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I created several virtual interfaces like this:

ip link add link eth0 name eth01 type macvlan
ip link add link eth0 name eth02 type macvlan
ip link add link eth0 name eth03 type macvlan

and assigned different IP addresses to them:

ifconfig eth01 192.168.0.101
ifconfig eth02 192.168.0.102
ifconfig eth03 192.168.0.103

The problem is that when I ping either one from another machine and look at the reply packets in Wireshark, they all come with the same source MAC address corresponding to one of the interfaces (the one that was created first).

Is there any way to get each of them reply with their corresponding MAC address?

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1 Answer 1

Interfaces don't respond to pings, machines do under the weak end system model for IPv4 that Linux uses, and this is deeply integrated into its entire networking stack. IP addresses are assigned to machines, not interfaces.

There's probably a way to do whatever it is you actually want to do and solve your actual problem. What are you trying to accomplish with multiple virtual interfaces numbered inside the same IP subnet?

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