GCE cloud nat "Dropped received packets"

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We are using GKE autopilot + cloud nat to allow our GKE to connect to the remote database. Now the thing is we have an error with dropped received packages.

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We tried to add second ip to the cloud nat in order to make GKE work via 2 ips. But as it expected - GKE works only with one. We suspect that the problem is insufficient bandwidth per 1 ip. It seems our Cloud Nat cant get a lot of data from database and it is needed wide bandwidth.

Do we understand this problem correctly? How to resolve this issue? Thanks!

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