Hello @OtakarKlier , thank you very much for your time, your collaboration and your answers.
Some doubts, regarding point or doubt number 2, if it is being given a weight, for example, prefer traffic with a greater weight, example weight tunnel.20, "200" (Best link Bandwidth and stability), tunnel.21 "50" (lower bandwidth and less stability), in that case you will always be giving more weight to one connection than the other, based on the balancing algorithms, but if you have so many problems with balancing and load balancing and routing, in that case it does not contribute much or not at all useful to use EMCP for this type of scenario (VPN IPSEC DUAL load balancing)? In that case it would be better to just use type Fail Over with PBF or with static route path monitoring??
I also understand that the other important considerations are that the other peer, the other end, with its two tunnels (regardless of the Firewall manufacturer) should also have something like ECMP or similar, since if at the routing level, the other peer, always has preference for only one of its tunnels, some asymmetric traffic could occur, or ruotung problems. Since the other end does not understand that it can reach the networks behind Palo Alto, only from one of its interfaces or only from one of the tunnels, El PAlo Alto, it will send by ECMP, through one tunnel and another, and the other end, but it does not have something like ECMP, it will forward or use the return route or the return traffic, it will always be through one of its tunnels, this referring to the peer, to the other end.
Then you have to consider that in both firewalls, both in Palo Alto, and at the other end (the vendor whatever it may be), since Palo Alto could be sending traffic through a tunnel or tunnel interface of one of the IPSEC tunnels , and the other responds the same traffic and/or return route, it goes through the other tunnel, where the other firewall of the peer, from the other end, points out its preference metric to reach the networks that are behind the high pole and that knows through the ipsec tunnel, I understand that in that case we could have that type of problem, right, of symmetrical traffic? Are my considerations correct? Should asymmetric traffic be allowed in Palo Alto and at the other end?
Thank you very much for your time, for your collaboration.
I remain attentive to your comments
Best regards
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