BinTec X3200, Руководство пользователя

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232 BinTec Communications AG
Advanced Configuration
6
When you enter a static entry, you define how long this assignment of name and
IP address is valid by setting the TTL. This TTL is entered in each DNS record
with which X3200 answers a relevant DNS request.
Monitor function Which IP addresses are requested by hosts in the LAN and how often?
The Setup Tool permits rapid access to this and other statistical information.
You can also use the
nslookup
command in the command line (SNMP shell)
to check how a name or an IP address is resolved by X3200 or another name
server (see chapter 11.1, page 350 ). To obtain help information for the com-
mand, enter
nslookup -?
.
Other Options
Global Name Server In
IP
➧
S
TATIC
S
ETTINGS
, you can also enter the IP address of preferred global
name servers that are to be asked first if X3200 cannot answer requests itself
or with forwarding entries.
For local applications, the IP address of X3200 or the loopback address
(127.0.0.1) can be entered as global name server.
If necessary, X3200 can send or receive the addresses of name servers to and
from WAN partners:
Default Interface In Default Interface, you can also select a WAN partner to whom a connection
is set up as standard for name server negotiation if name resolution was not
successful using the methods already stated.
Exchanging DNS Addresses with LAN Partners
DHCP If X3200 is configured as DHCP server, DHCP clients in the LAN can be sent
IP addresses from name servers. In this case, the addresses of the global name
servers entered in X3200 can be sent or the address of X3200 itself. In the latter
case, DNS requests from the DHCP clients are sent to X3200 , which either an-
swers these itself or passes them on if necessary (proxy function).
Make sure your static entries are always up to date. Names or IP addresses
can change at any time!