topic Re: ECMP Preferred Route in General Topics

ECMP Preferred Route

LukeBullimore — Tue, 03 Oct 2017 11:07:24 GMT

Hi All,

Does anyone have the answer as to how the Palo Alto choses the "preferred route" when ECMP is configured?

As per the runtime stats, the referred route for all these routes is 172.16.8.226. (* flag) Both routes in each of the three destinations have been forwarded to the FIB as per the "e" flag.

Re: ECMP Preferred Route

Laurent_Dormond — Tue, 03 Oct 2017 12:57:03 GMT

Hello,

I think that it depends of the load-balancing algorithm that you choose for ECMP routing.

If you use IP-Modulo (default option) you will always have same route as preferred route for a given source / destination couple.

Regards,

Laurent

Re: ECMP Preferred Route

pnagulan — Wed, 30 Nov 2022 20:18:20 GMT

May I know, why there is a preferred path icon ("*") next to one path when ECMP is enabled? I thought when ECMP is enabled, it can go any one of the paths?