我们有 Debian 10，它有两个物理接口，我们将其桥接到 KVM。
我遇到的问题是，当我从虚拟操作系统关闭端口或断开电缆时，主机映像 (Debian 10) 的桥接和物理接口仍然会显示。并且在虚拟机中也会显示。可能是什么原因？下面是我的网络配置文件。
# Backplane ("internal") network interface
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet static
address 192.168.0.4
netmask 255.255.255.0
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
# Front panel (RJ45) network interface
auto eth1
iface eth1 inet manual
auto br1
iface br1 inet static
address 192.168.1.4
netmask 255.255.255.0
gateway 192.168.1.1
bridge_ports eth1
bridge_stp off
bridge_fd 0
bridge_maxwait 0
ip 链接输出
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br1 state UP mode DEFAULT group default qlen 1000
link/ether 94:b8:c5:9a:63:58 brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state UP mode DEFAULT group default qlen 1000
link/ether 94:b8:c5:9a:63:59 brd ff:ff:ff:ff:ff:ff
4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 94:b8:c5:9a:63:59 brd ff:ff:ff:ff:ff:ff
5: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 94:b8:c5:9a:63:58 brd ff:ff:ff:ff:ff:ff
10: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br1 state UNKNOWN mode DEFAULT group default qlen 1000
link/ether fe:54:00:24:91:84 brd ff:ff:ff:ff:ff:ff
11: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN mode DEFAULT group default qlen 1000
link/ether fe:54:00:09:c5:f9 brd ff:ff:ff:ff:ff:ff