[j-nsp] Help on BGP

[Tommy J]

Thanks 

I think this is what I have in mind. Anyhow does any
one has a working example ? I am trying to find
something like this at Tech pubs but it looks like it
is missing. 

Regards 

Tommy
--- Pedro Roque Marques <roque at juniper.net> wrote:

> 
> > Now we are getting a demands from our customers
> who
> > wants routes only from one upstream only i.e. non
> > blended internet routing table either routes from
> ISP
> > A or ISP B. How can I achieve this? 
> > I did little research on this subject and logical
> > routers seem to be an option. 
> 
> What you want to do is to create 2 routing
> instances, and per upstream 
> provider...
> 
> e.g.
> 
> routing-instances {
>     up1 {
> 	instance-type virtual-router;
>     }
> }
> 
> Then in your BGP peering statements configure a
> rib-group such that 
> received routes are imported both to inet.0 and
> up1.inet.0...
> 
> rib-group import [inet.0 up1.inet.0];
> 
> This means that you now have 3 copies of the routing
> table...
> 1 with path selection between two upstreams... and
> two others w/ just 
> full contents per upstream...
> 
> then you can configure your customers such that:
>   - customer facing interface is in a particular
> "upstream" 
> routing-instance.
>   - customer BGP config is also in upstream
> instance...
>   - customer BGP session has a rib-group that
> imports routes into inet.0
> 
> This sort of scenarios are typically called
> "upstream selection". A fair 
> ammount of people do this for their customers.
>    Pedro.
> 


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