Customer Service Public - VMware: After reboot Interface re-ordering in FlexVNF VM running on VMWare

Question:

How to fix Interface re-ordering after reboot in FlexVNF VM running on VMware ?

Answer:

The issue here is related to VMware behavior.

If an interface is added or deleted, Linux/ESXi does not guarantee the consistent interface numbering.
This is applicable for all types of interfaces (VMXNET3/ET1000/SR-IOV)
https://kb.vmware.com/s/article/1034782

Open file /etc/udev/rules.d/75-persistent-net-generator.rules and comment out line #78 and #79

Add # in start of line 78 and 79. sudo nano /etc/udev/rules.d/75-persistent-net-generator.rules.

		78 ENV{MATCHADDR}=="00:0c:29:*|00:50:56:*|00:05:69:*|00:1C:14:*", 
		\ 79 ENV{MATCHADDR}=""

Open /etc/udev/rules.d/70-persistent-net.rules and define the correct order of NIC based on MAC. If 70-persistent-net.rules" file doesn't exist you may have to reboot the FlexVNF VM first.

NOTE: You have to explicitly add udev rules for SR-IOV interfaces. Udev rules gets created for VMXNET3, E1000 interfaces after commenting line 78 and 79 from /etc/udev/rules.d/75-persistent-net-generator.rules

Example:

[admin@BLR-Hub-01: ~] $ sudo cat /etc/udev/rules.d/70-persistent-net.rules
		# This file was automatically generated by the /lib/udev/write_net_rules
		# program, run by the persistent-net-generator.rules rules file.
		#
		# You can modify it, as long as you keep each rule on a single
		# line, and change only the value of the NAME= key.

		# PCI device 0x8086:0x100f (e1000)
		SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:09:ed:b7", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
		SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:09:ed:c1", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

		# PCI device 0x15ad:0x07b0 (vmxnet3)
		SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:09:ed:ad", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

Reboot VM