
Customizing RIP Services
117356-E Rev 00
5-9
Specifying the Update Mode
RIP can issue routing updates in the following modes:
• Poisoned reverse (the default)
•Split horizon
• Actual cost
Poisoned reverse mode and split horizon mode are schemes for controlling the
way a router advertises a route to the neighbor from which it learned the route.
In poisoned reverse updating, a router that sends updates to a neighbor includes
routes learned from that neighbor but sets the route metric to infinity.
In split horizon updating, a router that sends updates to a neighbor omits routes
that it learned from that neighbor.
On certain interfaces -- for example, on a frame relay interface that has virtual
connections (VCs) to different routers that are part of the same logical IP subnet --
you may need to advertise all learned routes with the actual cost.
By default, RIP sends poisoned reverse updates. You can use the BCC or Site
Manager to specify a different update mode.
5. Set the
RIP Supply
parameter. Click on
Help
or see the parameter description on
page A-62
.
6. Click on
Apply
, and then click on
Done
. You return to the Configuration Manager
window.
Site Manager Procedure
(continued)
You do this System responds
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