User's Manual

Configuring GRE, NAT, RIPSO, and BFE Services
2-12
308625-14.00 Rev 00
To configure a local address range, navigate to the global NAT prompt (for
example,
box; ip; nat) and enter:
nat# local-range <address>/<mask>
address
is the base local address expressed in dotted-decimal notation.
mask is the prefix length associated with the IP address expressed in decimal
notation.
Specifying a Global Address Range for NAT Translation
The global address range tells the router which registered global addresses to use
when translating local addresses. You must configure at least one global address
range.
The global address range is specified as a base address and a prefix length (from 1
through 32 decimal). The prefix length determines the number of available global
addresses. For example, if the base address is 197.1.2.0 and its prefix length is 24
(255.255.255.0), then the address range you specify includes addresses 197.1.2.0
through 197.1.2.255.
To configure a global address range, navigate to the global NAT prompt (for
example,
box; ip; nat) and enter:
nat# global-range <address>/<mask>
address
is the base global IP address expressed in dotted-decimal notation.
mask is the prefix length associated with the IP address expressed in decimal
notation.
Configuring a Local NAT Interface
The local interface is connected to the internal network that includes the networks
within the local address range. The router performs address translation only on
packets from local hosts included in the local address range.
To specify the local NAT interface, navigate to the appropriate IP interface prompt
(for example,
box; ethernet/2/2; ip/192.132.45.3/255.255.255.0) and enter:
nat