在我更新主机上的 CPU（和 BIOS）后，我当前的 KVM 设置被破坏，我无法弄清楚原因：我的 KVM 来宾启动后大约 10 秒，我无法从两个主机访问互联网或客户。我的 LAN 内的连接似乎仍然有效（即，我仍然能够通过 ssh 从 LAN 内连接到主机/服务器，现有的 VNC 连接保持不变）。
启动虚拟机之前
我在我的主机上运行 Debian 11，并且有一些 Ubuntu kvm guest 虚拟机。在启动客人之前（我只使用一名客人goingmerry），一切正常：
$ ping www.google.com
PING www.google.com (142.250.185.68) 56(84) bytes of data.
64 bytes from fra16s48-in-f4.1e100.net (142.250.185.68): icmp_seq=1 ttl=118 time=13.7 ms
64 bytes from fra16s48-in-f4.1e100.net (142.250.185.68): icmp_seq=2 ttl=118 time=12.8 ms
64 bytes from fra16s48-in-f4.1e100.net (142.250.185.68): icmp_seq=3 ttl=118 time=12.8 ms
64 bytes from fra16s48-in-f4.1e100.net (142.250.185.68): icmp_seq=4 ttl=118 time=12.8 ms
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 enp5s0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-b30cdaf25b27
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 enp5s0
192.168.2.2 0.0.0.0 255.255.255.255 UH 0 0 0 enp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
（您可以看到 KVM 的虚拟网络已经启动（virbr0在 中route -n）。
VM启动后（网络中断）
然后我启动我的 KVM 来宾，启动后很短的时间内一切都很好（我可以通过 VNC 或 Spice 连接，打开浏览器并访问网站）主机和客户端上的互联网连接都中断。例如在主机上会发生这种情况：
$ ping www.google.com
PING www.google.com (142.250.185.68) 56(84) bytes of data.
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=42 ttl=119 time=12.2 ms
[...snip ... ]
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=68 ttl=119 time=12.5 ms
From myhost.local (169.254.254.122) icmp_seq=69 Destination Host Unreachable
From myhost.local (169.254.254.122) icmp_seq=70 Destination Host Unreachable
From myhost.local (169.254.254.122) icmp_seq=71 Destination Host Unreachable
From myhost.local (169.254.254.122) icmp_seq=72 Destination Host Unreachable
我不知道为什么 ping 消息会在这里提到myhost.local（myhost我的主机的主机名在哪里）。
来宾运行时的一些其他输出：
# cat /etc/network/interfaces
auto lo
iface lo inet loopback
auto enp5s0
iface enp5s0 inet static
address 192.168.2.32
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.1
dns-nameserver 192.168.2.22
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 vnet0
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 enp5s0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vnet0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-b30cdaf25b27
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 enp5s0
192.168.2.2 0.0.0.0 255.255.255.255 UH 0 0 0 enp5s0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
# resolvectl status
Global
Protocols: +LLMNR +mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: foreign
Current DNS Server: 192.168.2.2
DNS Servers: 192.168.2.2
DNS Domain: lan
Link 2 (enp5s0)
Current Scopes: LLMNR/IPv4 LLMNR/IPv6
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Link 3 (br-b30cdaf25b27)
Current Scopes: none
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Link 4 (docker0)
Current Scopes: none
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Link 5 (virbr0)
Current Scopes: LLMNR/IPv4
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Link 6 (vnet0)
Current Scopes: LLMNR/IPv4 LLMNR/IPv6
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
olor]}
root@myhost:/home/tom# 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
valid_lft forever preferred_lft forever
2: enp5s0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 04:d9:f5:7d:c2:65 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.32/24 brd 192.168.2.255 scope global enp5s0
valid_lft forever preferred_lft forever
inet6 fe80::6d9:f5ff:fe7d:c265/64 scope link
valid_lft forever preferred_lft forever
3: br-b30cdaf25b27: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:2f:43:d7:32 brd ff:ff:ff:ff:ff:ff
inet 172.18.0.1/16 brd 172.18.255.255 scope global br-b30cdaf25b27
valid_lft forever preferred_lft forever
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:d1:c1:1e:35 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
5: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 52:54:00:ca:96:bd brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
6: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master virbr0 state UNKNOWN group default qlen 1000
link/ether fe:54:00:a0:ac:92 brd ff:ff:ff:ff:ff:ff
inet 169.254.254.122/16 brd 169.254.255.255 scope global vnet0
valid_lft forever preferred_lft forever
inet6 fe80::fc54:ff:fea0:ac92/64 scope link
valid_lft forever preferred_lft forever
这是我在var/log/syslog客人开始时看到的：
Oct 31 09:28:47 myhost kernel: [ 518.943125] audit: type=1400 audit(1667204927.827:13): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=2946 comm="apparmor_parser"
Oct 31 09:28:47 myhost kernel: [ 519.075453] audit: type=1400 audit(1667204927.963:14): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=2949 comm="apparmor_parser"
Oct 31 09:28:48 myhost kernel: [ 519.204926] audit: type=1400 audit(1667204928.091:15): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=2953 comm="apparmor_parser"
Oct 31 09:28:48 myhost kernel: [ 519.316702] audit: type=1400 audit(1667204928.203:16): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=2957 comm="apparmor_parser"
Oct 31 09:28:48 myhost systemd[1]: Started Virtual machine log manager.
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {create} index 6 type 1 <ETHER>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {update} flags 4098 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address EA:31:34:19:13:E9 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: Adding interface vnet0 [ ethernet ]
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: virbr0 {newlink} index 5 address 52:54:00:CA:96:BD mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: virbr0 {newlink} index 5 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {update} flags 69699 <UP,RUNNING,LOWER_UP>
Oct 31 09:28:48 myhost kernel: [ 519.396033] tun: Universal TUN/TAP device driver, 1.6
Oct 31 09:28:48 myhost kernel: [ 519.397012] virbr0: port 1(vnet0) entered blocking state
Oct 31 09:28:48 myhost kernel: [ 519.397019] virbr0: port 1(vnet0) entered disabled state
Oct 31 09:28:48 myhost kernel: [ 519.397225] device vnet0 entered promiscuous mode
Oct 31 09:28:48 myhost kernel: [ 519.397767] virbr0: port 1(vnet0) entered blocking state
Oct 31 09:28:48 myhost kernel: [ 519.397776] virbr0: port 1(vnet0) entered listening state
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:48 myhost systemd-udevd[2968]: Using default interface naming scheme 'v247'.
Oct 31 09:28:48 myhost systemd-udevd[2968]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {add} route fe80:: gw :: scope 0 <UNIVERSE>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:48 myhost kernel: [ 519.499991] audit: type=1400 audit(1667204928.387:17): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=2979 comm="apparmor_parser"
Oct 31 09:28:48 myhost systemd[1]: Started Virtual Machine qemu-1-goingmerry.
Oct 31 09:28:48 myhost kernel: [ 519.564602] audit: type=1400 audit(1667204928.451:18): apparmor="DENIED" operation="capable" profile="libvirtd" pid=1350 comm="rpc-worker" capability=39 capname="bpf"
Oct 31 09:28:48 myhost kernel: [ 519.565110] audit: type=1400 audit(1667204928.451:19): apparmor="DENIED" operation="capable" profile="libvirtd" pid=1350 comm="rpc-worker" capability=38 capname="perfmon"
Oct 31 09:28:48 myhost libvirtd[2983]: 2022-10-31 08:28:48.458+0000: 2983: info : libvirt version: 7.0.0, package: 3 (Andrea Bolognani <[email protected]> Fri, 26 Feb 2021 16:46:34 +0100)
Oct 31 09:28:48 myhost libvirtd[2983]: 2022-10-31 08:28:48.458+0000: 2983: info : hostname: myhost
Oct 31 09:28:48 myhost libvirtd[2983]: 2022-10-31 08:28:48.458+0000: 2983: warning : virSecurityValidateTimestamp:206 : Invalid XATTR timestamp detected on /srv/vm/lubuntu-1910.qcow2 secdriver=dac
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:48 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:50 myhost avahi-daemon[1220]: Joining mDNS multicast group on interface vnet0.IPv6 with address fe80::fc54:ff:fea0:ac92.
Oct 31 09:28:50 myhost avahi-daemon[1220]: New relevant interface vnet0.IPv6 for mDNS.
Oct 31 09:28:50 myhost avahi-daemon[1220]: Registering new address record for fe80::fc54:ff:fea0:ac92 on vnet0.*.
Oct 31 09:28:50 myhost kernel: [ 521.411396] virbr0: port 1(vnet0) entered learning state
Oct 31 09:28:50 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:50 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:52 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:52 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:52 myhost connmand[1223]: virbr0 {update} flags 69699 <UP,RUNNING,LOWER_UP>
Oct 31 09:28:52 myhost connmand[1223]: virbr0 {newlink} index 5 address 52:54:00:CA:96:BD mtu 1500
Oct 31 09:28:52 myhost connmand[1223]: virbr0 {newlink} index 5 operstate 6 <UP>
Oct 31 09:28:52 myhost kernel: [ 523.427132] virbr0: port 1(vnet0) entered forwarding state
Oct 31 09:28:52 myhost kernel: [ 523.427136] virbr0: topology change detected, propagating
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {RX} 0 packets 0 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {TX} 1 packets 590 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {RX} 0 packets 0 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {TX} 1 packets 590 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {RX} 0 packets 0 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {TX} 1 packets 590 bytes
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:28:55 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 0 <UNKNOWN>
Oct 31 09:28:57 myhost dnsmasq-dhcp[2932]: DHCPREQUEST(virbr0) 192.168.122.208 52:54:00:a0:ac:92
Oct 31 09:28:57 myhost dnsmasq-dhcp[2932]: DHCPACK(virbr0) 192.168.122.208 52:54:00:a0:ac:92 goingmerry
Oct 31 09:29:28 myhost avahi-daemon[1220]: Joining mDNS multicast group on interface vnet0.IPv4 with address 169.254.254.122.
Oct 31 09:29:28 myhost avahi-daemon[1220]: New relevant interface vnet0.IPv4 for mDNS.
Oct 31 09:29:28 myhost avahi-daemon[1220]: Registering new address record for 169.254.254.122 on vnet0.IPv4.
Oct 31 09:29:28 myhost connmand[1223]: vnet0 {add} address 169.254.254.122/16 label vnet0 family 2
Oct 31 09:29:28 myhost connmand[1223]: vnet0 {add} route 169.254.0.0 gw 0.0.0.0 scope 253 <LINK>
Oct 31 09:29:28 myhost connmand[1223]: vnet0 {add} route 0.0.0.0 gw 0.0.0.0 scope 253 <LINK>
关闭虚拟机。
一旦我关闭 KVM 来宾，主机上的连接就会恢复：
$ ping www.google.com
PING www.google.com (142.250.186.100) 56(84) bytes of data.
From serenity.local (169.254.254.122) icmp_seq=1 Destination Host Unreachable
[...snip...]
From serenity.local (169.254.254.122) icmp_seq=53 Destination Host Unreachable
From serenity.local (169.254.254.122) icmp_seq=54 Destination Host Unreachable
From serenity.local (169.254.254.122) icmp_seq=55 Destination Host Unreachable
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=57 ttl=119 time=12.6 ms
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=58 ttl=119 time=12.4 ms
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=59 ttl=119 time=12.3 ms
64 bytes from fra24s06-in-f4.1e100.net (142.250.186.100): icmp_seq=60 ttl=119 time=12.5 ms
# tail /var/log/syslog
Oct 31 09:53:05 myhost avahi-daemon[1220]: Interface vnet0.IPv6 no longer relevant for mDNS.
Oct 31 09:53:05 myhost kernel: [ 1976.540921] virbr0: port 1(vnet0) entered disabled state
Oct 31 09:53:05 myhost kernel: [ 1976.541608] device vnet0 left promiscuous mode
Oct 31 09:53:05 myhost kernel: [ 1976.541616] virbr0: port 1(vnet0) entered disabled state
Oct 31 09:53:05 myhost avahi-daemon[1220]: Leaving mDNS multicast group on interface vnet0.IPv6 with address fe80::fc54:ff:fea0:ac92.
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {RX} 176 packets 28758 bytes
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {TX} 1332 packets 162018 bytes
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {update} flags 4098 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:53:05 myhost avahi-daemon[1220]: Interface vnet0.IPv4 no longer relevant for mDNS.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Leaving mDNS multicast group on interface vnet0.IPv4 with address 169.254.254.122.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Withdrawing address record for fe80::fc54:ff:fea0:ac92 on vnet0.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Withdrawing address record for 169.254.254.122 on vnet0.
Oct 31 09:53:05 myhost connmand[1223]: Removing default interface route failed (No such device)
Oct 31 09:53:05 myhost connmand[1223]: Removing default interface route failed (No such device)
Oct 31 09:53:05 myhost connmand[1223]: Removing default interface route failed (No such device)
Oct 31 09:53:05 myhost avahi-daemon[1220]: Withdrawing address record for ::1 on lo.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Leaving mDNS multicast group on interface lo.IPv6 with address ::1.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Interface lo.IPv6 no longer relevant for mDNS.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Withdrawing address record for fe80::6d9:f5ff:fe7d:c265 on enp5s0.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Leaving mDNS multicast group on interface enp5s0.IPv6 with address fe80::6d9:f5ff:fe7d:c265.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Interface enp5s0.IPv6 no longer relevant for mDNS.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Joining mDNS multicast group on interface lo.IPv6 with address ::1.
Oct 31 09:53:05 myhost avahi-daemon[1220]: New relevant interface lo.IPv6 for mDNS.
Oct 31 09:53:05 myhost avahi-daemon[1220]: Registering new address record for ::1 on lo.*.
Oct 31 09:53:05 myhost connmand[1223]: (null) {del} route fe80:: gw :: scope 0 <UNIVERSE>
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: (null) {del} address 169.254.254.122/16 label vnet0
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 address FE:54:00:A0:AC:92 mtu 1500
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {newlink} index 6 operstate 2 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {dellink} index 6 operstate 2 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: (null) {remove} index 6
Oct 31 09:53:05 myhost connmand[1223]: Remove interface (null) [ ethernet ]
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {RX} 176 packets 26294 bytes
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {TX} 165 packets 47346 bytes
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {update} flags 4163 <UP,RUNNING>
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {newlink} index 5 address 52:54:00:CA:96:BD mtu 1500
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {newlink} index 5 operstate 6 <UP>
Oct 31 09:53:05 myhost connmand[1223]: vnet0 {dellink} index 6 operstate 2 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {RX} 176 packets 26294 bytes
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {TX} 165 packets 47346 bytes
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {update} flags 4099 <UP>
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {newlink} index 5 address 52:54:00:CA:96:BD mtu 1500
Oct 31 09:53:05 myhost connmand[1223]: virbr0 {newlink} index 5 operstate 2 <DOWN>
Oct 31 09:53:05 myhost connmand[1223]: enp5s0 {del} route fe80:: gw :: scope 0 <UNIVERSE>
Oct 31 09:53:05 myhost connmand[1223]: enp5s0 {add} route fe80:: gw :: scope 0 <UNIVERSE>
Oct 31 09:53:05 myhost systemd[1]: machine-qemu\x2d1\x2dgoingmerry.scope: Succeeded.
Oct 31 09:53:05 myhost systemd[1]: machine-qemu\x2d1\x2dgoingmerry.scope: Consumed 1min 29.000s CPU time.
Oct 31 09:53:05 myhost kernel: [ 1976.813274] audit: type=1400 audit(1667206385.703:20): apparmor="STATUS" operation="profile_remove" profile="unconfined" name="libvirt-24a0099b-399b-4737-b766-6c64a25c18f7" pid=3352 comm="apparmor_parser"
Oct 31 09:53:06 myhost avahi-daemon[1220]: Joining mDNS multicast group on interface enp5s0.IPv6 with address fe80::6d9:f5ff:fe7d:c265.
Oct 31 09:53:06 myhost avahi-daemon[1220]: New relevant interface enp5s0.IPv6 for mDNS.
Oct 31 09:53:06 myhost avahi-daemon[1220]: Registering new address record for fe80::6d9:f5ff:fe7d:c265 on enp5s0.*.
我在这里完全不知所措，不知道发生了什么或如何解决它。任何帮助将不胜感激。