Avaya Configuring IP Services Manual de usuario descargar pdf (Pagina 163)

100

101

Customizing RIP Services

303528-A Rev 00

6-11

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.

Using the BCC

Navigate to a RIP interface-specific prompt and enter:

mode

mode is one of the following:

poisoned

actual

split

For example, the following command causes RIP to send split-horizon updates on

IP interface 2.2.2.2:

rip/2.2.2.2# mode split

rip/2.2.2.2#

1 2 ... 158 159 160 161 162 163 164 165 166 167 168 ... 649 650

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Avaya Configuring IP Services Manual de usuario Pagina 163

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