我有一台 centOS 机器 (10.0.0.4)，上面运行着两个 vagrant 盒子，10.0.2.15 和 10.0.3.15。
这两个 vagrant 盒子之间可以联网吗？
对于 10.0.2.15
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.2.2 0.0.0.0 UG 100 0 0 eth0
10.0.2.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
10.0.2.0 0.0.0.0 255.255.255.0 U 101 0 0 eth1
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.219.64 0.0.0.0 255.255.255.192 U 0 0 0 *
192.168.219.68 0.0.0.0 255.255.255.255 UH 0 0 0 calibe3d69d2768
ip addr
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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 85785sec preferred_lft 85785sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:c7:8e:4c brd ff:ff:ff:ff:ff:ff
inet 10.0.2.10/24 brd 10.0.2.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fec7:8e4c/64 scope link
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:fc:ea:65:26 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
5: calibe3d69d2768@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether ee:ee:ee:ee:ee:ee brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::ecee:eeff:feee:eeee/64 scope link
valid_lft forever preferred_lft forever
6: tunl0@NONE: <NOARP,UP,LOWER_UP> mtu 1440 qdisc noqueue state UNKNOWN group default qlen 1000
link/ipip 0.0.0.0 brd 0.0.0.0
inet 192.168.219.64/32 brd 192.168.219.64 scope global tunl0
valid_lft forever preferred_lft forever
对于 10.0.3.15
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.3.2 0.0.0.0 UG 100 0 0 eth0
10.0.3.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
ip addr
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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.3.15/24 brd 10.0.3.255 scope global noprefixroute dynamic eth0
valid_lft 85457sec preferred_lft 85457sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:93:4b:93:33 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
对于 10.0.0.1
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 vboxnet0
168.63.129.16 10.0.0.1 255.255.255.255 UGH 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
169.254.169.254 10.0.0.1 255.255.255.255 UGH 0 0 0 eth0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:0d:3a:06:5e:cf brd ff:ff:ff:ff:ff:ff
inet 10.0.0.4/24 brd 10.0.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::20d:3aff:fe06:5ecf/64 scope link
valid_lft forever preferred_lft forever
3: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 02:42:45:a0:80:5a 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
inet6 fe80::42:45ff:fea0:805a/64 scope link
valid_lft forever preferred_lft forever
5: vetheefdb4e@if4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP
link/ether de:7d:18:e9:25:e9 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::dc7d:18ff:fee9:25e9/64 scope link
valid_lft forever preferred_lft forever
11: veth6665af6@if10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP
link/ether ba:db:33:b6:56:88 brd ff:ff:ff:ff:ff:ff link-netnsid 1
inet6 fe80::b8db:33ff:feb6:5688/64 scope link
valid_lft forever preferred_lft forever
12: vboxnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.1/24 brd 10.0.2.255 scope global vboxnet0
valid_lft forever preferred_lft forever
inet6 fe80::800:27ff:fe00:0/64 scope link
valid_lft forever preferred_lft forever
答案1
如果您将每一侧的网络掩码减少到 /23，它们将无需路由器即可相互通信（前提是它们桥接在一起）。
另一种方法是在至少一个盒子上配置来自另一个子网的第二个 IP 地址，或者将其一起移动（两者都需要桥接）。
否则，您将需要一个路由器。
答案2
选项 1：您可以从每个客户子网中为您的主机提供 IP，将主机的 IP 设置为客户中的默认网关（每个客户来自各自的子网），并在主机上激活 IP 转发。这样您的主机将充当路由器。
选项 2：为这两个盒子创建一个新的网桥，并使用新网络连接它们
我看到您使用 xxx2 作为默认网关。该 IP 属于谁？考虑到您的主机有一个来自 10.0.2.0/24 的 IP 地址，但没有来自 10.0.3.0/24，您的配置中也存在一些不一致的地方……也许我遗漏了什么。