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Chapter 7 LAN Setup
P-660H-T1v3s User’s Guide
103
The Any IP feature does not apply to a computer using either a dynamic IP
address or a static IP address that is in the same subnet as the P-660H-T1v3s’s IP
address.
Note: You must enable NAT/SUA to use the Any IP feature on the P-660H-T1v3s.
How Any IP Works
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol
address (IP address) to a physical machine address, also known as a Media Access
Control or MAC address, on the local area network. IP routing table is defined on
IP Ethernet devices (the P-660H-T1v3s) to decide which hop to use,
to help
forward data along to its specified destination.
The following lists out the steps taken, when a computer tries to access the
Internet for the first time through the P-660H-T1v3s.
1 When a computer (which is in a different subnet) first attempts to access the
Internet, it sends packets to its default gateway (which is not the P-660H-T1v3s)
by looking at the MAC address in its ARP table.
2 When the computer cannot locate the default gateway, an ARP request is
broadcast on the LAN.
3 The P-660H-T1v3s receives the ARP request and replies to the computer with its
own MAC address.
4 The computer updates the MAC address for the default gateway to the ARP table.
Once the ARP table is updated, the computer is able to access the Internet
through the P-660H-T1v3s.
5 When the P-660H-T1v3s receives packets from the computer, it creates an entry in
the IP routing table so it can properly forward packets intended for the computer.
After all the routing information is updated, the computer can access the P-660H-
T1v3s and the Internet as if it is in the same subnet as the P-660H-T1v3s.