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VLAN Setup [message #15653]

Thu, 09 August 2007 06:07

jonasb
Messages: 20
Registered: July 2007

Junior Member

My server are connected to a switch with cisco trunking.
I have 2 VLANs. How can I create VEs in both VLANs?

[Updated on: Fri, 25 January 2008 08:11]

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Re: VLAN Setup [message #15654 is a reply to message #15653]

Thu, 09 August 2007 07:33

vaverin
Messages: 708
Registered: September 2005

Senior Member

Hi Jonas,

I hope the following link will help you:
http://wiki.openvz.org/VLAN

Please fell free to ask me if you have some questions.

thank you,
Vasily Averin

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Re: VLAN Setup [message #15659 is a reply to message #15654]

Thu, 09 August 2007 08:09

jonasb
Messages: 20
Registered: July 2007

Junior Member

Thanks! I have seen that before. Is it possible to not using VLAN inside the VE? Just using vconfig outside the VE.

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Re: VLAN Setup [message #15660 is a reply to message #15659]

Thu, 09 August 2007 08:14

vaverin
Messages: 708
Registered: September 2005

Senior Member

Of course, just use "vconfig add eth0 <vlan_id>" on HW node.

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Re: VLAN Setup [message #15663 is a reply to message #15660]

Thu, 09 August 2007 08:57

jonasb
Messages: 20
Registered: July 2007

Junior Member

I can't get it to work. Sad

I can start the VE. And I can ping it from HN but not outside HN. The strange thing is that my vlan disappear when I start the VE. And is availiable again when I stop it.

[root@vz-test ~]# uname -a
Linux vz-test 2.6.18-8.1.8.el5.028stab039.1PAE #1 SMP Mon Jul 23 20:45:26 MSD 2007 i686 i686 i386 GNU/Linux

[root@vz-test ~]# vconfig add eth1 105
Added VLAN with VID == 105 to IF -:eth1:-

[root@vz-test ~]# ifconfig eth1.105 192.168.20.137 netmask 255.255.255.240 broadcast 192.168.20.143

[root@vz-test ~]# vzctl set 10666 --netdev_add eth1.105 --save
Saved parameters for VE 10666

[root@vz-test ~]# vzctl set 10666 --ipadd 192.168.20.138 --save
Saved parameters for VE 10666

[root@vz-test ~]# ifconfig eth1.105
eth1.105 Link encap:Ethernet HWaddr 00:30:48:60:71:9D
inet addr:192.168.20.137 Bcast:192.168.20.143 Mask:255.255.255.240
inet6 addr: fe80::230:48ff:fe60:719d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:30 errors:0 dropped:0 overruns:0 frame:0
TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1538 (1.5 KiB) TX bytes:1596 (1.5 KiB)

[root@vz-test ~]# vzctl start 10666
Starting VE ...
VE is mounted
Adding IP address(es): 192.168.20.138
arpsend: 192.168.20.138 is detected on another computer : 00:00:0c:07:ac:01
vps-net_add WARNING: arpsend -c 1 -w 1 -D -e 192.168.20.138 eth1.106 FAILED
arpsend: 192.168.20.138 is detected on another computer : 00:1a:6d:02:43:45
vps-net_add WARNING: arpsend -c 1 -w 1 -D -e 192.168.20.138 eth1.104 FAILED
Setting CPU units: 1000
Setting CPUs: 1
Configure meminfo: 768000
File resolv.conf was modified
VE start in progress...

[root@vz-test ~]# ping -c 1 192.168.20.138
PING 1192.168.20.138 (1192.168.20.138) 56(84) bytes of data.
64 bytes from 192.168.20.138: icmp_seq=1 ttl=64 time=0.075 ms

--- 1192.168.20.138 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.075/0.075/0.075/0.000 ms

[root@vz-test ~]# ifconfig eth1.105
eth1.105: error fetching interface information: Device not found

[root@vz-test ~]# cat /proc/net/vlan/config
VLAN Dev name | VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
eth1.106 | 106 | eth1
eth1.104 | 104 | eth1

[root@vz-test ~]# ifconfig eth1.105
eth1.105: error fetching interface information: Device not found

[root@vz-test ~]# vzctl stop 10666
Stopping VE ...
VE was stopped
VE is unmounted

[root@vz-test ~]# ifconfig eth1.105
eth1.105 Link encap:Ethernet HWaddr 00:30:48:60:71:9D
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:30 errors:0 dropped:0 overruns:0 frame:0
TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1538 (1.5 KiB) TX bytes:1428 (1.3 KiB)

[root@vz-test ~]# cat /proc/net/vlan/config
VLAN Dev name | VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
eth1.106 | 106 | eth1
eth1.104 | 104 | eth1
eth1.105 | 105 | eth1

[Updated on: Thu, 09 August 2007 08:58]

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Re: VLAN Setup [message #15664 is a reply to message #15663]

Thu, 09 August 2007 09:51

vaverin
Messages: 708
Registered: September 2005

Senior Member

As far as I understand you want to use several VE with vlan's IP without any vlan configurations inside VEs. Am I correct?

jonasb wrote on Thu, 09 August 2007 12:57

I can't get it to work. Sad

here you have configured vlan vid 105 on HW node. OK

jonasb wrote on Thu, 09 August 2007 12:57

[root@vz-test ~]# vzctl set 10666 --netdev_add eth1.105 --save
Saved parameters for VE 10666

This is wrong, you should not move this device into VE, it's extra task for your purposes.

jonasb wrote on Thu, 09 August 2007 12:57

[root@vz-test ~]# vzctl set 10666 --ipadd 192.168.20.138 --save
Saved parameters for VE 10666

This is wrong again: 192.168.20.138 is already used. You should use any non-used IP for your VEs.

Thank you,
Vasily Averin

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Re: VLAN Setup [message #15666 is a reply to message #15664]

Thu, 09 August 2007 10:45

jonasb
Messages: 20
Registered: July 2007

Junior Member

vaverin wrote on Thu, 09 August 2007 05:51

As far as I understand you want to use several VE with vlan's IP without any vlan configurations inside VEs. Am I correct?

Correct!

vaverin wrote on Thu, 09 August 2007 05:51

jonasb wrote on Thu, 09 August 2007 12:57

I can't get it to work. Sad

here you have configured vlan vid 105 on HW node. OK

jonasb wrote on Thu, 09 August 2007 12:57

[root@vz-test ~]# vzctl set 10666 --netdev_add eth1.105 --save
Saved parameters for VE 10666

This is wrong, you should not move this device into VE, it's extra task for your purposes.

OK, so I don't use --netdev_add at all?

vaverin wrote on Thu, 09 August 2007 05:51

jonasb wrote on Thu, 09 August 2007 12:57

[root@vz-test ~]# vzctl set 10666 --ipadd 192.168.20.138 --save
Saved parameters for VE 10666

This is wrong again: 192.168.20.138 is already used. You should use any non-used IP for your VEs.

It doesn't matter which IP-address I use I always got errormessages that they are in use. Im really sure that I don't use them anywhere else.

[Updated on: Thu, 09 August 2007 10:46]

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Re: VLAN Setup [message #15668 is a reply to message #15666]

Thu, 09 August 2007 11:09

vaverin
Messages: 708
Registered: September 2005

Senior Member

jonasb wrote on Thu, 09 August 2007 14:45

OK, so I don't use --netdev_add at all?

exactly, you should only assign non-used IP for your VE

jonasb wrote on Thu, 09 August 2007 14:45

It doesn't matter which IP-address I use I always got errormessages that they are in use. Im really sure that I don't use them anywhere else.

Hmm, it looks strange. you need to understand where is interface with MAC addresses 00:00:0c:07:ac:01 and 00:1a:6d:02:43:45
Could you show "arp -an" output on HW node?
Or probably you can send me access credential via PM -- I'll try to investigate this issue on your node.

Thank you,
Vasily Averin

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Re: VLAN Setup [message #15762 is a reply to message #15668]

Sat, 11 August 2007 05:48

jonasb
Messages: 20
Registered: July 2007

Junior Member

It worked a little better with source based routing, http://wiki.openvz.org/Source_based_routing

The problem with warnings about IP already in used is still there. Sad

After a couple of hours (3-5 hours) it stops working.
If I restart the VE or if remove and add source based routing it begin to work again.

ip route, ip address, ip rule is the same all the time.

Does anyone have a clue?

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Re: VLAN Setup [message #15797 is a reply to message #15762]

Mon, 13 August 2007 19:46

jonasb
Messages: 20
Registered: July 2007

Junior Member

This is now solved. Andrey@SWSoft helped me out.
The problem was when the router cleaned up the arp cache the arp for the VE was removed.
I had to add an extra "ip rule" and after that it worked. Razz

/sbin/ip rule add from 192.168.20.128/28 table 90
/sbin/ip rule add to 192.168.20.128/28 lookup main pref 90
/sbin/ip route add default dev eth1.10 via 192.168.20.130 table 90

[Updated on: Mon, 13 August 2007 19:47]

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Re: VLAN Setup [message #26504 is a reply to message #15653]

Fri, 25 January 2008 08:17

jonasb
Messages: 20
Registered: July 2007

Junior Member

This is not solved yet. Sad

I use the following solution to get several VLANs to work on the same HN.
It works.

echo 1 > /proc/sys/net/ipv4/conf/eth1.100/proxy_arp
echo 0 > /proc/sys/net/ipv4/conf/eth1.100/rp_filter

But when you have 2 (or more) HNs in the VLAN you have problem.

Since I disabled rp_filter and enabled proxy_arp both HNs try to answear the icoming ARP reqeust.

And the HN who can aswear fastest will be arp cached in the router.

So if the wrong HN answear that MAC address will be used in the router and the packets will not get through.

When I manually delete the ARP antry and add the right one it works.

Any ides how to solve this? There must be some way to get real VLAN support in OpenVZ.

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Re: VLAN Setup [message #26580 is a reply to message #15653]

Mon, 28 January 2008 20:58

jonasb
Messages: 20
Registered: July 2007

Junior Member

Any ideas? Should I make a bug report?

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