Re: Ether Type and Protocol Type

Hi Abraham,

I guess IP within IP protocol number is 94 dude.

I have seen in the table where i can see 94 is the protocol number for IP
over IP encapsulation and not 4 .Correct me if a m wrong

On Thu, Dec 29, 2011 at 12:24 PM, CCIE KID <eliteccie_at_gmail.com> wrote:

> Hi Abraham Thank u for the link.
>
> One question is when there are two tags in Q in Q, What will be the TPID
> for the outer tag and inner tag
>
> I guess the outer TAG has a tag protocol identifier of 9100 and the inner
> vlan TAG has TPID of 8100 .
>
> So i am not very sure that this may be true.
>
> i guess 8100 is used for a single tag and 9100 is used for Q in Q tag :)
>
> So the outer tag has TPID of 9100 and inner tag has TPDI of 8100
>
>
> On Thu, Dec 29, 2011 at 12:08 PM, Abraham, Tharak <tharakabraham_at_gmail.com
> > wrote:
>
>> The value of TPID for Q in Q depends on the stack implementation from
>> different vendors
>> For Eg: Alcatel and Juniper uses 0x9100 and Cisco uses 0x8100
>>
>> In the case of IP in IP the Protocol number would be 4, which denotes IPv4
>>
>> http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml
>>
>> You may have to g00gle for more details and for other specific info.
>>
>> Best Regards,
>> Tharak Abraham Luke
>>
>>
>> On Wed, Dec 28, 2011 at 10:25 PM, Routing Freak <routingfreak_at_gmail.com
>> >wrote:
>>
>> > Hi all
>> >
>> > When will u find the ether type as Dot 1Q (0x8100) and Q in Q (0x9100)
>> >
>> > Wat s the protocol field in IP header when the payload it carries is
>> also
>> > another IP header ( in case of IP in IP tunnel).
>> >
>> > Can anyone send me a link for different values of protocol types ?
>> >
>> >
>> >
>> >
>> > On Tue, Dec 27, 2011 at 3:16 AM, Jochen Bartl <jochen.bartl_at_gmail.com
>> > >wrote:
>> >
>> > > Hi,
>> > >
>> > > my preferred way for getting answers to those questions is watching
>> > > frames/packets in Wireshark. If the Wireshark code of a particular
>> > > protocol is not broken, it is a very convenient way to find out about
>> > > the truth ;-)
>> > > Sample capture files for the protocols you have mentioned are
>> > > available on the following sites:
>> > >
>> > > http://packetlife.net/captures/ (Direct links to CloudShark)
>> > > - Example:
>> > >
>> >
>> http://www.cloudshark.org/view?url=http://packetlife.net/captures/802.1Q_tunneling.cap
>> > > * Ethernet(eth-type 0x8100)/802.1q (TPID 0x8100)/802.1q (TPID
>> > > 0x8000)/IPv4 (proto 1)/ICMP
>> > > http://wiki.wireshark.org/SampleCaptureshttp://pcapr.net/
>> > >
>> > > Best regards,
>> > >
>> > > Jochen
>> >
>> >
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>>
>>
>>
>>
>
>
> --
> With Warmest Regards,
>
> CCIE KID
> CCIE#29992 (Security)

Blogs and organic groups at http://www.ccie.net
Received on Thu Dec 29 2011 - 12:35:27 ART