
Configuring Network Address Translation
117356-B Rev. 00
12-9
NAT can perform either or both of the following types of mapping:
• Static address mapping
• Dynamic address mapping
Static mapping creates a one-to-one mapping of an unregistered local host address
to a global address. If you want to preserve a mapping entry, use static mapping.
Static address mapping does not time out during periods when there is no traffic
on the interface. The mapping remains configured until you disable it.
Dynamic mapping creates a temporary mapping of an unregistered address to a
global address. NAT software selects a global address from one or more global
address pools that you configure, and maps this address to the unregistered
address. If you enabled the Mapping Entry Timeout parameter, the mapping
remains configured for the time you specify in the Max Timeout parameter.
Otherwise, the mapping remains configured until you disable it.
For instructions on how to create and enable static mapping, refer to “
Configuring
Static Mapping” on page 12-17.
For instructions on how to create and enable dynamic mapping, see the following
sections: “Configuring Dynamic Local Address Ranges
” on page 12-19 and
“Configuring Dynamic Global Address Ranges” on page 12-22.
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