Deleting orphan Lambda Network Interfaces

Question

Hello team,

Working on deleting my stack but was unable to because a Lambda function that no longer exists is somehow still using the ENIs. Can you please help?

Already took a look at this and it didn't work: https://repost.aws/knowledge-center/lambda-eni-find-delete. It says

"No Lambda functions or versions found that were using the same subnet as this ENI."

Answer

Hi,  
When you update a function to remove its VPC configuration, Lambda requires up to 20 minutes to delete the attached Hyperplane ENI[1].  
So if you determined that no functions or versions were using the same subnet as this ENI, you can retry to delete your stack 20mins later.

[1]https://docs.aws.amazon.com/lambda/latest/dg/foundation-networking.html#foundation-nw-eni-delete

Deleting orphan Lambda Network Interfaces

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