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尽管 br0 已存在，但“无法启动提升网络接口”

tag-icon • tag-icon linux debian boot systemctl
尽管 br0 已存在，但“无法启动提升网络接口”

我已经在 Debian 9.6 框上设置了两个桥接设备并systemctl status networking.service声称桥接br1未设置，即使在启动后它实际上很好：

% systemctl status networking.service
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sun 2018-12-23 17:27:22 CET; 5min ago
     Docs: man:interfaces(5)
  Process: 591 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
  Process: 586 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=exited, status=0/SUCCESS)
 Main PID: 591 (code=exited, status=1/FAILURE)

Dec 23 17:27:21 irys systemd[1]: Starting Raise network interfaces...
Dec 23 17:27:21 irys ifup[591]: Waiting for br1 to get ready (MAXWAIT is 60 seconds).
Dec 23 17:27:22 irys ifup[591]: Waiting for br0 to get ready (MAXWAIT is 60 seconds).
Dec 23 17:27:22 irys ifup[591]: RTNETLINK answers: File exists
Dec 23 17:27:22 irys ifup[591]: ifup: failed to bring up br0
Dec 23 17:27:22 irys systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Dec 23 17:27:22 irys systemd[1]: Failed to start Raise network interfaces.
Dec 23 17:27:22 irys systemd[1]: networking.service: Unit entered failed state.
Dec 23 17:27:22 irys systemd[1]: networking.service: Failed with result 'exit-code'.

启动后：

% brctl show
bridge name bridge id       STP enabled interfaces
br0     8000.00259086c729   no      enp6s0
br1     8000.00259086c728   no      enp5s0

我的接口设置：

% cat  interfaces

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug enp5s0
allow-hotplug enp6s0

auto br1
iface br1 inet static
    address 192.168.1.212
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255
    gateway 192.168.1.254
    dns-search example.com
        bridge_ports enp5s0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off
    bridge_maxwait 60

auto br0
iface br0 inet static
    address 10.0.0.9
    netmask 255.0.0.0
    network 10.0.0.0
    broadcast 10.255.255.255
    gateway 10.0.0.254
    dns-search example.com
        bridge_ports enp6s0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off

所有网络、使用网络的服务均运行良好。

我该如何解决这个问题？我的意思是，为什么systemctl声称br0在提出时br1没有任何问题？

PS 在journalctl -b输出中我发现了这一点：

Dec 23 17:27:22 irys ifup[591]: Waiting for br0 to get ready (MAXWAIT is 60 seconds).
Dec 23 17:27:22 irys kernel: IPv6: ADDRCONF(NETDEV_UP): br0: link is not ready
Dec 23 17:27:22 irys ifup[591]: RTNETLINK answers: File exists
Dec 23 17:27:22 irys ifup[591]: ifup: failed to bring up br0

答案1

您可能需要刷新 br0。这对我有用：

sudo ip addr flush dev br0

答案2

可能与这个错误。我的家庭服务器也遇到了类似的问题，这个问题始于一周前。这很奇怪，因为bridge-utils稳定版已经很久没有更新了。更新的内容例如iproute2。我认为这些包是密切相关的，并且错误中解释的竞争条件可以解释这种情况。

答案3

从另一个接口删除重复的 IP 地址，然后刷新桥接接口，这个问题就解决了。

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