这种情况通常是由于安全组配置造成的。您需要检查两个ENI在同一安全组中是否有相同的规则。如果规则不同，则可能会导致一条ENI接受，另一条ENI被拒绝。此外，您应该检查网络访问控制列表（Network ACLs）和子网级别的防火墙设置。

以下是一个Python脚本示例，可以用于检查两个ENI是否在同一个安全组中并且具有相同的安全组规则：

import boto3

client = boto3.client('ec2', region_name="us-west-2")

eni_reservations = client.describe_instances()['Reservations']

eni_list = []

for r in eni_reservations:
    for i in r['Instances']:
        for n in i['NetworkInterfaces']:
            eni_list.append(n['NetworkInterfaceId'])

if len(eni_list) != 2:
    print("Error: There must be exactly two ENIs")
    exit(1)

eni1 = eni_list[0]
eni2 = eni_list[1]

eni1_sg_list = client.describe_network_interfaces(NetworkInterfaceIds=[eni1])['NetworkInterfaces'][0]['Groups']
eni2_sg_list = client.describe_network_interfaces(NetworkInterfaceIds=[eni2])['NetworkInterfaces'][0]['Groups']

if set(eni1_sg_list) != set(eni2_sg_list):
    print("ENIs are not in the same security group")
    exit(1)

for sg in eni1_sg_list:
    eni1_sg_rules = client.describe_security_groups(GroupIds=[sg['GroupId']])['SecurityGroups'][0]['IpPermissions']
    eni2_sg_rules = client.describe_security_groups(GroupIds=[sg['GroupId']])['SecurityGroups'][0]['IpPermissions']
    
    if set(eni1_sg_rules) != set(eni2_sg_rules):
        print("ENIs have different security group rules")
        exit(1)

print("ENIs are in the same security group and have