*** This bug is a duplicate of bug 2111231 ***
https://bugs.launchpad.net/bugs/2111231
------- Comment From [email protected] 2025-09-17 03:45 EDT-------
Hi Team,
I have tested the issue on the latest Ubuntu 25.10 (Questing Quokka)
with kernel 6.17.0-4-generic. The issue is NOT reproducible.
The interface gets attached successfully and immediately reflects in the
guest without any reboot required.
------ uname output ------
root@ubuntu:~# uname -a
Linux ubuntu 6.17.0-4-generic #4-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 8 16:14:41
UTC 2025 ppc64le ppc64le ppc64le GNU/Linux
---- steps followed ------
1) Install Lpar with ubuntu 25.10 and guest with same OS
2) Attach interface isong virsh attach-interface command. And check if it
reflects immediately after command is successfull
3) the interface gets attached successfully without any issues and also seen in
the xml file.
root@ubuntu:/home# virsh attach-interface --live vm1 bridge --source virbr0
Interface attached successfully
root@ubuntu:/home# virsh dumpxml vm1 | awk '/<interface/,/<\/interface>/'
<interface type='bridge'>
<mac address='52:54:00:0b:58:d0'/>
<source bridge='virbr0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='52:54:00:04:05:86'/>
<source bridge='virbr0'/>
<target dev='vnet1'/>
<model type='rtl8139'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</interface>
------- on guest -------
root@guest:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp0s1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether 52:54:00:0b:58:d0 brd ff:ff:ff:ff:ff:ff
altname enx5254000b58d0
inet 192.168.122.212/24 metric 100 brd 192.168.122.255 scope global dynamic
enp0s1
valid_lft 3183sec preferred_lft 3183sec
inet6 fe80::5054:ff:fe0b:58d0/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
3: enp0s7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
qlen 1000
link/ether 52:54:00:04:05:86 brd ff:ff:ff:ff:ff:ff
altname enx525400040586
Thank you,
Tasmiya
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https://bugs.launchpad.net/bugs/2110407
Title:
[Ubuntu25.04] "virsh attach-interface" requires a reboot to reflect
the attached interfaces on the guest
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