Pirelli P.RG F4202N User Manual page 118

P.RG F4202N
Metric: A measurement of the preference of a route. Typically, the lowest metric
is the most preferred route. If multiple routes have the same metric value, the
default route will be the first in order of appearance.
Routing Protocols
Routing Information Protocol (RIP): Select this check-box in order to enable
connections previously defined to use RIP. If this check-box is not selected, RIP
will be disabled for all connections, including those defined to use RIP.
- Reverse: Discus will advertise acquired route information with a high metric, in
order for other routers to disregard it.
- Do not Advertise Direct Connected Routes: the Router will not advertise the
route information to the same subnet device from which it was obtained.
Internet Group Management Protocol (IGMP): the Router provides support for
IGMP multicasting, which allows hosts connected to a network to be updated
whenever an important change occurs in the network. A multicast is simply a
message that is sent simultaneously to a pre-defined group of recipients. When
you join a multicast group you will receive all messages addressed to the group,
much like what happens when an e-mail message is sent to a mailing list. IGMP
multicasting may be useful when connected to the Internet through a router.
When an application running on a LAN computer sends out a request to join a
multicast group, the Router will listen and intercept this group's messages,
sending them to the subscribed application.
Domain Routing: When Router's DNS server receives a reply from an external
DNS server, it will add a routing entry for the IP address of the reply through the
device from which it arrived. This means that future packets from this IP ad-
dress will be routed through the device from which the reply arrived.
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112 HBK 939800036-A1 Advanced Section