Compatible Systems 5.4 - Manual (Page 54)

48 Chapter 2 - IP Routing & Bridging
• If BGP is specified, the static route entry will be redistributed into the
BGP routing protocol.
Ethernet IP Options
Bridge IP Options
Ethernet or Bridge TCP/IP Options Dialog Box
To access this dialog box, select Ethernet/ or Bridge/TCP/IP Routing from the
Device View, then click on the Options button.
This dialog box provides access to settings for IP Proxy ARP settings and the
UDP Forwarding Agents Dialog Box.
IP Proxy ARP
Proxy ARP (Address Resolution Protocol) is used to allow the network
portion of a group of IP addresses to be shared between several physical
network segments. An example would be sharing one Class C address range
between two physical Ethernets.
The ARP protocol itself provides a way for devices on an IP network to create
a mapping between physical (i.e. Ethernet) addresses and logical IP
addresses.
Proxy ARP makes use of this mapping feature by instructing a device to
answer ARP requests as a “proxy” for the IP addresses behind one of its inter-
faces. The device which sent the ARP request will then correctly assume that
it can reach the requested IP address by sending packets to the physical
address that was returned to it.
This technique effectively hides the fact that a network has been (further)
subnetted.