*** This bug is a duplicate of bug 876829 ***
https://bugs.launchpad.net/bugs/876829
Björne asked net-tools upstream about this bug, I asked him to open an
Ubuntu bug. Here is my analysis about this problem, which seems to be a
regression if ifupdown:
----
I have looked at your [Blörne's] provided files. The problem we are seeing here
is the fact, that ifconfig is not able to list multiple ip addresses added to a
single network interface. This is a known problem and will likely not be fixed
in ifconfig, since the new tool "ip addr" is supposed to replace it.
However, with named alias interfaces (eth0:0) it is supposed to work. The ifup
configuration you have does however not create a named interface but adds two
addesses to the primary interface:
>From your output files:
Wrong:
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP
qlen 1000
inet 192.168.0.13/24 brd 192.168.0.255 scope global eth0
inet 172.16.1.13/24 brd 172.16.1.255 scope global eth0
Correct (after using ifconfig):
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP
qlen 1000
inet 192.168.0.13/24 brd 192.168.0.255 scope global eth0
inet 172.16.1.13/24 brd 172.16.1.255 scope global eth0:0
ifupdown is using "ip addr" command. However even with the "ip addr" command it
is possible to set up a "working" alias interface:
"ip addr add 172.16.1.13 dev eth0:0" creates a wrong configuration (adds second
ip address but does not set the correct label)
"ip addr add 172.16.1.13 dev eth0 label eth0:0" (adds correct label to second
ip address)
I have tried it on a ubuntu machine, the follwing commands will be used:
# root@ip-10-98-135-84:/etc/network# ifup -n -a -v
# Configuring interface eth0:0=eth0:0 (inet)
# run-parts --verbose /etc/network/if-pre-up.d
# ip addr add 172.16.1.13/255.255.255.0 broadcast 172.16.1.255 dev eth0:0
# ip link set dev eth0:0 up
# run-parts --verbose /etc/network/if-up.d
So it looks like this is a problem in the ifupdown package of ubuntu.
I know there was a network-script used to call "ip" in debian and it had
support for $ALIAS. It looks like the latest version on ubuntu does not use
that script anymore.
I will copy this text to your ubuntu launchpad report, since it is to be fixed
in the ifupdown package of ubuntu.
Gruss
Bernd
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https://bugs.launchpad.net/bugs/913858
Title:
ifconfig don't show all nics when using alias like eth0:0
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