You can't answer the question with the information you gave. You just
say that there are three upstream providers with OSPF and BGP. You
don't say which routes come over which and what their weights are.
Just check your routing table. Whatever path has the best routes to one
of the networks you specified will become the gateway of last resort.
As for their precidence, I don't know. As with most things cisco, it
could either be the order that they are in the config script, top down,
or the order of their sorted queue. So it may go through all of the
best 10 routes before the best 192 routes. That's something to put into
lab.
Usually, you only have one default network. The only case I can think
of that you might have more is if you want everything to flow to data
center A if there isn't a route unless data center A gets hit by a large
falling rock, then transfer all the default traffic to data center B.
To have more than one increases complexity, and with complexity comes
failure.
Mike
Vijendra Jaiswal wrote:
> My query is still unanswered !!!!!!
>
> As Michael worte " the best route wins and gets set as the gateway of last
> resort"
> Of the example i wrote abt how does one which route will be the gateway of
> last resort .
> Vijendra.
>
>
> "Michael R. Eckhoff" wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
>>All routes that match the default network will get tagged as default
>>candidates. As with most routing decisions, the best route wins and
>>gets set as the gateway of last resort. If that entry goes away, the
>>second one takes it place, and so forth, until you are out of default
>>candidates.
>>
>>-me
>>
>>Vijendra Jaiswal wrote:
>>
>>>Can anyone pls tell me on what basis the entry of one of the
>>>default-network given in the configuration , is made in the routing
>>>
> table .
>
>>>For e.g :---- The router is having 03 upstream providers with OSPF and
>>>
> BGP
>
>>>running
>>>Provider 1) Default network: 10.0.0.0
>>> Deault network :192.181.35.0
>>> Default network: 192.140.0.0
>>>
>>>Provider 2) Default network 204.45.56.0
>>>Provider 2) Default network 209.10.70.0
>>>
>>>All the above entries are made in the routing table using the ip
>>>default-network command. Hence the router is having 05 default network
>>>
> in
>
>>>the routing table.
>>>
>>>Pls help me in letting me know of the above 05 default network given ,
>>>
>>which
>>
>>>one of them will be listed in the routing table as "gateway of last
>>>
> resort"
>
>>>when one sees using the command "show ip route" . And pls tell me on
>>>
> what
>
>>>basis the particular network will be choosen as "gateway of last
>>>
> resort"
>
>>>Hoping that you will help me in solving this mystry for
>>>
> me........Thanks.
>
>>>Vijendra
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