C
HAPTER
45
| IP Routing Commands
Routing Information Protocol (RIP)
– 1039 –
COMMAND MODE
Interface Configuration (VLAN)
DEFAULT SETTING
split-horizon poisoned
COMMAND USAGE
◆ Split horizon never propagates routes back to an interface from which
they have been acquired.
◆ Poison reverse propagates routes back to an interface port from which
they have been acquired, but sets the distance-vector metrics to
infinity. (This provides faster convergence.)
◆ If split-horizon is disabled with the no rip ip split-horizon command,
and a loop occurs, the hop count for a route may be gradually
incremented to infinity (that is, 16) before the route is deemed
unreachable.
EXAMPLE
This example propagates routes back to the source using poison-reverse.
Console(config)#interface vlan 1
Console(config-if)#ip split-horizon poison-reverse
Console(config-if)#
clear ip rip route This command clears specified data from the RIP routing table.
SYNTAX
clear ip rip route {ip-address netmask | all | connected | ospf | rip
| static}
ip-address - IP address of a route entry.
netmask - Network mask for the route. This mask identifies the
network address bits used for the associated routing entries.
all - Deletes all entries from the routing table.
connected - Deletes all currently connected entries.
ospf - Deletes all entries learned through the Open Shortest Path
First routing protocol.
rip - Deletes all entries learned through the Routing Information
Protocol.
static - Deletes all static entries.
DEFAULT SETTING
None
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