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Understanding NAT Source Pools with PAT

Using the source pool with Port Address Translation (PAT), JUNOS software translates both the source IP address and the port number of the packets. Using PAT, multiple hosts can share the same IP address.

Before You Begin
For background information, read Source IP Address Translation Overview.

JUNOS software maintains a list of assigned port numbers to distinguish what session belongs to which host. When PAT is enabled, up to 64,500 hosts can share a single IP address. Each source pool can contain multiple IP addresses, multiple IP address ranges, or both. For a source pool with PAT, JUNOS software may assign different addresses to a single host for different concurrent sessions, unless the source pool or JUNOS software has the persistent address feature enabled.

This topic covers:

Port Ranges
Address Persistent
Related Topics

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