Public bug reported:
1)
Description: Ubuntu 20.04.4 LTS
Release: 20.04
2)
systemd:
Installed: 245.4-4ubuntu3.15
3) What you expected to happen
Interfaces in the bond keep their real "hardware" mac addresses. bond0 takes
MAC from first interface of the bond when not explicitly set.
4) What happened instead
I wanted to change from ifupdown back to netplan/systemd-networkd. Thus I
installed netplan.io, delete /etc/network/interfaces, purged ifupdown and wrote
an yaml for netplan.
My Yaml looks as following
network:
version: 2
renderer: networkd
ethernets:
em1:
dhcp4: false
dhcp6: false
optional: true
em3:
dhcp4: false
dhcp6: false
optional: true
bonds:
bond-new:
interfaces: [em1, em3]
dhcp4: true
dhcp6: false
accept-ra: true
link-local: [ ipv6 ]
parameters:
mode: 802.3ad
mii-monitor-interval: 1
Netplan applies it without errors. Also, this represents the (working)
configuration I had with ifupdown.
Now when I apply this config, bond0 gets the following (random?) MAC address:
c2:ba:f9:db:xx:xx (xx for privacy)
Also, both interfaces em1 and em3 belonging to that bond get the same MAC
address. This actual "hardware" MAC address is obviously another. Strangely,
all interfaces get the same MAC address:
# ip a | grep c2:ba:f9:db:ed:4b -B 1
2: em1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master
bond-new state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master
bond-new state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
--
8: bond-new: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
Additionally every device added to this bond will get the same MAC
address, e. g. em2:
3: em2: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master
bond-new state DOWN group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
I already set MACAddressPolicy=none in
/lib/systemd/network/99-default.link, but it does no change this
behavior.
Removing an interface from the bond, does not revert the MAC. When I
purge netplan.io and install ifupdown, the real MAC address is set to
interfaces again.
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1981983
Title:
systemd-network changes MAC of interfaces belonging to a bond
Status in systemd package in Ubuntu:
New
Bug description:
1)
Description: Ubuntu 20.04.4 LTS
Release: 20.04
2)
systemd:
Installed: 245.4-4ubuntu3.15
3) What you expected to happen
Interfaces in the bond keep their real "hardware" mac addresses. bond0 takes
MAC from first interface of the bond when not explicitly set.
4) What happened instead
I wanted to change from ifupdown back to netplan/systemd-networkd. Thus I
installed netplan.io, delete /etc/network/interfaces, purged ifupdown and wrote
an yaml for netplan.
My Yaml looks as following
network:
version: 2
renderer: networkd
ethernets:
em1:
dhcp4: false
dhcp6: false
optional: true
em3:
dhcp4: false
dhcp6: false
optional: true
bonds:
bond-new:
interfaces: [em1, em3]
dhcp4: true
dhcp6: false
accept-ra: true
link-local: [ ipv6 ]
parameters:
mode: 802.3ad
mii-monitor-interval: 1
Netplan applies it without errors. Also, this represents the (working)
configuration I had with ifupdown.
Now when I apply this config, bond0 gets the following (random?) MAC address:
c2:ba:f9:db:xx:xx (xx for privacy)
Also, both interfaces em1 and em3 belonging to that bond get the same MAC
address. This actual "hardware" MAC address is obviously another. Strangely,
all interfaces get the same MAC address:
# ip a | grep c2:ba:f9:db:ed:4b -B 1
2: em1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master
bond-new state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master
bond-new state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
--
8: bond-new: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
Additionally every device added to this bond will get the same MAC
address, e. g. em2:
3: em2: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master
bond-new state DOWN group default qlen 1000
link/ether c2:ba:f9:db:xx:xx brd ff:ff:ff:ff:ff:ff
I already set MACAddressPolicy=none in
/lib/systemd/network/99-default.link, but it does no change this
behavior.
Removing an interface from the bond, does not revert the MAC. When I
purge netplan.io and install ifupdown, the real MAC address is set to
interfaces again.
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