Compatible Systems 5.4 - Manual (Page 42)

36 Chapter 2 - IP Routing & Bridging
• If No Split Horizon is selected with this pull-down menu, the device will
include all routes in an output packet, regardless of which interface they
were acquired over, and will use a normal metric.
• If Poison Reverse is selected with this pull-down menu, the device will
include all routes in an output packet, but will set the metric to infinity
for those routes which were acquired over this interface.
Output RIP - Input RIP
These flags control the behavior of RIP 1 and RIP 2 for this interface,
allowing the router to selectively send RIP, receive RIP, or both. The default
(assuming RIP 1 or RIP 2 is turned on in the Routing Protocol popup) is to
both send and receive.
Directed Broadcast
This checkbox sets whether the interface will forward
network-prefix-directed broadcasts. This is a security feature which can help
prevent your network from being used as an intermediary in certain kinds of
attacks which use ICMP echo traffic (pings) or UDP echo packets with fake
(i.e., “spoofed”) source addresses to inundate a victim with erroneous traffic.
OSPF
This option button brings up the OSPF Dialog Box which allows the OSPF
routing protocol to be enabled. For more information on this dialog box and
other OSPF parameters, refer to Chapter 15 - OSPF.