ZyXEL Communications Centralized Network Management Vantage CNM User Manual page 61

Table 13 Device Operation > Device Configuration > LAN > LAN (continued)
LABEL
DHCP WINS
Server 1, 2
Pool Size
First DNS Server
Second DNS
Server
Third DNS Server
TCP/IP
IP Address
IP Subnet Mask
RIP Direction
RIP Version
Multicast
Windows Networking (NetBIOS over TCP/IP): NetBIOS (Network Basic Input/Output System) are TCP
or UDP broadcast packets that enable a computer to connect to and communicate with a LAN. For
some dial-up services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls. However it
may sometimes be necessary to allow NetBIOS packets to pass through to the WAN in order to find a
computer on the WAN.
Allow between LAN
and WAN1
Vantage CNM User's Guide
DESCRIPTION
Type the IP address of the WINS (Windows Internet Naming Service) server that
you want to send to the DHCP clients. The WINS server keeps a mapping table
of the computer names on your network and the IP addresses that they are
currently using.
This field specifies the size, or count of the IP address pool.
These fields are enabled if the DHCP Mode is Server. Specify the DNS servers
that are provided to DHCP clients.
Select From ISP if you want the device to use corresponding DNS server
provided by the ISP.
Select User-Defined and specify the IP address if you want the device to use the
specific DNS server.
Select DNS Relay if you want the device to
Type the IP address of the device in dotted decimal notation. 192.168.1.1 is the
factory default.
The subnet mask specifies the network number portion of an IP address. The
device automatically calculates the subnet mask based on the IP address that
you assign. Unless you are implementing subnetting, use the subnet mask
computed by the device, which is 255.255.255.0.
RIP (Routing Information Protocol, RFC1058 and RFC 1389) allows a router to
exchange routing information with other routers. The RIP Direction field controls
the sending and receiving of RIP packets. Select the RIP direction from Both/In
Only/Out Only/None. When set to Both or Out Only, the device broadcasts its
routing table periodically. When set to Both or In Only, it incorporates the RIP
information that it receives; when set to None, it does not send any RIP packets
and ignores any RIP packets received. Both is the default.
The RIP Version field controls the format and the broadcasting method of the
RIP packets that the 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. Multicasting can reduce the load on non-router machines since they
generally do not listen to the RIP multicast address and so will not receive the
RIP packets. However, if one router uses multicasting, then all routers on your
network must use multicasting, also. By default, RIP direction is set to Both and
the Version set to RIP-1.
Select IGMP V-1 or IGMP V-2 or None. 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 inter operability between IGMP
version 2 and version 1, please see sections 4 and 5 of RFC 2236.
Select this check box to forward NetBIOS packets from the LAN to WAN port
1and from WAN port 1 to the LAN. If your firewall is enabled with the default
policy set to block WAN port 1 to LAN traffic, you also need to enable the default
WAN port 1 to LAN firewall rule that forwards NetBIOS traffic.
Clear this check box to block all NetBIOS packets going from the LAN to WAN
port 1 and from WAN port 1 to the LAN.
Chapter 5 Device Network Settings
61