User's Manual

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will prohibit the default function of authenticating the source IP address in incoming route updates.
Command Purpose
no validate-update-source
Prohibit to authenticate the Source IP Address of
the incoming RIP Router Updating.
58.3.11 Maximum Number of Routes
By default, the local RIP routing table can contain up to 1024 routes. When the number of routes in the routing
table exceeds the maximum number, the route will not be added to the routing table any more. Meanwhile, the
user will be notified that the number of routes in the routing table has reached the maximum number. Run the
commands in the following table to configure the maximum number of the routes in the local RIP routing table
in router configuration mode.
Command Purpose
maximum-count
number
Configures the maximum number of routes for the
local RIP routing table.
no maximum-count
Resumes the default maximum number of the
routes in the local RIP routing table.
58.3.12 Activating or Prohibit the Horizontal Split
Normally, the router, which is connected with IP Network and using the Distance Vector Routing Protocol, takes
split-horizon to lower the possibility of route loops. The Split-Horizon prevents the announcements of route
information to the receiving interface of this route information. In this way, communication within several routers
(especially when the loop breaks) will be optimized. However, to Non-broadcasting Network (such as FR),
things are not so easy. And maybe you have to prohibit the Horizontal Split.
If an interface has been configured with a supplementary IP Address and he Horizontal Split has been activated,
the update-Source IP Address of the route update may not include every secondary IP address. The source
IP address of one route update includes only one Network Number (unless the split-horizon is Prohibited).
In order to activate or prohibit the Horizontal Split, the following commands should be taken under interface
configuration mode:
Command Purpose
ip rip split-horizon
Activate the Split- Horizon
no ip rip split-horizon
Prohibit the Split- Horizon
Under the default circumstance, for the point to Point Interface, the Split-Horizon is activated; For Point-to
multiple point Interface, the Split-Horizon is prohibited.
Please refer to the specific example of using Split-Horizon in the "Examples of Split-Horizon" in Section of this
Chapter.
Notes:
Commonly, it is suggested that the default state remain unchanged unless you are sure that your application
can't declare the route correctly until you change its state. Always remember: if the Split-Horizon is prohibited