If you are running next hop self on your BGP routes at the edge, the best path will be via a loopback in an LSP.
If you have two identical routes, one of the tie breakers is IGP preference. If that knob isn’t set the IGP cost will be 1 for everything, and you will progress down to less helpful tue breakers like router id. Regards, Dave On Sun, 2 Aug 2020 at 11:58, Chen Jiang <[email protected]> wrote: > Hi! Michael > > Thanks for your clarification. > > Sure, it will let LDP use IGP metric, but is there any benefit? > > Cause per my understanding LDP only works for label distributing, not path > selection, and LDP always follows the IGP path, so what is the difference > or benefit to add additional configuration knob to let LDP use IGP metric? > > BR! > > Chen Jiang > > On Sun, Aug 2, 2020 at 6:32 PM Michael Hallgren <[email protected]> wrote: > > > Hi James, > > > > From memory, Junos assigns metric 1 by default to "LDP routes", not IGP > > metric, unless you push this button. > > > > Cheers, > > mh > > ------------------------------ > > *De :* Chen Jiang <[email protected]> > > *Envoyé :* dimanche 2 août 2020 12:10 > > *À :* Juniper List > > *Objet :* [j-nsp] track-igp-metric in LDP > > > > Hi! Experts > > > > Sorry for disturbing, I am curious about track-igp-metric knob under LDP, > > is there any scenarios it will be useful? I think ldp is just a label > > distribution protocol, the forwarding path always follows the IGP > shortest > > path, is there any benefit for using track-igp-metric? > > > > Thanks for your help! > > > > -- > > BR! > > > > > > > > James Chen > > _______________________________________________ > > juniper-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/juniper-nsp > > > > > -- > BR! > > > > James Chen > _______________________________________________ > 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
