| CentOS 6 bridging problem. [message #46971] |
Tue, 26 June 2012 08:34 |
2young2die
Messages: 1
Registered: June 2012
Location: Poland
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Junior Member |
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Hi all.
I have currently an OpenVZ server:
uname -a
Linux vader8.superhost.pl 2.6.32-042stab055.16 #1 SMP Fri Jun 8
19:22:28 MSD 2012 x86_64 x86_64 x86_64 GNU/Linux
cat /etc/redhat-release
CentOS release 6.2 (Final)
lspci | grep -i eth
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
cd /etc/sysconfig/network-scripts
cat ifcfg-eth0
DEVICE="eth0"
BOOTPROTO=none
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
HWADDR=00:25:22:0D:C2:2A
DOMAIN=domain.eu
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
BRIDGE=vmbr0
cat ifcfg-eth0.20
DEVICE=eth0.20
BOOTPROTO=none
ONBOOT=yes
VLAN=yes
BRIDGE=vmbr20
cat ifcfg-vmbr20
DEVICE=vmbr20
BOOTPROTO=none
DHCPCLASS=
IPADDR=10.20.0.108
NETMASK=255.255.0.0
ONBOOT=yes
TYPE=Bridge
cat ifcfg-vmbr0
DEVICE=vmbr0
BOOTPROTO=none
DHCPCLASS=
IPADDR=195.218.152.219
NETMASK=255.255.255.0
ONBOOT=yes
TYPE=Bridge
cat ifcfg-vmbr0:1
DEVICE=vmbr0:1
BOOTPROTO=none
IPADDR=192.168.2.203
NETMASK=255.255.255.0
ONBOOT=yes
cat ifcfg-venet0
DEVICE=venet0
ONBOOT=yes
STARTMODE=onboot
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 vmbr0
195.218.152.0 0.0.0.0 255.255.255.0 U 0 0 0 vmbr0
10.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vmbr20
169.254.0.0 0.0.0.0 255.255.0.0 U 1003 0 0 vmbr0
169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 vmbr20
0.0.0.0 193.218.152.1 0.0.0.0 UG 0 0 0 vmbr0
iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ip route show
192.168.2.0/24 dev vmbr0 proto kernel scope link src 192.168.2.203
193.218.152.0/24 dev vmbr0 proto kernel scope link src 193.218.152.219
10.20.0.0/16 dev vmbr20 proto kernel scope link src 10.20.0.108
169.254.0.0/16 dev vmbr0 scope link metric 1003
169.254.0.0/16 dev vmbr20 scope link metric 1006
default via 193.218.152.1 dev vmbr0
ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UNKNOWN qlen 1000
link/ether 00:25:22:0d:c2:2a brd ff:ff:ff:ff:ff:ff
inet6 fe80::225:22ff:fe0d:c22a/64 scope link
valid_lft forever preferred_lft forever
3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN
link/ether 00:25:22:0d:c2:2a brd ff:ff:ff:ff:ff:ff
inet 193.218.152.219/24 brd 193.218.152.255 scope global vmbr0
inet 192.168.2.203/24 brd 192.168.2.255 scope global vmbr0:1
inet6 fe80::225:22ff:fe0d:c22a/64 scope link
valid_lft forever preferred_lft forever
4: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UNKNOWN
link/void
inet6 fe80::1/128 scope link
valid_lft forever preferred_lft forever
5: eth0.20@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP
link/ether 00:25:22:0d:c2:2a brd ff:ff:ff:ff:ff:ff
inet6 fe80::225:22ff:fe0d:c22a/64 scope link
valid_lft forever preferred_lft forever
6: vmbr20: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN
link/ether 00:25:22:0d:c2:2a brd ff:ff:ff:ff:ff:ff
inet 10.20.0.108/16 brd 10.20.255.255 scope global vmbr20
inet6 fe80::225:22ff:fe0d:c22a/64 scope link
valid_lft forever preferred_lft forever
tcpdump -n -i eth0 icmp and dst host 10.20.0.98
shows that there is no traffic on interface.
So I have a setup in which:
- eth0 is my physical interface
- it is bridged with vmbr0 with ip 195.218.152.219 and this address
is accessible across the network
- eth0.20 is a logical interface in VLAN 20 on eth0
- it is bridged with vmbr20 with ip 10.20.0.108 and this address IS
NOT accessible across the network
- vmbr0 bridge has an alias vmbr0:1 with ip 192.168.2.203 and this
address is accessible across the network
When I set up the network for testing:
- eth0 as a physical interface 195.218.152.219
- eth0.20 as a VLAN interface 10.20.0.108
both addresses are accessible across the network (VLANs on the switch
are set up correctly, VLAN 1 untagged, VLAN 20 tagged).
Do you see an error in my configuration? Why is 10.20.0.108 not available? Are there any known errors with OpenVZ kernel connected with vlan tagging?
Best regards,
Rafal.
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