[j-nsp] Hidden IPv4 iBGP routes

[David Miller]

On 3/13/2012 4:15 PM, Stefan Fouant wrote:
> Yes this is correct and is indeed the default Junos behavior. If you wanted to receive a looped BGP update, you can define the amount of loops allowed (.i.e. number of times your own AS appears in the AS Path attribute) by configuring the 'set routing-options autonomous system <as-num> loops <num>' command.
>
> HTHs.
>
> Stefan Fouant
> JNCIE-SEC, JNCIE-SP, JNCIE-ER, JNCI
> Technical Trainer, Juniper Networks
>
> Follow us on Twitter @JuniperEducate
>
> Sent from my iPad

You can also allow loops on a per BGP neighbor basis with:

neighbor 10.0.0.1 {
    family inet {
        unicast {
            loops 1;
        }
    }
}

-DMM

> On Mar 13, 2012, at 4:10 PM, "Mohammad" <masalbad at gmail.com> wrote:
>
>> Hi john;
>>
>>
>>
>> As far as I know when an  eBGP router receives a route contains its own AS
>> in the AS path it consider it as a loop, so for your case the juniper router
>> is seeing its own AS (XXXX) in the route's ASPATH received from its eBGP
>> neighbor (XXXXX  YYYYY I), so the solution I would suggest is to remove AS
>> XXXX on the other router before sending it to the juniper router, if XXXX is
>> a private AS you can use remove private on the other router; or you can use
>> AS override.
>>
>> Hope it is helpful;
>> Mohammad Salbad
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