ZyXEL Communications 1001H manual NAT Application, NAT Mapping Types

P100IH ISDN Router

Table 4-1 NAT Mapping Types

Type	IP Mapping
One-to-One	ILA1ÅÆ IGA1
Many-to-One (SUA/PAT)	ILA1ÅÆ IGA1
	ILA2ÅÆ IGA1
	…
Many-to-Many Overload	ILA1ÅÆ IGA1
	ILA2ÅÆ IGA2
	ILA3ÅÆ IGA1
	ILA4ÅÆ IGA2
	…
Many-to-Many No Overload	ILA1ÅÆ IGA1
	ILA2ÅÆ IGA2
	ILA3ÅÆ IGA3
	…
Server	Server 1 IPÅÆ IGA1
	Server 2 IPÅÆ IGA1
	Server 3 IPÅÆ IGA1

4.2NAT Application

The following figure illustrates a possible NAT application, where three inside LANs behind the Prestige can “talk” to three distinct Internet destinations. More examples follow at the end of this chapter.

NAT 4-3