writting NIC driver for IPV6

writting NIC driver for IPV6

[Gang Lei (雷刚)]

HI all:

Thanks for your help in advance. Could anyone tell me how to revise NIC driver to support IPV6? Or it doesn?t need driver?s change to support IPV6? Can anyone throw some light on this question?


Regards



Rick
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writting NIC driver for IPV6

[Michael Blizek]

Hi!

On 18:02 Tue 28 Jun     , Gang Lei (????) wrote:
> HI all:
> 
> Thanks for your help in advance. Could anyone tell me how to revise NIC driver to support IPV6? Or it doesn??t need driver??s change to support IPV6? Can anyone throw some light on this question?

You do not need to change the nic driver to support IPv6 unless it's the
driver is totally broken. Network cards and drivers operate on layer 2 and
generally do not care what you do on layer 3 and above. However in some cases
hardware accelerations like "TCP segmentation offloading" may be available
which partly violates this layer separation. But this is "only" a performance
issue.

	-Michi
-- 
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com

writting NIC driver for IPV6

[Gang Lei (雷刚)]

Thanks a lot, Michi.
Then how can I verify that IPV6 can be really running on our NIC? Of course I have to build a kernel which can support IPV6 firstly, but how to verify it?s really working? Use ping6?


Rick


From: kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces at kernelnewbies.org] On Behalf Of Michael Blizek
Sent: 2011?6?29? 0:38
To: Gang Lei (??)
Cc: kernelnewbies at kernelnewbies.org
Subject: Re: writting NIC driver for IPV6


Hi!

On 18:02 Tue 28 Jun     , Gang Lei (????) wrote:
> HI all:
>
> Thanks for your help in advance. Could anyone tell me how to revise NIC driver to support IPV6? Or it doesn??t need driver??s change to support IPV6? Can anyone throw some light on this question?

You do not need to change the nic driver to support IPv6 unless it's the
driver is totally broken. Network cards and drivers operate on layer 2 and
generally do not care what you do on layer 3 and above. However in some cases
hardware accelerations like "TCP segmentation offloading" may be available
which partly violates this layer separation. But this is "only" a performance
issue.

        -Michi
--
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com


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writting NIC driver for IPV6

[Mulyadi Santosa]

2011/6/29 Gang Lei (??) <gang.lei@mediatek.com>
>
> Thanks a lot, Michi.
>
> Then how can I verify that IPV6 can be really running on our NIC? Of course I have to build a kernel which can support IPV6 firstly, but how to verify it?s really working? Use ping6?

that....and IMO wireshark.... just see what the type of packets your
NIC sends over the wire....

--
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

writting NIC driver for IPV6

[Anupam Kapoor]

2011/6/29 Gang Lei (??) <gang.lei@mediatek.com>

>  Thanks a lot, Michi.****
>
> Then how can I verify that IPV6 can be really running on our NIC? Of course
> I have to build a kernel which can support IPV6 firstly, but how to verify
> it?s really working? Use ping6?
>
 yes apart from ping6, you can use:
         1. wireshark/ethereal for seeing ND messages on the wire
         2. if possible, setup ISATAP in your lab-network. ubuntu does have
a isatapd, so should other distributions.
         3. once you have (2) setup, update your resolver to do quad-A
queries by default i.e. 'option inet6'. if you use google's DNS, you should
be able to see dancing turtle at kame.org

for example, i have the following

is0       Link encap:IPv6-in-IPv4
          inet6 addr: 2001:420:5401:1:200:5efe:4067:9c63/64 Scope:Global
          inet6 addr: fe80::200:5efe:4067:9c63/64 Scope:Link
          UP RUNNING NOARP  MTU:1280  Metric:1
          RX packets:1352 errors:0 dropped:0 overruns:0 frame:0
          TX packets:872 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1575341 (1.5 MB)  TX bytes:72571 (72.5 KB)

<aside> can you find out where i work from above ? ;)

have fun...

anupam
-- 
In the beginning was the lambda, and the lambda was with Emacs, and Emacs
was the lambda.
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