Cabletron Systems SmartSwitch manual Dynamic Configuration, Using Dynamic NAT

Chapter 14: Network Address Translation Configuration Guide

Dynamic Configuration

The following example configures a dynamic address binding for inside addresses 10.1.1.0/24 to outside address 192.50.20.0/24:

Outbound: Translate source pool 10.1.1.0/24 to global pool 192.50.20.0/24

			10.1.1.4
					Router
IP network 10.1.1.0/24								Global Internet
					et.2.1	et.2.2
	10.1.1.3	10.1.1.2		interface 10-net			interface 192-net
				(10.1.1.1/24)		(192.50.20.1/24)

The first step is to create the interfaces:

interface create ip 10-net address-netmask 10.1.1.1/24 port et.2.1 interface create ip 192-net address-netmask 192.50.20.1/24 port et.2.2

Next, define the interfaces to be NAT “inside” or “outside”:

nat set interface 10-net inside nat set interface 192-net outside

Then, define the NAT dynamic rules by first creating the source ACL pool and then configuring the dynamic bindings:

acl lcl permit ip 10.1.1.0/24

nat create dynamic local-acl-pool lcl global-pool 192.50.20.0/24

Using Dynamic NAT

Dynamic NAT can be used when the local network (inside network) is going to initialize the connections. It creates a binding at run time when a packet is sent from a local network, as defined by the NAT dynamic local ACl pool. The network administrator does not have to worry about the way in which the bindings are created; the network administrator just sets the pools and the SSR automatically chooses a free global IP from the global pool for the local IP.

228 SmartSwitch Router User Reference Manual