[j-nsp] Help on BGP

[Hyunseog Ryu]

It depends on the condition.
If you have customer and ISP A terminated in same box,
it will work when you use advertise-inactive keyword with community 
value in use.
But if it is different box, you will loose the route info, which is not 
best-path from ISP-A...

Hyun

Tommy J wrote:
> thanks 
> 
> I think if I do that then I will be sending only
> partial routes to the customer.  I may be wrong. 
> 
> The task on hand is to get full internet routing table
> from ISP A bypass the blended forwarding table and
> give the customer the bgp routes learned from ISP A
> only. 
> 
> Tommy 
> 
> --- ADAM CALLIS <adam.callis at gmail.com> wrote:
> 
>> One way (there are many I am sure) that this can be
>> achieved is to tag the
>> routes with a Community when they arrive from your
>> external BGP Sources
>>
>> Then, on your downstream peers, you could tell it to
>> only advertise routes
>> that match that community
>>
>>
>> I can think of a few more complex ways to attempt
>> this, but it gets dirty
>> quickly.
>>
>> One other note, I am not exactly sure if it will
>> send a route from ISP B
>> that isn't your preferred route even it it is tagged
>> with the proper
>> community. The advertise-inactive may solve that,
>> but I am not sure.
>>
>>
>> Thanks,
>> Adam Callis
>> JNCIE-M #159
>>
>>
>> On 7/7/06, Tommy J <sunman_1970 at yahoo.com> wrote:
>>> Hello
>>>
>>> I am new to Junipers and I need help over a setup
>> that
>>> I haven't done before. Any help will be more than
>>> appericated.
>>>
>>> We are a small ISP running BGP4 on our M10i. We
>> have
>>> two upstreams A and B who are providing us with a
>> full
>>> internet routing table. And in turn we are acting
>> as
>>> Transit to our customers and providing them a
>> blended
>>> internet routing table with routes from both
>> upstreams
>>> (The best path).
>>> 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.
>>>
>>> Any help on this will appreciated.
>>>
>>> Thanks
>>>
>>> Tommy
>>>
>>>
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> 
> 
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