mpls-linux-general — Mailing list for general discussion about MPLS for Linux

[mpls-linux-general] MPLS and 802.11e

[<luc...@li...>]

Hello, I'm still working with MPLS over WiFi.
I'm trying to enable wireless QoS 
extensions (802.11e) together with MPLS, but it seems not to succeed in 
classifying the flows once they are encapsulated in MPLS.
I try to explain: 
802.11e does a matching between the DSCP field of IP header and a class (Access 
Category) .
When I send a flow with MPLS, if I sniff the traffic with wireshark 
I can see the DSCP field correctly written, but the wireless QoS information do 
not match with the right class.
Otherwise, if I send the same flow without 
MPLS, everything works fine.
I'd like to understand why, can anybody help me?

Thanks a lot,
Luca

Re: [mpls-linux-general] Test IPv6 forwarding problem

[<tr...@ya...>]

Thank you first.

--- 08/6/4 (星期三)，James R. Leu <jl...@mi...> 寫道：

> 寄件者: James R. Leu <jl...@mi...>
> 主旨: Re: [mpls-linux-general] Test IPv6 forwarding problem
> 收件者: tr...@ya...
> 副本: mpl...@li...
> 日期: 2008 6 4 星期三 上午 9:54
> Hello,
> 
> On Wed, Jun 04, 2008 at 09:46:55AM +0800,
> tr...@ya... wrote:
> > Hello there,
> > 
> > I try to add nhlfe for eth0 which using this command.
> > 
> > # mpls nhlfe add key 0 instructions push gen 1001
> nexthop eth0 ipv6 3ffe:b00:3::1
> > 
> > NHLFE entry key 0x0000003d mtu 0 propagate_ttl
> >          (0 bytes, 0 pkts)
> > 
> > 
> > Then I use "mpls nhlfe show" command to
> check the configuration. 
> > 
> > # mpls nhlfe show
> > 
> > NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
> >         push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0
> bytes, 0 pkts)
> > 
> > 
> > but, the ipv6 address of nexthop is incorrect.
> > Please let me know if I am missing any step or any
> thing is incorrect.
> 
> I've had people attempt to map IPv6 onto a LSP, but I
> do not recall
> anyone trying to build the LSP with IPv6 nexthop addresses,
> so I think
> your in uncharted territory.
> 
> I'm surprised it got as far as it did.  I'm
> wondering if there is just
> a display error in the 'mpls' code.  I'm a
> total noob when it comes to
> IPv6.  If you can provide a quick set of steps I can use to
> reproduce
> this I will try to fix it.
> 

My testbed is as follows:

(pc 2)------(LER 2)--------(LER 1)--------(pc 1)
　eth0　　eth1　eth0　　　eth0　eth1　　eth0

PC 1
------
ifconfig eth0 inet6 add 3ffe:b00:1::1/48

LER 1
------
ifconfig eth0 inet6 add 3ffe:b00:3::1/48
ifconfig eth1 inet6 add 3ffe:b00:1::2/48
echo "1" >/proc/sys/net/ipv6/conf/all/forwarding
mpls nhlfe add key 0 instructions push gen 1001 nexthop eth0 ipv6 3ffe:b00:3::2
(returns key 0x3d)
ip route add 3ffe:b00:6::/48 via 3ffe:b00:3::2 mpls 0x3d

mpls labelspace set dev eth0 labelspace 0
mpls ilm add label gen 2001 labelspace 0


LER 2
------
ifconfig eth0 inet6 add 3ffe:b00:3::2/48
ifconfig eth1 inet6 add 3ffe:b00:6::2/48
echo "1" >/proc/sys/net/ipv6/conf/all/forwarding
mpls nhlfe add key 0 instructions push gen 2001 nexthop eth0 ipv6 3ffe:b00:3::1
(returns key 0x3)
ip route add 3ffe:b00:1::/48 via 3ffe:b00:3::1 mpls 0x3

mpls labelspace set dev eth0 labelspace 0
mpls ilm add label gen 1001 labelspace 0

PC 2
------
ifconfig eth0 inet6 add 3ffe:b00:6::1/48



Test LER 1
------
Try again and look the nexthop of nhlfe after each command.

# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:8b02:0:38a1:3408  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:8b02:0:38a1:3408  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:c310:d08:da10:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:c310:d08:da10:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)
# mpls nhlfe show
NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3:0:fb11:d08:fb11:d08  (0 bytes, 0 pkts)


I had tried "IPv4 over MPLS: two LER example for mpls-linux-1.95x", but I really don't understand what's the IPv6 problem.

Thank you very much


> > 
> > Thanks & Regards.
> > 
> > 
> >      
> ______________________________________________________________________________________________________
> >
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> > 
> 
> >
> -------------------------------------------------------------------------
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> > mpl...@li...
> >
> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general
> 
> 
> -- 
> James R. Leu
> jl...@mi...


      ______________________________________________________________________________________________________
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Re: [mpls-linux-general] Test IPv6 forwarding problem

[James R. L. <jl...@mi...>]

Hello,

On Wed, Jun 04, 2008 at 09:46:55AM +0800, tr...@ya... wrote:
> Hello there,
> 
> I try to add nhlfe for eth0 which using this command.
> 
> # mpls nhlfe add key 0 instructions push gen 1001 nexthop eth0 ipv6 3ffe:b00:3::1
> 
> NHLFE entry key 0x0000003d mtu 0 propagate_ttl
>          (0 bytes, 0 pkts)
> 
> 
> Then I use "mpls nhlfe show" command to check the configuration. 
> 
> # mpls nhlfe show
> 
> NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
>         push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0 bytes, 0 pkts)
> 
> 
> but, the ipv6 address of nexthop is incorrect.
> Please let me know if I am missing any step or any thing is incorrect.

I've had people attempt to map IPv6 onto a LSP, but I do not recall
anyone trying to build the LSP with IPv6 nexthop addresses, so I think
your in uncharted territory.

I'm surprised it got as far as it did.  I'm wondering if there is just
a display error in the 'mpls' code.  I'm a total noob when it comes to
IPv6.  If you can provide a quick set of steps I can use to reproduce
this I will try to fix it.

> 
> Thanks & Regards.
> 
> 
>       ______________________________________________________________________________________________________
> 付費才容量無上限？Yahoo!奇摩電子信箱2.0免費給你，信件永遠不必刪！ http://tw.mg0.mail.yahoo.com/dc/landing
> 

> -------------------------------------------------------------------------
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
> http://sourceforge.net/services/buy/index.php
> _______________________________________________
> mpls-linux-general mailing list
> mpl...@li...
> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general


-- 
James R. Leu
jl...@mi...

[mpls-linux-general] Test IPv6 forwarding problem

[<tr...@ya...>]

Hello there,

I try to add nhlfe for eth0 which using this command.

# mpls nhlfe add key 0 instructions push gen 1001 nexthop eth0 ipv6 3ffe:b00:3::1

NHLFE entry key 0x0000003d mtu 0 propagate_ttl
         (0 bytes, 0 pkts)


Then I use "mpls nhlfe show" command to check the configuration. 

# mpls nhlfe show

NHLFE entry key 0x0000003d mtu 1496 propagate_ttl
        push gen 1001 set eth0 ipv6 3ffe:b00:3::  (0 bytes, 0 pkts)


but, the ipv6 address of nexthop is incorrect.
Please let me know if I am missing any step or any thing is incorrect.

Thanks & Regards.


      ______________________________________________________________________________________________________
付費才容量無上限？Yahoo!奇摩電子信箱2.0免費給你，信件永遠不必刪！ http://tw.mg0.mail.yahoo.com/dc/landing

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Re: [mpls-linux-general] MPLS implementation on Linux

[James R. L. <jl...@mi...>]

Hello David,

Replying-inline

On Tue, Jun 03, 2008 at 04:16:18PM +0200, =?ISO-8859-1?Q?David_Mart=EDnez_ wrote:
> Hello everybody!
> 
> First of all, i have to tell that i am newbie on MPLS and i would
> appreciate any suggestion or help about the topic.
> I am trying to implement MPLS 1.950 as in the guide
> http://www.elcom.pub.ro/~adrian.popa/mpls-linux/mpls-linux-docs/1-3-installation.html
> I am using Kubuntu 7.10 (kernel 2.6.22-14) and i am trying to compile
> linux kernel 2.6.15.1 (after being patched for MPLS 1.950). For doing
> the compilation i have followed a lot of "how to compile" found on the
> Internet but finally nothing worked out, giving all kind of errors and
> warnings. I also tried to modify the gcc version and compile other
> MPLS-patched kernel versions obtaining the same result.
> 
> I am really frustrated about this and i would like to know which
> method you used for implementing MPLS on Linux, which guide you
> followed, or which Linux distribution.

There are a couple of options available to you.

I do all my development and testing on fedora.  Currently fedora 8 is
my distribution of choice, but I support fedora 7 as well.  I will
being the process of supporting fedora 9 in the coming weeks.  With
this in mind, using fedora 8 is the easiest path to running a physical
machine with MPLS support.

If you are just looking for an experimental network you should consider
NetKit which has added MPLS support recently.

    http://www.netkit.org/

It uses User Mode Linux to provide a simulated network environment.

The path you are currently on is an option as well, but is only suggested
for those who know the intimate details of how to build kernel packages
for their distribution.

> Thank you very much in advance,
> 
> David
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2008.
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> _______________________________________________
> mpls-linux-general mailing list
> mpl...@li...
> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general

-- 
James R. Leu
jl...@mi...

[mpls-linux-general] MPLS implementation on Linux

[D. M. <acu...@gm...>]

Hello everybody!

First of all, i have to tell that i am newbie on MPLS and i would
appreciate any suggestion or help about the topic.
I am trying to implement MPLS 1.950 as in the guide
http://www.elcom.pub.ro/~adrian.popa/mpls-linux/mpls-linux-docs/1-3-installation.html
I am using Kubuntu 7.10 (kernel 2.6.22-14) and i am trying to compile
linux kernel 2.6.15.1 (after being patched for MPLS 1.950). For doing
the compilation i have followed a lot of "how to compile" found on the
Internet but finally nothing worked out, giving all kind of errors and
warnings. I also tried to modify the gcc version and compile other
MPLS-patched kernel versions obtaining the same result.

I am really frustrated about this and i would like to know which
method you used for implementing MPLS on Linux, which guide you
followed, or which Linux distribution.

Thank you very much in advance,

David

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Re: [mpls-linux-general] Problem with CPU overload in older PCs

[lucapilosu\@libero\.it <luc...@li...>]

802.11a channels (in 5 GHz band) are supposed to be non-overlapping, but with a spectrum analyzer I saw that my board's channels spectrum is not very sharp, but they have some tails that partially overlap with the "neighbours".


---------- Initial Header -----------

>From      : "Adrian Popa" adr...@gm...
To          : "luc...@li..." luc...@li...
Cc          : "mpls-linux-general" mpl...@li...
Date      : Tue, 20 May 2008 18:35:02 +0300
Subject : Re: [mpls-linux-general] Problem with CPU overload in older PCs







> [offtopic]
> Aren't 802.11 channels supposed to overlap?
> 
> Quote from wikipedia:
> http://en.wikipedia.org/wiki/IEEE_802.11#Channels_and_international_compatibility
> 
> 802.11 divides each of the above-described bands into channels, analogously
> to how radio and TV broadcast bands are carved up but with greater channel
> width and overlap. For example the 2.4000-2.4835 GHz band is divided into 13
> channels each of width 22 MHz but spaced only 5 MHz apart, with channel 1
> centered on 2412 MHz and 13 on 2472, to which Japan adds a 14th channel 12
> MHz above channel 13.
> 
> True, this only applies to 2.4GHz bandwidth, not to 5GHz used by 802.11a...
> [/offtopic]
> 
> On Mon, May 19, 2008 at 4:26 PM, luc...@li... <luc...@li...>
> wrote:
> 
> > Solved!
> > My problem was caused by 2 WiFi channels that were too close to each
> > other...(don't ask me why two 802.11a channels are overlapping!!).
> > Thanks a lot all the same.
> > Luca
> >
> >
> 

Re: [mpls-linux-general] Problem with CPU overload in older PCs

[Adrian P. <adr...@gm...>]

[offtopic]
Aren't 802.11 channels supposed to overlap?

Quote from wikipedia:
http://en.wikipedia.org/wiki/IEEE_802.11#Channels_and_international_compatibility

802.11 divides each of the above-described bands into channels, analogously
to how radio and TV broadcast bands are carved up but with greater channel
width and overlap. For example the 2.4000-2.4835 GHz band is divided into 13
channels each of width 22 MHz but spaced only 5 MHz apart, with channel 1
centered on 2412 MHz and 13 on 2472, to which Japan adds a 14th channel 12
MHz above channel 13.

True, this only applies to 2.4GHz bandwidth, not to 5GHz used by 802.11a...
[/offtopic]

On Mon, May 19, 2008 at 4:26 PM, luc...@li... <luc...@li...>
wrote:

> Solved!
> My problem was caused by 2 WiFi channels that were too close to each
> other...(don't ask me why two 802.11a channels are overlapping!!).
> Thanks a lot all the same.
> Luca
>
>

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Re: [mpls-linux-general] Problem with CPU overload in older PCs

[Chris R. <Chr...@nr...>]

James

Speaking of..... did you see my last request for the development tree?   
Sorry for being pushy on this... idle tester here.....

As an update, the 10GE configurations are in place and hope to have the 
20G Infinband systems in place by weeks end.  Also, we are building a 
slightly modified 10GE configuration from the baseline with PEs 
interfacing to CEs over multiple interfaces which are then either bond 
into a single aggregate flow or configured with traffic control 
signaling to deliver various QoS managed flows.  More things we need to 
see how the MPLS code responds too.

....chris

James R. Leu wrote:
> I'm glad you worked out your issue.  But just so you know there is a
> performance bottle neck when you try to using interfaces in the 1Gbs and
> 10 Gbs range.  I'm working with another user to try and identify the
> issues.  If you move your testing to higher speed interfaces let me
> know and I can include you in the research.
>
> On Mon, May 19, 2008 at 03:26:05PM +0200, luc...@li... wrote:
>   
>> Solved!
>> My problem was caused by 2 WiFi channels that were too close to each other...(don't ask me why two 802.11a channels are overlapping!!).
>> Thanks a lot all the same.
>> Luca
>>
>>
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by: Microsoft 
>> Defy all challenges. Microsoft(R) Visual Studio 2008. 
>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
>> _______________________________________________
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>> mpl...@li...
>> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general
>>     
>
>   
> ------------------------------------------------------------------------
>
> -------------------------------------------------------------------------
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> Defy all challenges. Microsoft(R) Visual Studio 2008. 
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>
> _______________________________________________
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>   

-- 
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Senior Computer Scientist, GS-15
Naval Research Laboratory
Center for Computational Science
Networking, Code 5591
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