| Version 4 (modified by mitty, 15 years ago) (diff) |
|---|
VMによるネットワークテスト
network map
WAN
|
|
Windows (NAT)
192.168.40.1
|
|
((( 192.168.40.0/24 )))
| |
| |
192.168.40.10 192.168.40.20
| *
<eth0> <eth0>
[[ubuntu-outer]] <<centos-outer>>
<eth1> <eth1>
*(10.0.0.254) |
10.0.0.10 10.0.0.20
| |
| |
(10.0.0.0/16)
|
|
10.0.0.254
*(10.0.0.20)
<eth0>
<<ubuntu-router>>
<eth1> <eth2>
| |
10.1.0.254 10.2.0.254
| |
| |
((((( 10.1.0.0/16 ))))) ((((( 10.2.0.0/16 )))))
| | | | | | | |
| | | | | | | |
10.1.0.10 10.1.0.20 | 10.1.0.30 10.2.0.30 | | |
* | | | * / | |
<eth0> <eth1> | <eth0> <eth1> / | |
[[ubuntu-inner-AA]] | [[ubuntu-inner-AB]] / | |
| / | |
| / | |
10.1.0.110 10.2.0.110 10.2.0.10 10.2.0.20
| | * |
<eth1> <eth2> <eth0> <eth1>
[[centos-inner]] [[ubuntu-inner-BB]]
<eth0>
*
192.168.50.110
|
|
192.168.50.1
Windows (NAT)
|
|
WAN
- ((()))
- LANセグメント
- [[]]
- 通常ノード
- <<>>
- net.ipv4.ip_forward=1 になっているノード
- * が付いているNIC
- デフォルトゲートウェイ
- 候補が複数ある場合で、()で明示されていなければ、X.X.X.254がGW
問題点
- (10.0.0.0/16) にデフォルトゲートウェイが二つ設定されている
- ubuntu-outer -> 10.0.0.254(ubuntu-router)
- ubuntu-router -> 10.0.0.20(centos-outer)
- 解消版 => TipAndDoc/network/vmtest2
- IP masquerade設定がない
- centos-outer, centos-inner以外はWANに出られない
- => centos-outerにIP masqueradeを設定すればよい => wiki:TipAndDoc/network/vmtest/masquerade?
設定
centos-outer
- centos-outer ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0 BOOTPROTO=static IPADDR=192.168.40.20 NETMASK=255.255.255.0 NETWORK=192.168.40.0 GATEWAY=192.168.40.1 ONBOOT=yes
- centos-outer ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1 BOOTPROTO=static IPADDR=10.0.0.20 NETMASK=255.255.0.0 NETWORK=10.0.0.0 ONBOOT=yes
- centos-outer ~]# route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.40.0 * 255.255.255.0 U 0 0 0 eth0 10.0.0.0 * 255.255.0.0 U 0 0 0 eth1 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1 default 192.168.40.1 0.0.0.0 UG 0 0 0 eth0
- centos-outer ~]# ip route
192.168.40.0/24 dev eth0 proto kernel scope link src 192.168.40.20 10.0.0.0/16 dev eth1 proto kernel scope link src 10.0.0.20 169.254.0.0/16 dev eth1 scope link default via 192.168.40.1 dev eth0
ubuntu-outer
- ubuntu-outer:~$ cat /etc/network/interfaces
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.40.10 netmask 255.255.255.0 network 192.168.40.0 auto eth1 iface eth1 inet static address 10.0.0.10 netmask 255.255.0.0 network 10.0.0.0 gateway 10.0.0.254 - ubuntu-outer:~$ route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.40.0 * 255.255.255.0 U 0 0 0 eth0 10.0.0.0 * 255.255.0.0 U 0 0 0 eth1 default 10.0.0.254 0.0.0.0 UG 100 0 0 eth1
- ubuntu-outer:~$ ip route
192.168.40.0/24 dev eth0 proto kernel scope link src 192.168.40.10 10.0.0.0/16 dev eth1 proto kernel scope link src 10.0.0.10 default via 10.0.0.254 dev eth1 metric 100
ubuntu-router
- ubuntu-router:~$ cat /etc/network/interfaces
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.0.0.254 netmask 255.255.0.0 network 10.0.0.0 gateway 10.0.0.20 auto eth1 iface eth1 inet static address 10.1.0.254 netmask 255.255.0.0 network 10.1.0.0 auto eth2 iface eth2 inet static address 10.2.0.254 netmask 255.255.0.0 network 10.2.0.0 - ubuntu-router:~$ route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.2.0.0 * 255.255.0.0 U 0 0 0 eth2 10.0.0.0 * 255.255.0.0 U 0 0 0 eth0 10.1.0.0 * 255.255.0.0 U 0 0 0 eth1 default 10.0.0.20 0.0.0.0 UG 100 0 0 eth0
- ubuntu-router:~$ ip route
10.2.0.0/16 dev eth2 proto kernel scope link src 10.2.0.254 10.0.0.0/16 dev eth0 proto kernel scope link src 10.0.0.254 10.1.0.0/16 dev eth1 proto kernel scope link src 10.1.0.254 default via 10.0.0.20 dev eth0 metric 100
ubuntu-inner-AA
- ubuntu-inner-AA:~$ cat /etc/network/interfaces
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.1.0.10 netmask 255.255.0.0 network 10.1.0.0 gateway 10.1.0.254 auto eth1 iface eth1 inet static address 10.1.0.20 netmask 255.255.0.0 network 10.1.0.0 - ubuntu-inner-AA:~$ route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.1.0.0 * 255.255.0.0 U 0 0 0 eth0 10.1.0.0 * 255.255.0.0 U 0 0 0 eth1 default 10.1.0.254 0.0.0.0 UG 100 0 0 eth0
- ubuntu-inner-AA:~$ ip route
10.1.0.0/16 dev eth0 proto kernel scope link src 10.1.0.10 10.1.0.0/16 dev eth1 proto kernel scope link src 10.1.0.20 default via 10.1.0.254 dev eth0 metric 100
ubuntu-inner-AB
- ubuntu-inner-AB:~$ cat /etc/network/interfaces
{{{auto lo iface lo inet loopback
auto eth0 iface eth0 inet static
address 10.1.0.30 netmask 255.255.0.0 network 10.1.0.0
auto eth1 iface eth1 inet static
address 10.2.0.30 netmask 255.255.0.0 network 10.2.0.0 gateway 10.2.0.254
}}}
- ubuntu-inner-AB:~$ route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.2.0.0 * 255.255.0.0 U 0 0 0 eth1 10.1.0.0 * 255.255.0.0 U 0 0 0 eth0 default 10.2.0.254 0.0.0.0 UG 100 0 0 eth1
- ubuntu-inner-AB:~$ ip route
10.2.0.0/16 dev eth1 proto kernel scope link src 10.2.0.30 10.1.0.0/16 dev eth0 proto kernel scope link src 10.1.0.30 default via 10.2.0.254 dev eth1 metric 100
ubuntu-inner-BB
- ubuntu-inner-BB:~$ cat /etc/network/interfaces
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.2.0.10 netmask 255.255.0.0 network 10.2.0.0 gateway 10.2.0.254 auto eth1 iface eth1 inet static address 10.2.0.20 netmask 255.255.0.0 network 10.2.0.0 - ubuntu-inner-BB:~$ route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.2.0.0 * 255.255.0.0 U 0 0 0 eth0 10.2.0.0 * 255.255.0.0 U 0 0 0 eth1 default 10.2.0.254 0.0.0.0 UG 100 0 0 eth0
- ubuntu-inner-BB:~$ ip route
10.2.0.0/16 dev eth0 proto kernel scope link src 10.2.0.10 10.2.0.0/16 dev eth1 proto kernel scope link src 10.2.0.20 default via 10.2.0.254 dev eth0 metric 100
centos-inner
- centos-inner ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0 BOOTPROTO=static IPADDR=192.168.50.110 NETMASK=255.255.255.0 NETWORK=192.168.50.0 GATEWAY=192.168.50.1 ONBOOT=yes
- centos-inner ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1 BOOTPROTO=static IPADDR=10.1.0.110 NETMASK=255.255.0.0 NETWORK=10.1.0.0 ONBOOT=yes
- centos-inner ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth2
DEVICE=eth2 BOOTPROTO=static IPADDR=10.2.0.110 NETMASK=255.255.0.0 NETWORK=10.2.0.0 ONBOOT=yes
- centos-inner ~]# route
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.50.0 * 255.255.255.0 U 0 0 0 eth0 10.2.0.0 * 255.255.0.0 U 0 0 0 eth2 10.1.0.0 * 255.255.0.0 U 0 0 0 eth1 169.254.0.0 * 255.255.0.0 U 0 0 0 eth2 default 192.168.50.1 0.0.0.0 UG 0 0 0 eth0
- centos-inner ~]# ip route
192.168.50.0/24 dev eth0 proto kernel scope link src 192.168.50.110 10.2.0.0/16 dev eth2 proto kernel scope link src 10.2.0.110 10.1.0.0/16 dev eth1 proto kernel scope link src 10.1.0.110 169.254.0.0/16 dev eth2 scope link default via 192.168.50.1 dev eth0
