topic Re: Equal Cost Multiple Path (ECMP) - Limit 4 (PA-5220) in General Topics

Equal Cost Multiple Path (ECMP) - Limit 4 (PA-5220)

VicAcebedo — Thu, 25 Jun 2020 12:24:19 GMT

Hi All,

I need your inputs here. I have a client using ECMP (4 Links.) and they recently procured another ISP making it 5. Based on the documentation of Palo Alto Networks, the max ECMP is 4. Is there any other work around to make ECMP 5 or utilize the 5th ISP?

Re: Equal Cost Multiple Path (ECMP) - Limit 4 (PA-5220)

BPry — Thu, 25 Jun 2020 21:58:08 GMT

There's really not a way to get around the 4 link ECMP limit. You can separate the 5th link to a dedicated purpose or into a separate VR, but not into the same ECMP group.

Re: Equal Cost Multiple Path (ECMP) - Limit 4 (PA-5220)

VicAcebedo — Fri, 26 Jun 2020 01:44:26 GMT

Is there any reason why Palo Alto limit the 4 path for ECMP? Configuring Another VR would mean that traffic should be routed to the new VR for specific applications. I am also considering to our client to configure a PBF to the new ISP just to override the default routing table for specific apps.