IP are assigned to wrong ENI

[tunkukhairi-ecvmy]

I have a node group that has multiple ENIs attached to it. Some of the ENIs are from the same subnet. From NAD, I specifically mention to use "master":"eth2" which from eni-id eni-qwertyuiop but it assigned the IPs to eth3 eni-asdfghjkl. Both eni in the same node and same subnet.

All data are anonymized to protect confidential info but here's the logs from initcontainer

---Not-working pod---

~# kubectl logs pod-a -c awsipmgmt
{"type":"log","level":"notice","time":"2025-10-15T10:39:37.411131638Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"ebc124","host":"","timezone":"UTC","log":{"msg":"Got InstanceId:  region: ap-southeast-5"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:38.499836175Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"ebc124","host":"","timezone":"UTC","log":{"msg":"Node ENIC: eni-qwertyuiop cidr: 172.1.1.0\/25 subnetID: subnet-zxcvbnm"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:39.194263485Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"ebc124","host":"","timezone":"UTC","log":{"msg":"Node ENIC: eni-asdfghjkl cidr: 172.1.1.0\/25 subnetID: subnet-zxcvbnm"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:39.613308868Z","process":"assign-ip4-ip6[19]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"ebc124","host":"","timezone":"UTC","log":{"msg":"Going to reassign iplist: ['172.1.1.1', '172.1.1.2', '172.1.1.3', '172.1.1.4'] to ENI:eni-asdfghjkl"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:40.274728633Z","process":"assign-ip4-ip6[19]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"ebc124","host":"","timezone":"UTC","log":{"msg":"Finished reassign iplist: ['172.1.1.1', '172.1.1.2', '172.1.1.3', '172.1.1.4'] to ENI:eni-asdfghjkl"}}

This is a working pod with the same deployment and same NAD attached.

---Working pod---

~# kubectl logs pod-b -c awsipmgmt
{"type":"log","level":"notice","time":"2025-10-15T10:39:37.379837429Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"dfg321","host":"","timezone":"UTC","log":{"msg":"Got InstanceId:  region: ap-southeast-5"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:38.520426450Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"dfg321","host":"","timezone":"UTC","log":{"msg":"Node ENIC: eni-asdfghjkl cidr: 172.1.1.0\/25 subnetID: subnet-zxcvbnm"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:39.221270276Z","process":"assign-ip4-ip6[7]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"dfg321","host":"","timezone":"UTC","log":{"msg":"Node ENIC: eni-qwertyuiop cidr: 172.1.1.0\/25 subnetID: subnet-zxcvbnm"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:39.776959273Z","process":"assign-ip4-ip6[19]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"dfg321","host":"","timezone":"UTC","log":{"msg":"Going to reassign iplist: ['172.1.1.1', '172.1.1.2', '172.1.1.3', '172.1.1.4'] to ENI:eni-qwertyuiop"}}
{"type":"log","level":"notice","time":"2025-10-15T10:39:40.461947014Z","process":"assign-ip4-ip6[19]","service":"aws-ip-manager","system":"unknown","neid":"unknown","container":"dfg321","host":"","timezone":"UTC","log":{"msg":"Finished reassign iplist: ['172.1.1.1', '172.1.1.2', '172.1.1.3', '172.1.1.4'] to ENI:eni-qwertyuiop"}}

[raghs-aws]

Hi, we earlier didnt support multiple ENIs from same subnet. Did you test with the latest code base release?