User manual

86
RIP Policies
: The following RIP policies are supported by the IP route:
• Send Default
-
disabled
by default, causes router to advertise itself as the
default router.
• Send Routes
-
enabled
by default. Tells RIP to advertise (broadcast) its
routes on the network every 30 seconds - is standard for a gateway router.
• Send Subnets
-
disabled
by default. If this flag is on, only routes with the
same network and with subnets on the same network are sent out the
interface.
• Accept Default
-
disabled
by default. Determines whether router accepts
default route advertisements.
• Split Horizon
-
enabled
by default. Records the interface over which it
received a particular route and does not propagate its information about
that route back over the same interface. This prevents network loops.
• Poison Reverse
-
enabled
by default. Routes that were excluded due to
the use of split horizon are instead
included
with infinite cost (16). The
system continues to broadcast the route, but with an infinite cost. In
general, it performs better when used with split horizon.
• Flash Update
-
enabled
by default. It is also known as “triggered update”,
meaning routes that have their metrics modified will be advertised
immediately, instead of waiting for the next scheduled broadcast.
The following flags are for backward compatibility with RIP version 1 when
RIP version 2 is selected as the routing protocol:
• Send Compatibility
- Controls the selection of destination MAC and IP
addresses. It is
enabled
by default. When enabled,
broadcast
address is
used; when disabled,
multicast
address is used.
• RIP V1 Receive
- Controls the receipt of RIP version 1 updates. When
RIP version 1 is the selected routing protocol, this policy is
enabled
by
default, which means RIP version 1 packets are received. (When RIP
version 2 is chosen, this policy is en
abled
by default, meaning RIP
version 1 packets are received.
• RIP V2 Receive
- Controls receipt of RIP version 2 updates. When RIP
v1 is the selected routing protocol, this policy is
enabled
by default, which
allows RIPV1 packets to be received. When RIP version 2 is selected,
this policy is
enabled
by default, allowing RIPV2 packets to be received.
• Silent
- This flag tells RIPv2 not to send updates. It is
disabled
by default.