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Re: [Xen-users] Bridging and VLANs 802.1Q trunk


  • To: "Timo Virtaneva" <timo@xxxxxxxxxxxx>
  • From: "Brian Wong" <bwlist@xxxxxxxxx>
  • Date: Thu, 9 Mar 2006 10:56:36 -0500
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx, Javier Guerra <javier@xxxxxxxxxxx>
  • Delivery-date: Thu, 09 Mar 2006 15:57:38 +0000
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On 3/8/06, Timo Virtaneva <timo@xxxxxxxxxxxx> wrote:
> Hi
>
> It does not work. You can get the VLAN tagging working with standard network 
> sripts. Greg has  made some good examples.
>
>
> http://lists.xensource.com/archives/html/xen-devel/2005-10/msg01174.html
> http://lists.xensource.com/archives/html/xen-devel/2006-01/msg00562.html
>
> However the traffic does not go through without the patch for the ethtool. I 
> hope that someone would put the modifications to standard package. I never 
> managed to create rpm-package with required modifications.
>
> -- Timo
>

How can I diagnose whether I am affected by either the MTU issue or
the ethtool checksum problem? Here is my 'ip addr' and 'brctl show'. I
still cant figure out why I have no connectivity. Is there something
obviously wrong with my config?

1: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
2: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0e:7f:25:8f:ae brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.42/8 brd 10.255.255.255 scope global eth1
3: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
4: vif0.0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
5: veth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether 00:0e:7f:25:8f:af brd ff:ff:ff:ff:ff:ff
    inet 172.16.8.80/24 brd 172.16.255.255 scope global veth0
6: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: vif0.4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
13: veth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
14: vif0.5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
15: veth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
16: vif0.6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
17: veth6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
18: vif0.7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
19: veth7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
20: eth0.8: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
21: xenbr8: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff

bridge name     bridge id               STP enabled     interfaces
xenbr8          8000.feffffffffff       no              eth0.8
                                                        vif0.0

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