thr3ads.net - Xen users - [Xen-users] e100 + Xen + VLAN -> VLANs don''t work? [Feb 2007]

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Tomasz Chmielewski

2007-Feb-02 11:49 UTC

[Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

I have a strange issue with trying to use VLANs on a server with e100 
cards (Intel Ethernet Pro 100).

After I start the "network-bridge" script, VLANs simply do not work
anymore:

dir=$(dirname "$0")

"$dir/network-bridge" "$@" vifnum=0 netdev=eth0
bridge=xenbr0
"$dir/network-bridge" "$@" vifnum=1 netdev=eth0.100
bridge=xenbr100
"$dir/network-bridge" "$@" vifnum=2 netdev=eth0.200
bridge=xenbr200


When I replace the card to the one using e1000 or tg3 driver, VLANs work 
correctly (however, I have more servers with e100 network interfaces 
onboard, where I''d like to use Xen).

Any clues on why VLANs don''t work anymore with Intel Ethernet Pro 100 
card when I start the "network-bridge" script?


-- 
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Daniele Palumbo

2007-Feb-02 12:02 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 12:49, Tomasz Chmielewski
wrote:> "$dir/network-bridge" "$@" vifnum=0 netdev=eth0
bridge=xenbr0
> "$dir/network-bridge" "$@" vifnum=1 netdev=eth0.100
bridge=xenbr100
> "$dir/network-bridge" "$@" vifnum=2 netdev=eth0.200
bridge=xenbr200
maybe you can check it manually:
set network script to false, and create manually the bridge.

one note:
as i posted before, to work correctly all the bridge in your config, you MUST 
have (renamed in square):

(p)eth0 -> xenbr0 -> eth0 (dom0)
                      \- vconfig add eth0 100 - (p)eth0.100 -> xenbr0.100
->
eth0.100 (dom0)
                      \- vconfig add eth0 100 - (p)eth0.100 -> xenbr0.200
->
eth0.200 (dom0)

this is a bridge bug (or feature).

bye
d.

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Javier Guerra

2007-Feb-02 12:05 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007, Tomasz Chmielewski wrote:> Any clues on why VLANs don''t work anymore with Intel Ethernet Pro
100
> card when I start the "network-bridge" script?
for VLANs it''s very convenient to use an MTU of 1504 on the ethx device
(and
1500 on the vlanxx devices).  but most 100mbit drivers don''t allow any
MTU of
more than 1500 (even if the cards themselves usually allow at least 1600).  
all Gb drivers i know allow for MTUs up to 9000

but i don''t know if your scripts try to setup the MTU to 1504... might
be
something else

-- 
Javier


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Tomasz Chmielewski

2007-Feb-02 12:15 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:> On Friday 02 February 2007 12:49, Tomasz Chmielewski wrote:
>> "$dir/network-bridge" "$@" vifnum=0 netdev=eth0
bridge=xenbr0
>> "$dir/network-bridge" "$@" vifnum=1 netdev=eth0.100
bridge=xenbr100
>> "$dir/network-bridge" "$@" vifnum=2 netdev=eth0.200
bridge=xenbr200
> 
> maybe you can check it manually:
> set network script to false, and create manually the bridge.
Hmm, how do I do it?


I noticed that VLANs won''t work with yet another 100 Mbit network card:
Realtek 8139 (8139too module).


e100 and 8139too have something MTU-related - setting MTU higher than 
1500 is impossible:

# ifconfig eth0 mtu 1501
SIOCSIFMTU: Invalid argument


With e1000 card, I can set a higher MTU without problems.


However, lowering MTU for eth0/VLANs doesn''t make any difference.


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Tomasz Chmielewski

2007-Feb-02 12:22 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Javier Guerra wrote:> On Friday 02 February 2007, Tomasz Chmielewski wrote:
>> Any clues on why VLANs don''t work anymore with Intel Ethernet
Pro 100
>> card when I start the "network-bridge" script?
> 
> for VLANs it''s very convenient to use an MTU of 1504 on the ethx
device (and
> 1500 on the vlanxx devices).  but most 100mbit drivers don''t allow
any MTU of
> more than 1500 (even if the cards themselves usually allow at least 1600).
> all Gb drivers i know allow for MTUs up to 9000
> 
> but i don''t know if your scripts try to setup the MTU to 1504...
might be
> something else
Yes, these 100 Mbit cards don''t support MTU higher than 1500 (I have 
this issue with Intel/e100 and Realtek/8139too cards; with 1 Gbit cards 
everything works flawlessly).

So I tried to setup VLANs (eth0.xxx) MTU to 1496, then to 1450, and it 
made no difference - still doesn''t work.


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Daniele Palumbo

2007-Feb-02 13:02 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 13:15, Tomasz Chmielewski
wrote:> > set network script to false, and create manually the bridge.
> Hmm, how do I do it?
move mac from eth0 to veth0,
set eth0 mac FF:FE:FF:FF:FF:FF (if i remeber correctly, check for peth0 mac)
ifconfig eth0 up
brctl addbr xenbr0
[brctl stp off, sethello 0, setfd 0, man brctl]
brctl addif xenbr0 eth0
brctl addif xenbr0 veth0 
ifconfig veth0 up
vconfig add veth0 100
vconfig add veth0 200
ifconfig veth0.100 up
ifconfig veth0.200 up
[return to brctl, use your imagination]
> e100 and 8139too have something MTU-related - setting MTU higher than
> 1500 is impossible:
> # ifconfig eth0 mtu 1501
> SIOCSIFMTU: Invalid argument
this can be normal, check if the driver support jumbo frame.
> With e1000 card, I can set a higher MTU without problems.
for sure, e1000 support jumbo frame.
> However, lowering MTU for eth0/VLANs doesn''t make any difference.
that is not the right way.

uh, you can check also for "tx checksumming" (list are full of this).

bye
d.

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Tomasz Chmielewski

2007-Feb-02 13:13 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:

(...)
>> However, lowering MTU for eth0/VLANs doesn''t make any
difference.
> 
> that is not the right way.
> 
> uh, you can check also for "tx checksumming" (list are full of
this).
It was rather about disabling tx checksumming for domU domains.
And at least pings went through; in my case, even a smallest ping (-s 
100 or so) will not get through.

But disabling it here for dom0 also makes no difference - still, on two 
different 100 Mbit cards I tried (Intel e100 and Realtek 8139), VLANs 
don''t work with Xen (and work perfectly fine with 1 Gbit cards).

-- 
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Timo Benk

2007-Feb-02 14:02 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Tomasz Chmielewski wrote:> But disabling it here for dom0 also makes no difference - still, on two
> different 100 Mbit cards I tried (Intel e100 and Realtek 8139), VLANs
> don''t work with Xen (and work perfectly fine with 1 Gbit cards).the following setup works prefectly for me:

            peth0
          ----|-----
         | peth0.10 |
         | vif0.0   |
         | vif1.0   |----Domain-U
          ----------

Domain-0 # ip l s peth0 mtu 1496

Domain-U # ip l s eth0 mtu 1496

Greetings,
-timo
-- 
Timo Benk - Jabber ID: fry@downtempo.de - ICQ ID: #414944731
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Timo Benk

2007-Feb-02 14:12 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Timo Benk wrote:> Tomasz Chmielewski wrote:
>> But disabling it here for dom0 also makes no difference - still, on two
>> different 100 Mbit cards I tried (Intel e100 and Realtek 8139), VLANs
>> don''t work with Xen (and work perfectly fine with 1 Gbit
cards).
> the following setup works prefectly for me:
> 
>             peth0
>           ----|-----
>          | peth0.10 |
>          | vif0.0   |
>          | vif1.0   |----Domain-U
>           ----------
> 
> Domain-0 # ip l s peth0 mtu 1496
> 
> Domain-U # ip l s eth0 mtu 1496
> 
> Greetings,
> -timoSorry, my mistake:

             peth0
           ----|-----
          | peth0.10 |
          | vif0.0   |
          | vif1.0   |----Domain-U
           ----------

Domain-0 # ip l s eth0 mtu 1496
                  ^^^^
Domain-U # ip l s eth0 mtu 1496

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Tomasz Chmielewski

2007-Feb-02 14:35 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Timo Benk wrote:

(...)
> Sorry, my mistake:
> 
>              peth0
>            ----|-----
>           | peth0.10 |
>           | vif0.0   |
>           | vif1.0   |----Domain-U
>            ----------
> 
> Domain-0 # ip l s eth0 mtu 1496
>                   ^^^^
> Domain-U # ip l s eth0 mtu 1496
1) do you have a 100 Mbit network card? if so, which one?

2) could you paste the scripts you use to start the bridge (if you
don''t
use the standard scripts provided with Xen or made some changes)?


Still, it does not work for me.


-- 
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Timo Benk

2007-Feb-02 14:46 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Tomasz Chmielewski wrote:> Timo Benk wrote:
> 
> (...)
> 
>> Sorry, my mistake:
>>
>>              peth0
>>            ----|-----
>>           | peth0.10 |
>>           | vif0.0   |
>>           | vif1.0   |----Domain-U
>>            ----------
>>
>> Domain-0 # ip l s eth0 mtu 1496
>>                   ^^^^
>> Domain-U # ip l s eth0 mtu 1496
> 
> 1) do you have a 100 Mbit network card? if so, which one?
> 
> 2) could you paste the scripts you use to start the bridge (if you
don''t
> use the standard scripts provided with Xen or made some changes)?
> 
> 
> Still, it does not work for me.Network card:
03:08.0 Ethernet controller: Intel Corporation 82562EZ 10/100 Ethernet
Controller (rev 02)

Module:
e100

Script:

#/bin/bash

brctl delif xenbr0 peth0
brctl delif xenbr0 vif0.0

ip l s xenbr0 down
brctl delbr xenbr0

brctl addbr vlan10
brctl addbr vlan20
brctl addbr vlan30
ip l s vlan10 up
ip l s vlan20 up
ip l s vlan30 up

modprobe 8021q
vconfig add peth0 10
vconfig add peth0 20
vconfig add peth0 30
ip l s peth0.10 up
ip l s peth0.20 up
ip l s peth0.30 up

brctl addif vlan10 peth0.10
brctl addif vlan10 vif0.0

ip l s eth0 mtu 1496


Additionally, it is necessary for me to set the MTU inside the Domain-U to
1496.

xendom1~ # ip l s eth0 mtu 1492

Greetings,
-timo
-- 
Timo Benk - Jabber ID: fry@downtempo.de - ICQ ID: #414944731
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Tomasz Chmielewski

2007-Feb-02 15:04 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Timo Benk wrote:

(...)
> Script:
> 
> #/bin/bash
> 
> brctl delif xenbr0 peth0
> brctl delif xenbr0 vif0.0
> 
> ip l s xenbr0 down
> brctl delbr xenbr0
> 
> brctl addbr vlan10
> brctl addbr vlan20
> brctl addbr vlan30
> ip l s vlan10 up
> ip l s vlan20 up
> ip l s vlan30 up
> 
> modprobe 8021q
> vconfig add peth0 10
> vconfig add peth0 20
> vconfig add peth0 30
> ip l s peth0.10 up
> ip l s peth0.20 up
> ip l s peth0.30 up
> 
> brctl addif vlan10 peth0.10
> brctl addif vlan10 vif0.0
> 
> ip l s eth0 mtu 1496
Hmm, you sure you didn''t change anything / pasted the whole script?

# /etc/init.d/xend start   # (empty network-script)
# bash -x script.vlans
+ brctl delif xenbr0 peth0
interface peth0 does not exist!
+ brctl delif xenbr0 vif0.0
interface vif0.0 does not exist!
+ ip l s xenbr0 down
SIOCGIFFLAGS: No such device
+ brctl delbr xenbr0
bridge xenbr0 doesn''t exist; can''t delete it
+ brctl addbr vlan10
+ brctl addbr vlan20
+ brctl addbr vlan30
+ ip l s vlan10 up
+ ip l s vlan20 up
+ ip l s vlan30 up
+ modprobe 8021q
+ vconfig add peth0 10
ERROR: trying to add VLAN #10 to IF -:peth0:-  error: Invalid argument
+ vconfig add peth0 20
ERROR: trying to add VLAN #20 to IF -:peth0:-  error: Invalid argument
+ vconfig add peth0 30
ERROR: trying to add VLAN #30 to IF -:peth0:-  error: Invalid argument
+ ip l s peth0.10 up
SIOCGIFFLAGS: No such device
+ ip l s peth0.20 up
SIOCGIFFLAGS: No such device
+ ip l s peth0.30 up
SIOCGIFFLAGS: No such device
+ brctl addif vlan10 peth0.10
interface peth0.10 does not exist!
+ brctl addif vlan10 vif0.0
+ ip l s eth0 mtu 1496


> Additionally, it is necessary for me to set the MTU inside the Domain-U to
> 1496.
> 
> xendom1~ # ip l s eth0 mtu 1492
Question: do you set up VLANs in domU as well? I hope not, this is a 
wrong approach to VLANs.


-- 
Tomasz Chmielewski
http://wpkg.org





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Daniele Palumbo

2007-Feb-02 15:09 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 15:46, Timo Benk wrote:> Additionally, it is necessary for me to set the MTU inside the Domain-U to
> 1496.
with tg3, bnx2, 3c59x is not necessary.
i think that it is not necessary at all, if you use xen > 3.0.2.
in 3.0.2 there was an upper limit in MTU, in both front and back driver.

there is also a patch (find my post).
BTW, changing MTU to 1492 is not IMHO a good way to workaround.

bye
d.

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Timo Benk

2007-Feb-02 15:11 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:> On Friday 02 February 2007 15:46, Timo Benk wrote:
>> Additionally, it is necessary for me to set the MTU inside the Domain-U
to
>> 1496.
> 
> with tg3, bnx2, 3c59x is not necessary.
> i think that it is not necessary at all, if you use xen > 3.0.2.
> in 3.0.2 there was an upper limit in MTU, in both front and back driver.Hm, i am using 3.0.4-1 and for me it is still necessary.
> BTW, changing MTU to 1492 is not IMHO a good way to workaround.Why?

Greetings,
-timo

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Timo Benk

2007-Feb-02 15:12 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Tomasz Chmielewski wrote:> Timo Benk wrote:
> 
> (...)
> 
>> Script:
>>
>> #/bin/bash
>>
>> brctl delif xenbr0 peth0
>> brctl delif xenbr0 vif0.0
>>
>> ip l s xenbr0 down
>> brctl delbr xenbr0
>>
>> brctl addbr vlan10
>> brctl addbr vlan20
>> brctl addbr vlan30
>> ip l s vlan10 up
>> ip l s vlan20 up
>> ip l s vlan30 up
>>
>> modprobe 8021q
>> vconfig add peth0 10
>> vconfig add peth0 20
>> vconfig add peth0 30
>> ip l s peth0.10 up
>> ip l s peth0.20 up
>> ip l s peth0.30 up
>>
>> brctl addif vlan10 peth0.10
>> brctl addif vlan10 vif0.0
>>
>> ip l s eth0 mtu 1496
> 
> Hmm, you sure you didn''t change anything / pasted the whole
script?
> 
> # /etc/init.d/xend start   # (empty network-script)
> # bash -x script.vlans
> + brctl delif xenbr0 peth0
> interface peth0 does not exist!
> + brctl delif xenbr0 vif0.0
> interface vif0.0 does not exist!
> + ip l s xenbr0 down
> SIOCGIFFLAGS: No such device
Of course this script assumes that there is already a bridge set up
inside Domain-0, Default bridge xenbr0 with two interfaces vif0.0 and
peth0. That explains the errors.
> Question: do you set up VLANs in domU as well? I hope not, this is a
> wrong approach to VLANs.No vlan setup inside the domSs. Just the MTU was changed in the
Domains.

Greetings,
-timo
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Tomasz Chmielewski

2007-Feb-02 15:13 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:> On Friday 02 February 2007 15:46, Timo Benk wrote:
>> Additionally, it is necessary for me to set the MTU inside the Domain-U
to
>> 1496.
> 
> with tg3, bnx2, 3c59x is not necessary.
> i think that it is not necessary at all, if you use xen > 3.0.2.
> in 3.0.2 there was an upper limit in MTU, in both front and back driver.
I use Xen 3.0.4.

> there is also a patch (find my post).
> BTW, changing MTU to 1492 is not IMHO a good way to workaround.
Which doesn''t work for me on 100 Mbit cards (1 Gbit cards
don''t need any
workarounds).

Which leads me to a question: those for whom VLANs work with 100 Mbit 
cards - do you set it up in dom0, or in domU?
Setting up a VLAN in domU is a wrong approach.

VLANs should be configured only in dom0, and should work transparently 
for domUs (which works for me with 1 Gbit cards, but not with 100 Mbit 
cards).


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Daniele Palumbo

2007-Feb-02 15:14 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 16:04, Tomasz Chmielewski
wrote:> + vconfig add peth0 10
> ERROR: trying to add VLAN #10 to IF -:peth0:-  error: Invalid argument
> + vconfig add peth0 20
> ERROR: trying to add VLAN #20 to IF -:peth0:-  error: Invalid argument
> + vconfig add peth0 30
> ERROR: trying to add VLAN #30 to IF -:peth0:-  error: Invalid argument
> + ip l s peth0.10 up
i will repeat it.
if you add a vlan to peth0 (whole interface), the bridge xenbr0 (whole 
interface) will stop working.
at least, it does for me.

if it works for you, please let me know.

bye
d.

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Timo Benk

2007-Feb-02 15:20 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:> On Friday 02 February 2007 16:04, Tomasz Chmielewski wrote:
>> + vconfig add peth0 10
>> ERROR: trying to add VLAN #10 to IF -:peth0:-  error: Invalid argument
>> + vconfig add peth0 20
>> ERROR: trying to add VLAN #20 to IF -:peth0:-  error: Invalid argument
>> + vconfig add peth0 30
>> ERROR: trying to add VLAN #30 to IF -:peth0:-  error: Invalid argument
>> + ip l s peth0.10 up
> 
> i will repeat it.
> if you add a vlan to peth0 (whole interface), the bridge xenbr0 (whole 
> interface) will stop working.
> at least, it does for me.
Yes, for sure. Seems for me that you did not have a peth0 Interface.

Configure the default bridged setup and try the script again.

If it is still not working for you, i cannot help you any more.

Anything i can say is, the described setup works for me.

Greetings,
-timo
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Daniele Palumbo

2007-Feb-02 15:20 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 16:11, Timo Benk wrote:> > in 3.0.2 there was an upper limit in MTU, in both front and back
driver.
> Hm, i am using 3.0.4-1 and for me it is still necessary.
strange.
maybe you have a driver limit in e100, but it should not be as long as it 
support vlans.
> > BTW, changing MTU to 1492 is not IMHO a good way to workaround.
> Why?
well, your switch (apart from some switch) suppose that you have 1500 byte of 
mtu.
and all machine in your lan suppose it.
you will have fragmentation your packet, if you are luckie, and maybe 
sometimes you will lose big packets (at least, i did).

ok, that should not be in theory, but in real world it is something like 
weird.

bye
d.

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Daniele Palumbo

2007-Feb-02 15:24 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

On Friday 02 February 2007 16:13, Tomasz Chmielewski
wrote:> Which leads me to a question: those for whom VLANs work with 100 Mbit
> cards
maybe you can ask it to xen-devel.
but i guess that they will say "hey, do you still use 100 mbit
network?" (i
must say that i will never use a 100 mbit in producion, you can buy for 20$ 
an e1000 on ebay...)
> do you set it up in dom0, or in domU? 
both (see below).
> Setting up a VLAN in domU is a wrong approach.
i agree, except for some applications.
we have 4 labs, and we must configure some machine with an ip on all the labs 
(they are on different network).

that are trusted machine, so it is a good way to setup it directly in domU.

but generally speaking, yes, it is bad.

bye
d.

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Tomasz Chmielewski

2007-Feb-02 15:39 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Daniele Palumbo wrote:> On Friday 02 February 2007 16:13, Tomasz Chmielewski wrote:
>> Which leads me to a question: those for whom VLANs work with 100 Mbit
>> cards
> 
> maybe you can ask it to xen-devel.
> but i guess that they will say "hey, do you still use 100 mbit
network?" (i
> must say that i will never use a 100 mbit in producion, you can buy for 20$
> an e1000 on ebay...)
We run our Xen servers and backup Xen servers on 1 Gbit network.

All data is stored on NAS/SAN devices.

If all Xen servers and Xen backup servers fail, we want to be able to 
start a "second backup servers", booted off a tftp.
So a Xen server cat be booted off pxe/tftp on any machine with a network 
card and enough RAM, but I noticed, that VLANs don''t work on machines 
with 100 Mbit cards.

Which is strange to me, as VLANs goes in pair with virtualization.

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Thomas von Steiger

2007-Feb-02 19:35 UTC

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AW: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

I think your network adapter has no support for IEEE 802.1Q VLAN Tagging
You need a network adapter with IEEE 802.1Q VLAN Tagging support

Thomas

-----Ursprüngliche Nachricht-----
Von: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] Im Auftrag von Tomasz
Chmielewski
Gesendet: Freitag, 2. Februar 2007 13:22
An: Javier Guerra
Cc: xen-users@lists.xensource.com
Betreff: Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Javier Guerra wrote:> On Friday 02 February 2007, Tomasz Chmielewski wrote:
>> Any clues on why VLANs don''t work anymore with Intel Ethernet
Pro 100
>> card when I start the "network-bridge" script?
> 
> for VLANs it''s very convenient to use an MTU of 1504 on the ethx
device
(and > 1500 on the vlanxx devices).  but most 100mbit drivers don''t allow
any MTU
of > more than 1500 (even if the cards themselves usually allow at least 1600).
> all Gb drivers i know allow for MTUs up to 9000
> 
> but i don''t know if your scripts try to setup the MTU to 1504...
might be
> something else
Yes, these 100 Mbit cards don''t support MTU higher than 1500 (I have 
this issue with Intel/e100 and Realtek/8139too cards; with 1 Gbit cards 
everything works flawlessly).

So I tried to setup VLANs (eth0.xxx) MTU to 1496, then to 1450, and it 
made no difference - still doesn''t work.


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Tomasz Chmielewski

2007-Feb-02 19:49 UTC

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Re: AW: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Thomas von Steiger wrote:> I think your network adapter has no support for IEEE 802.1Q VLAN Tagging
> You need a network adapter with IEEE 802.1Q VLAN Tagging support
It has. Intel Ethernet Pro 100 (e100) and Realtek 8139 (8139too) support 
VLAN.

VLANs work fine when I have 100 Mbit card as long as I don''t start 
"network-bridge" script.

When I have a 1 Gbit card, VLANs works fine before and after starting 
"network-bridge" script (same system, same hardware, only network
cards
changed).


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Tomasz Chmielewski

2007-Feb-07 15:16 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work [SOLVED]?

Timo Benk wrote:

(...)
>> if you add a vlan to peth0 (whole interface), the bridge xenbr0 (whole 
>> interface) will stop working.
>> at least, it does for me.
> 
> Yes, for sure. Seems for me that you did not have a peth0 Interface.
> 
> Configure the default bridged setup and try the script again.
> 
> If it is still not working for you, i cannot help you any more.
> 
> Anything i can say is, the described setup works for me.
All right, finally I found where the problem is.

In the end, it looks like your scripts do pretty much the same what the 
default Xen "network-bridge" script does.

VLANs work for me on 100 Mbit cards if I *only* use VLAN-tagged 
interfaces for Xen networking (these scripts achieve more or less what 
your scripts):

network-bridge start vifnum=1 netdev=eth0.100 bridge=xenbr100

network-bridge start vifnum=2 netdev=eth0.200 bridge=xenbr200

network-bridge start vifnum=3 netdev=eth0.300 bridge=xenbr300


However, I want to use normal, non-tagged networking, too:

network-bridge start vifnum=0 netdev=eth0 bridge=xenbr0


After starting the bridge for eth0/xenbr0, VLANs don''t work anymore.

With 1 Gbit cards, I don''t have this problem, and I can use a bridge 
with eth0.


To sum up - I could:

1) 100 Mbit cards + Xen - simultaneously:

- can use domains with VLANs
- can not use domains without VLANs

or:

- can not use domains with VLANs
- can use domains without VLANs


2) 1 Gbit cards + Xen

- can use both VLAN and non-VLAN networking with guest domains


The solution was:

* Do not start a bridge (like xenbr0) for eth0:

#network-bridge start vifnum=0 netdev=eth0 bridge=xenbr0


* Do *not* specify a bridge in configuration of domains that don''t use 
VLANs:

- this one works:

vif    = [ ''ip=192.168.151.21, mac=00:16:3E:5B:19:14'' ]


- this one will fail:

vif    = [ ''ip=192.168.151.21, mac=00:16:3E:5B:19:14'',
bridge=''xenbr0'' ]



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Tomasz Chmielewski

2007-Feb-07 16:22 UTC

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Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work [SOLVED]?

Tomasz Chmielewski wrote:

Correction, this still applies:
> To sum up - I could:
> 
> 1) 100 Mbit cards + Xen - simultaneously:
> 
> - can use domains with VLANs
> - can not use domains without VLANs
> 
> or:
> 
> - can not use domains with VLANs
> - can use domains without VLANs
> 
> 
> 2) 1 Gbit cards + Xen
> 
> - can use both VLAN and non-VLAN networking with guest domains

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Xen users - Feb 2007 - e100 + Xen + VLAN -> VLANs don''t work?

[Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

AW: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: AW: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work [SOLVED]?

Re: [Xen-users] e100 + Xen + VLAN -> VLANs don''t work [SOLVED]?