Address Allocation (cont.)
Address Allocation (cont.)
- NAT gets a block of “outside local addresses” that doesn’t overlap with:
(a) addresses used for internal allocation, and(b) the address block(s) obtained from the provider(s) connected to the NAT (inside global addresses)
- Reachability to the “outside local address” blocks is injected into the subscriber’s routing
- attracts outgoing traffic to a particular NAT
- even in the presence of changes in interior (wrt enterprise) routing