Biwa, it is most commonly used in L3VPN scenarios where you want to perform
IBGP between the PE and CE instead of the more common EBGP.
It would look similar to this:
someone@R1> show configuration routing-options | match autonomous
autonomous-system 65412;
So, my internal backbone ASN is 65412, but in this case the customer wants to
do IBGP with me and their ASN is 65600.
someone@R1> show configuration routing-instances VPNC
instance-type vrf;
interface ge-0/0/1.411;
vrf-target target:65412:600;
routing-options {
autonomous-system 65600 independent-domain;
}
protocols {
bgp {
group IBGP {
type internal;
neighbor 192.168.30.1;
}
}
}
someone@R1> show route table VPNC
VPNC.inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.5.0.0/16 *[BGP/170] 00:05:26, localpref 100
AS path: I
> to 192.168.30.1 via ge-0/0/1.411
10.6.0.0/16 *[BGP/170] 00:04:12, localpref 100, from 10.200.16.3
AS path: I
> to 10.200.2.2 via ge-0/0/0.110, label-switched-path R1-R9
192.168.30.0/24 *[Direct/0] 00:05:28
> via ge-0/0/1.411
192.168.30.2/32 *[Local/0] 00:05:31
Local via ge-0/0/1.411
192.168.31.0/24 *[BGP/170] 00:04:12, localpref 100, from 10.200.16.3
AS path: I
> to 10.200.2.2 via ge-0/0/0.110, label-switched-path R1-R9
Hope this helps.
-Jeff
On Jul 27, 2011, at 12:05 AM, biwa net wrote:
> Dear All
>
> I am having a hard time understanding the concept of "independent-domain " ,
>
> Although I read the doc about it , the explanation, is not very clearly
> explained and not very clear in practical terms
>
> Anyone can explain in leman terms what is the role of it , and especially
> can anyone give me some real life example where and how this would be
> applied ?
>
> Thanks
>
> Biwa
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