ZyXEL Communications P-660RU-T V2 사용자 설명서

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Chapter 3 Wizard Setup
P-660RU-T v2 User’s Guide
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3.2.1.1  IP Assignment with PPPoA or PPPoE Encapsulation
If you have a dynamic IP, then the IP Address and ENET ENCAP Gateway fields are not 
applicable (N/A). If you have a static IP, then you only need to fill in the IP Address field and 
not the ENET ENCAP Gateway field.
3.2.1.2  IP Assignment with RFC 1483 Encapsulation
In this case the IP Address Assignment must be static with the same requirements for the IP 
Address
 and ENET ENCAP Gateway fields as stated above.
3.2.1.3  IP Assignment with ENET ENCAP Encapsulation
In this case you can have either a static or dynamic IP. For a static IP you must fill in all the IP 
Address
 and ENET ENCAP Gateway fields as supplied by your ISP. However for a 
dynamic IP, the ZyXEL Device acts as a DHCP client on the WAN port and so the IP 
Address
 and ENET ENCAP Gateway fields are not applicable (N/A) as the DHCP server 
assigns them to the ZyXEL Device.
3.2.1.4  Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are isolated from 
the Internet, for example, only between your two branch offices, you can assign any IP 
addresses to the hosts without problems. However, the Internet Assigned Numbers Authority 
(IANA) has reserved the following three blocks of IP addresses specifically for private 
networks:
• 10.0.0.0     —  10.255.255.255
• 172.16.0.0   —  172.31.255.255
• 192.168.0.0  —  192.168.255.255
You can obtain your IP address from the IANA, from an ISP or it can be assigned from a 
private network. If you belong to a small organization and your Internet access is through an 
ISP, the ISP can provide you with the Internet addresses for your local networks. On the other 
hand, if you are part of a much larger organization, you should consult your network 
administrator for the appropriate IP addresses.
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Regardless of your particular situation, do not create an arbitrary IP address; 
always follow the guidelines above. For more information on address 
assignment, please refer to RFC 1597, Address Allocation for Private Internets 
and RFC 1466, Guidelines for Management of IP Address Space.
3.2.2  Nailed-Up Connection (PPP)
A nailed-up connection is a dial-up line where the connection is always up regardless of traffic 
demand. The ZyXEL Device does two things when you specify a nailed-up connection. The 
first is that idle timeout is disabled. The second is that the ZyXEL Device will try to bring up 
the connection when turned on and whenever the connection is down. A nailed-up connection 
can be very expensive for obvious reasons.