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broadcasting a default route

I am confused when documentation talks about a routing protocol "broadcasting a default route". What is meant by this? Say a device is broadcasting a default route via RIP? What will devices that are listening for RIP do with this default route? Will they replace their own default route with the one that they hear over RIP? Will both default routes be available?

Thanks,

Diego

  • Other Network Infrastructure Subjects
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Cisco Employee

Re: broadcasting a default route

The router's receiving the default route via RIP update will not install that default route in the routing table as the locally configured default route has admin distance as 1 while route distributed have 120. So default route with admin distance 1 will be installed in the routing.

So RIP default route will be used as a backup default route.

Now generally, default route needs to be re-destributed only when no default route is configured on a routers receiving that.

1 REPLY
Cisco Employee

Re: broadcasting a default route

The router's receiving the default route via RIP update will not install that default route in the routing table as the locally configured default route has admin distance as 1 while route distributed have 120. So default route with admin distance 1 will be installed in the routing.

So RIP default route will be used as a backup default route.

Now generally, default route needs to be re-destributed only when no default route is configured on a routers receiving that.

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