ZyXEL p-660hwp Guia Do Utilizador

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Chapter 6 LAN Setup
P-660HWP-Dx User’s Guide
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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.
"
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.
6.2.2  RIP Setup
RIP (Routing Information Protocol) allows a router to exchange routing information with 
other routers. The RIP Direction field controls the sending and receiving of RIP packets. 
When set to:
• Both - the P-660HWP-Dx will broadcast its routing table periodically and incorporate the 
RIP information that it receives.
• In Only - the P-660HWP-Dx will not send any RIP packets but will accept all RIP 
packets received.
• Out Only - the P-660HWP-Dx will send out RIP packets but will not accept any RIP 
packets received.
• None - the P-660HWP-Dx will not send any RIP packets and will ignore any RIP packets 
received.
The Version field controls the format and the broadcasting method of the RIP packets that the 
P-660HWP-Dx sends (it recognizes both formats when receiving). RIP-1 is universally 
supported; but RIP-2 carries more information. RIP-1 is probably adequate for most networks, 
unless you have an unusual network topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that 
RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.
6.2.3  Multicast
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 
recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to 
a group of hosts on the network - not everybody and not just 1. 
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish 
membership in a Multicast group - it is not used to carry user data. IGMP version 2 (RFC 
2236) is an improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If 
you would like to read more detailed information about interoperability between IGMP 
version 2 and version 1, please see sections 4 and 5 of RFC 2236. The class D IP address is 
used to identify host groups and can be in the range 224.0.0.0 to 239.255.255.255. The address