I've been thinking through the implications of the NAT application
scenarios presented in my E-mail of 21 November ("NAT MIB: compliance
levels"). One of them is that the large-scale NAT application, even
though it does not understand individual subscribers, must have a means
to classify received packets into address realms. The conclusion is that
the packet classification criteria represented by
natSubscriberIdentifierType, natSubscriberVlanIdentifier, etc. in the
-11 version of the NAT MIB draft should be pulled out of
natSubscribersTable and put into a separate realm table. My instinct is
to make this NAT instance specific, in that:
-- different NAT instances on the same device may support different realms
-- different NAT instances may use different criteria to distinguish the
same realms, as a kind of load-sharing control
Comments?
Tom Taylor
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