ZyXEL MAX-200M1 Series User’s Guide
Chapter 8 LAN
85
If the
Primary
and
Secondary DNS Server
fields in the
LAN Setup
screen are not
specified,
for instance, left as 0.0.0.0, the ZyXEL Device tells the DHCP clients that it itself is the DNS
server. When a computer sends a DNS query to the ZyXEL Device, the ZyXEL Device
forwards the query to the real DNS server learned through IPCP and relays the response back
to the computer.
Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It
does not mean you can leave the DNS servers out of the DHCP setup under all circumstances.
If your ISP gives you explicit DNS servers, make sure that you enter their IP addresses in the
LAN Setup
screen. This way, the ZyXEL Device can pass the DNS servers to the computers
and the computers can query the DNS server directly without the ZyXEL Device’s
intervention.
8.1.5 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 ZyXEL Device will broadcast its routing table periodically and incorporate the
RIP information that it receives.
•
In Only -
the ZyXEL Device will not send any RIP packets but will accept all RIP
packets received.
•
Out Only -
the ZyXEL Device will send out RIP packets but will not accept any RIP
packets received.
•
None -
the ZyXEL Device 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
ZyXEL Device 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.
8.1.6 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
Содержание MAX-200M1 Series
Страница 1: ...MAX 200M1 Series IEEE 802 16e Simple Indoor CPE User s Guide Version 3 60 04 2007 Edition 1...
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Страница 26: ...ZyXEL MAX 200M1 Series User s Guide 26 List of Tables...
Страница 40: ...ZyXEL MAX 200M1 Series User s Guide 40 Chapter 2 Introducing the Web Configurator...
Страница 48: ...ZyXEL MAX 200M1 Series User s Guide 48 Chapter 3 Tutorial...
Страница 54: ...ZyXEL MAX 200M1 Series User s Guide 54 Chapter 4 Internet Setup Wizard...
Страница 58: ...ZyXEL MAX 200M1 Series User s Guide 58 Chapter 5 VoIP Wizard...
Страница 82: ...ZyXEL MAX 200M1 Series User s Guide 82 Chapter 7 WAN Setup...
Страница 96: ...ZyXEL MAX 200M1 Series User s Guide 96 Chapter 8 LAN...
Страница 116: ...ZyXEL MAX 200M1 Series User s Guide 116 Chapter 10 SIP Figure 66 VoIP SIP SIP Settings Advanced...
Страница 130: ...ZyXEL MAX 200M1 Series User s Guide 130 Chapter 11 Phone...
Страница 144: ...ZyXEL MAX 200M1 Series User s Guide 144 Chapter 13 Phone Book...
Страница 148: ...ZyXEL MAX 200M1 Series User s Guide 148 Chapter 14 Content Filter...
Страница 152: ...ZyXEL MAX 200M1 Series User s Guide 152 Chapter 15 Static Route...
Страница 162: ...ZyXEL MAX 200M1 Series User s Guide 162 Chapter 16 Remote MGMT...
Страница 176: ...ZyXEL MAX 200M1 Series User s Guide 176 Chapter 17 UPnP...
Страница 218: ...ZyXEL MAX 200M1 Series User s Guide 218 Appendix A...
Страница 245: ...ZyXEL MAX 200M1 Series User s Guide Appendix D 245...
Страница 246: ...ZyXEL MAX 200M1 Series User s Guide 246 Appendix D...
Страница 248: ...ZyXEL MAX 200M1 Series User s Guide 248 Appendix E...
Страница 252: ...ZyXEL MAX 200M1 Series User s Guide 252 Appendix F...