BinTec X4000, User Manual

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234 X4000 User’s Guide
Advanced Configuration of the Basic Unit with the Setup Tool
8
8.2.10 Proxy ARP (Address Resolution Protocol)
ARP requests The
➤➤
Proxy ARP function enables X4000 to answer
➤➤
ARP requests
from the LAN. That is, if a host in the LAN wants to set up a connection to
another host in the LAN or to a WAN partner but doesn’t know its hardware
address, it sends a so-called ARP request into the network as a
➤➤
broadcast . This is actually a question to all those in the network: "What
is the hardware address of host x?" If Proxy ARP is activated in X4000 and the
desired host can be reached over a defined WAN connection, X4000 answers
the ARP request with its own hardware address. This is sufficient for
establishing the connection: The
➤➤
data packets are sent to X4000 , which
then forwards them to the desired host.
Figure 8-2: Proxy ARP
Configuration is made in:
■
WAN P
ARTNER
➧
E
DIT
➧
IP
➧
A
DVANCED
S
ETTINGS
■
CM-100BT, F
AST
E
THERNET
➧
A
DVANCED
S
ETTINGS
ISDN
192.168.1.254
MAC = 0:0:0:1:2:3
192.168.1.4
MAC = 0:0:0:4:5:6
192.168.1.4
MAC = ?
1
X4000D
Bin Tec
4000
192.168.1.4
MAC=0:0:0:1:2:3
2
Your Local Area Network
Single workstation
with ISDN card