jared at puck.nether.net
Fri Apr 6 15:49:48 CDT 2012
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.
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.
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