Thanks Jeff and David Makes so much more sense now ,
I wish Juniper docs would be as explicit in their docs Thanks On 27 July 2011 16:53, David Ball <[email protected]> wrote: > Here's how I would nutshell it. You have a customer VRF whose AS is > 1. They advertise routes to you via iBGP. Your core network (the > primary routing instance) uses AS3. > > Without independent-domain configured, if the customer advertises > 10.0.0.0/24 to you via iBGP, it'll have their AS1 in the AS path, but > to transport the advertisement across your core to the other PEs where > they connect, your core AS3 is added to the AS path by MP-BGP (AS path > is now 3 1). When it comes 'out' of the core back into the L3VPN at > a remote PE, the L3VPN AS1 is added again, making the AS Path 1 3 1, > which is an AS Loop. Similar happens if they're doing eBGP with you. > > The independent-domain knob ensures that only the ASes in the > routing-instance are checked during loop detection, and the > main/primary routing instances (your core's AS3) is not considered. > By default this is done, per the docs, by using transitive attribute > 128 which hides the route's as path, LP, etc in the AttrSet so those > attributes are hidden away during the loop checking. In newer code > (10.3+ ?) you can use the 'no-attr-set' knob following the > 'independent-domain' knob which doesn't use AttrSet and simply does > loop checking on routing-instances ASes without considering your > core's AS used in MP-BGP. > > HTH, > > David > > > > On 27 July 2011 01:05, biwa net <[email protected]> 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 > > _______________________________________________ > > juniper-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/juniper-nsp > > > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
