asymmetric or highly kinky routing exists more than one would like to admit There are cases where it's fairly inexcusable: Fixed broadband providers (static IP address or dynamic to a customer port/pool) CGN exit points Static routed customers (They shouldn't be doing asymmetric routing) The real reason imho.. is #2 above. desire to keep unnecessary support calls from your call center. - Jared
