Github user murali-reddy commented on the issue: https://github.com/apache/cloudstack/pull/1681 @serg38 Though same code path, i ran into different issue. When i was adding new tier to VPC, eth3 was plugged into VR from vCenter. As commented in the function there is delay for ethernet device to appear in the guest instance. I could see code loops through eth0, eth1, eth2 only, because it read the '/proc/sys/net/ipv4/conf' too early.
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