我正在尝试为 xen 虚拟设备创建一个连接桥。br0 似乎已启动，但它不会获取 IP，并且 br0 上的本地 ipv6 链接也无法访问
root@Inspiron15:/home/# ifconfig
br0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet6 fe80::6087:a7ff:feeb:ae35 prefixlen 64 scopeid 0x20<link>
ether 62:87:a7:eb:ae:35 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5 bytes 414 (414.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enx4ce173422757: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 4c:e1:73:42:27:57 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 1318 bytes 142311 (142.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1318 bytes 142311 (142.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp0s20f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.123 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::f285:75ec:cbfc:756 prefixlen 64 scopeid 0x20<link>
ether 40:1c:83:fb:2f:48 txqueuelen 1000 (Ethernet)
RX packets 30775 bytes 19053551 (19.0 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 27176 bytes 4228112 (4.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
和
root@Inspiron15:/home/# nmcli device status
DEVICE TYPE STATE CONNECTION
wlp0s20f3 wifi connected getAjobFool
br0 bridge connecting (getting IP configuration) netplan-br0
88:36:5F:01:0A:B5 bt disconnected --
BC:98:DF:6A:17:C1 bt disconnected --
p2p-dev-wlp0s20f3 wifi-p2p disconnected --
enx4ce173422757 ethernet unavailable --
lo loopback unmanaged --
我尝试在 netplan 中为其指定一个静态 IP，但这却导致我的 wifi 和 br0 都瘫痪了。
root@Inspiron15:/home/# cat /etc/netplan/01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
network:
ethernets:
wlp0s20f3:
dhcp4: true
version: 2
bridges:
br0:
interfaces: [wlp0s20f3]
dhcp4: yes
#addresses: [192.168.1.230/24]
#gateway4: 192.168.1.1
我跑
netplan generate
和
netplan apply
我也尝试直接在接口上手动启动 dhcp。
dhclient br0
它只是挂了
如何使 dhcp 在我的 br0 上工作？
操作系统：Ubuntu 20.04.2 LTS 桌面
更新：我尝试了另外 2 个无线网卡，只是想看看是否与硬件有关。另外两个也有同样的问题。
桥接驱动程序似乎已加载到内核中。
# find /lib/modules/$(uname -r) -type f -name '*.ko'|grep bridge
/lib/modules/5.8.0-55-generic/kernel/net/bridge/bridge.ko
答案1
您的 netplan 配置中存在一些错误。
- 重复的网络部分
- 重复的版本密钥
- 我认为您不应该在接口 wlp0s20f3 上启用 DHCP，而应该仅在桥上启用 DHCP。
像这样：
network:
version: 2
renderer: NetworkManager
ethernets:
wlp0s20f3:
dhcp4: false
bridges:
br0:
interfaces: [wlp0s20f3]
dhcp4: yes
答案2
我尝试了以太网卡，它立即出现了。然后我发现了这个。
It doesn't work with my Wireless card!
This is a known problem, and it is not caused by the bridge code. Many wireless cards don't allow spoofing of the source address. It is a firmware restriction with some chipsets. You might find some information in the bridge mailing list archives to help. Has anyone found a way to get around Wavelan not allowing anything but its own MAC address? (answer by Michael Renzmann (mrenzmann at compulan.de))
Well, for 99% of computer users there will never be a way to get rid of this. For this function a special firmware is needed. This firmware can be loaded into the RAM of any WaveLAN card, so it could do its job with bridging. But there is no documentation on the interface available to the public. The only way to achieve this is to have a full version of the hcf library which controls every function of the card and also allows accessing the card's RAM. To get this full version Lucent wants to know that it will be a financial win for them, also you have to sign an NDA. So be sure that you won't most probably get access to this peace of software until Lucent does not change its mind in this (which I doubt never will happen).