BinTec X3200, User Manual

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218 BinTec Communications AG
Advanced Configuration
6
6.2.11 Proxy ARP (Address Resolution Protocol)
ARP requests The
➤➤
Proxy ARP function enables X3200 to answer
➤➤
ARP requests
from the local LAN and from the LAN of specific WAN partners. 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 does not know its hardware address, it sends a so-called ARP re-
quest into the network as a
➤➤
broadcast . If Proxy ARP is activated in X3200
and the desired host can be reached over a WAN interface which is defined as
a host route, X3200 answers the ARP request with its own hardware address.
This is sufficient for establishing the connection: The
➤➤
data packets are
sent to X3200 , which then forwards them to the desired host.
Figure 6-2: Proxy ARP
Configuration is made in:
■
WAN P
ARTNER
➧
E
DIT
➧
IP
➧
A
DVANCED
S
ETTINGS
■
CM-BNC/TP, 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=0:0:0:1:2:3
2
192.168.1.4
MAC = ?
1
Your Local Area Network
Single workstation
with ISDN card