T
tros
Guest
We have the following scenario:
- switch 48 ports (level 3) configured with two vlans
- centOS server configured with 3 network cards, so we have 3 different interfaces.
One of this interfaces (eth1) is directly connected to the router so we have internet connection. The other interface (eth0) is connected to a switch on one vlan. The last interface (eth2) is connected to the switch on the second vlan.
Each interface has at least 2 virtual machines.
We wanted internet connection on the virtual machines so we created a bridge between interfaces eth0 and eth2 to eth1 both (internet).
All the connections are made property but just the virtual machine on eth2 doesn't have internet connection and I don't know why ...
We supposed that the switch configuration is right. I think there is something missing on the centOS configuration, some file... but I can't see ...
I show here the different configuration files:
Interfaces:
eth0
DEVICE=eth0
HWADDR=ff:ff:ff:ff:ff:ff
ONBOOT=yes
IPADDR="192.168.1.2"
NETWORK="192.168.1.0"
PREFIX=24
NETMASK="255.255.255.0"
BRIDGE=bred1
NM_CONTROLLED=no
eth2
DEVICE=eth2
HWADDR=ff:ff:ff:ff:ff:ff
ONBOOT=yes
IPADDR="192.168.2.2"
NETWORK="192.168.2.0"
PREFIX=24
NETMASK="255.255.255.0"
BRIDGE=bred2
NM_CONTROLLED=no
eth1
DEVICE=eth1
HWADDR=ff:ff:ff:ff:ff:ff
BROADCAST=x.x.x.x
ONBOOT=yes
BOOTPROTO=static
IPADDR=x.x.x.x
NETMASK=255.255.255.0
NETWORK=x.x.x.x
GATEWAY=x.x.x.x
DNS1=8.8.8.8
DNS2=8.8.4.4
TYPE=Ethernet
DOMAIN="name.local"
Bridges :
Bred1:
DEVICE=bred1
TYPE=Bridge
BOOTPROTO=static
IPADDR="192.168.1.2"
NETMASK="255.255.255.0"
NETWORK="192.168.1.0"
PREFIX=24
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
Bred2:
DEVICE=bred2
TYPE=Bridge
BOOTPROTO=static
IPADDR="192.168.2.2"
NETMASK="255.255.255.0"
NETWORK="192.168.2.0"
PREFIX=24
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
Virtual Machines on eth0:
allow-hotplug eth0
interface eth inet static
address: 192.168.1.3
gw: 192.168.1.2
netmask: 255.255.255.0
network: 192.168.1.0
broadcast: 192.168.1.255
Virtual Machines on eth2:
allow-hotplug eth0
interface eth inet static
address: 192.168.2.3
gw: 192.168.2.2
netmask: 255.255.255.0
network: 192.168.2.0
broadcast: 192.168.2.255
Thanks a lot for your time. I appreciate it.
T.
- switch 48 ports (level 3) configured with two vlans
- centOS server configured with 3 network cards, so we have 3 different interfaces.
One of this interfaces (eth1) is directly connected to the router so we have internet connection. The other interface (eth0) is connected to a switch on one vlan. The last interface (eth2) is connected to the switch on the second vlan.
Each interface has at least 2 virtual machines.
We wanted internet connection on the virtual machines so we created a bridge between interfaces eth0 and eth2 to eth1 both (internet).
All the connections are made property but just the virtual machine on eth2 doesn't have internet connection and I don't know why ...
We supposed that the switch configuration is right. I think there is something missing on the centOS configuration, some file... but I can't see ...
I show here the different configuration files:
Interfaces:
eth0
DEVICE=eth0
HWADDR=ff:ff:ff:ff:ff:ff
ONBOOT=yes
IPADDR="192.168.1.2"
NETWORK="192.168.1.0"
PREFIX=24
NETMASK="255.255.255.0"
BRIDGE=bred1
NM_CONTROLLED=no
eth2
DEVICE=eth2
HWADDR=ff:ff:ff:ff:ff:ff
ONBOOT=yes
IPADDR="192.168.2.2"
NETWORK="192.168.2.0"
PREFIX=24
NETMASK="255.255.255.0"
BRIDGE=bred2
NM_CONTROLLED=no
eth1
DEVICE=eth1
HWADDR=ff:ff:ff:ff:ff:ff
BROADCAST=x.x.x.x
ONBOOT=yes
BOOTPROTO=static
IPADDR=x.x.x.x
NETMASK=255.255.255.0
NETWORK=x.x.x.x
GATEWAY=x.x.x.x
DNS1=8.8.8.8
DNS2=8.8.4.4
TYPE=Ethernet
DOMAIN="name.local"
Bridges :
Bred1:
DEVICE=bred1
TYPE=Bridge
BOOTPROTO=static
IPADDR="192.168.1.2"
NETMASK="255.255.255.0"
NETWORK="192.168.1.0"
PREFIX=24
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
Bred2:
DEVICE=bred2
TYPE=Bridge
BOOTPROTO=static
IPADDR="192.168.2.2"
NETMASK="255.255.255.0"
NETWORK="192.168.2.0"
PREFIX=24
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
Virtual Machines on eth0:
allow-hotplug eth0
interface eth inet static
address: 192.168.1.3
gw: 192.168.1.2
netmask: 255.255.255.0
network: 192.168.1.0
broadcast: 192.168.1.255
Virtual Machines on eth2:
allow-hotplug eth0
interface eth inet static
address: 192.168.2.3
gw: 192.168.2.2
netmask: 255.255.255.0
network: 192.168.2.0
broadcast: 192.168.2.255
Thanks a lot for your time. I appreciate it.
T.
Last edited:
