Hi ,
It depends upon number for connection established from your private IP address ,if you except 10 concurrent connection from single private IP address , then 6400 no's private IP address can be mapped to single public IP address .
Single routable /Public IP address provides 64000 translations .
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If the mapped pool has fewer addresses than the real group, you might run out of addresses if the amount of traffic is more than expected. Use PAT if this event occurs often because PAT provides over 64,000 translations using ports of a single address.
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HTH
Sandy
