I have come across an interesting issue when adding non-unique IPs to
an interface. I am not sure this is the right place for this issue
but I couldn't find anything online about it. The issue is that "ip
addr del" ignores the mask and deletes the first matching IP. I know
adding non-unique IP to same ethernet doesn't really make sense, but
it is possible via "ip addr add"; so it should be possible to undo.
Here is the step-by-step:
1. ip addr add 1/32 dev eth2
2. ip addr add 1/24 dev eth2
3. ip addr show dev eth2
2: eth2: <BROADCAST,MULTICAST> mtu 68 qdisc pfifo_fast qlen 1000
...
inet 1.0.0.0/32 scope global eth2
inet 1.0.0.0/24 scope global eth2
4. ip addr del 1/24 dev eth2
5. ip addr show dev eth2
2: eth2: <BROADCAST,MULTICAST> mtu 68 qdisc pfifo_fast qlen 1000
...
inet 1.0.0.0/24 scope global eth2
If you compare the first output to the second you will notice that
1/32 was removed. However, if you look at the "ip addr del" command
1/24 was removed not 1/32.
Does anyone know if this is a bug? a known issue? expected behavior?
or something only I am seeing?
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