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SmartSwitch Router User Reference Manual 231
Chapter 14: Network Address Translation Configuration Guide
Next, define the interfaces to be NAT “inside” or “outside”:
Then, define the NAT dynamic rules by first creating the source ACL pool and then
configuring the dynamic bindings:
Using Dynamic NAT with Matching Interface Redundancy
If you have redundant connections to the remote network via two different interfaces, you
can use NAT for translating the local address to the different global pool specified for the
two connections. This case is possible when you have two ISPs connected on two different
interfaces to the Internet. Through a routing protocol, some routes will result in traffic
going out of one interface and for others going out on the other interface. NAT will check
which interface the packet is going out from before selecting a global pool. Hence, you can
specify two different global pools with the same local ACL pool on two different
interfaces.
nat set interface 10-net inside
nat set interface 192-net outside
nat set interface 201-net outside
acl lcl permit ip 10.1.1.0/24
nat create dynamic local-acl-pool lcl global-pool 192.50.20.0/24 matching-
if 192-net
nat create dynamic local-acl-pool lcl global-pool 210.50.20.0/24 matching-
if 201-net