Re: 10G ethernet and 802.1q

Paul, to be extremely technical, the current state of .1Q is 802.1Q-2005,
which is available here:
http://standards.ieee.org/getieee802/download/802.1Q-2005.pdf and it
incorporates all of the most recent amendments, including 802.1s, 802.1v,
etc. And it is one of the most recent standards out there.

In tech talk, I have always heard 802.1Q referring primarily to tagging
mechanism and it's properties, not it's manipulation, like spanning trees,
classification, management, etc.

P.S.: 802.1d was not improved per se, but instead replaced by more advanced
802.1w

On Sun, Apr 5, 2009 at 9:34 PM, Paul Cosgrove <paul.cosgrove_at_gmail.com>wrote:

> The standards are not static if course. There are often proposals to update
> existing standards, or to introduce new ones to replace them. TCP
> extensions for high performance were published in 1992; ECN and the
> authentication option being more recent examples Changes to 802.1d mean
> that it is not as slow as it once was, RSTP having replaced the older STP in
> 2004.
>
> There have also been various changes to 802.1Q protocol. It was originally
> specified according to the old 802.1d standard, but MSTP was included in the
> ammendments added to the specification in 2003.
>
> The full context would make it clearer, but perhaps the author is using
> layer 3 links with dynamic routing, instead of Layer 2 with MSTP.
> Paul.
>
>
> Pavel Bykov wrote:
>
>> TRILL is the way to go, so is the OTV. but it only builds upon 802.1q, and
>> does not replace it in any sense.
>> Whoever said that "the 802.1q...is old and does not support the high
>> bandwidth requirements for new services / applications." is a moron.
>> First of all, the sentence does not makes sense. TCP is really old, like
>> 30
>> years old, but we are not in a hurry to replace it. OLD does not mean BAD.
>> Second, it does not mention why it does not support the high bandwidth.
>>
>> What author may have meant, if he had any network experience, is that
>> 802.1D
>> (notice how .1D is not .1Q) is a protocol with many shortcomings,
>> including
>> slow convergence and absence of load balancing, which has to be provided
>> by
>> other standards, like 802.1AX, PVST, etc. And that routing will be used.
>>
>> But 802.1Q has no equal at this time. If you just want to use routing then
>> that's fine, but it is substantially different than L2 service enablement
>> which 802.1Q provides.
>>
>> P.S. forget ISL.
>>
>>
>> On Wed, Apr 1, 2009 at 9:57 AM, Evan Weston <evan_weston_at_hotmail.com>
>> wrote:
>>
>>
>>
>>> I went to a Cisco event yesterday and one of the presenters mentioned
>>> TRILL
>>> https://cisco.hosted.jivesoftware.com/message/2747 thought it was
>>> interesting...
>>>
>>> -----Original Message-----
>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>>> Shahid Ansari
>>> Sent: Wednesday, 1 April 2009 4:54 PM
>>> To: Hash Aminu
>>> Cc: Reza Toghraee; ccielab_at_groupstudy.com
>>> Subject: Re: 10G ethernet and 802.1q
>>>
>>> Hash,
>>>
>>> worked with ISP and havent used ISL ,dot1q is best to go(q in q tunnel)
>>> 1q also a standard across different vendors and guaranteed to work
>>> between
>>> different vendor equipments whereas ISL fails :)
>>> regarding the VLANS ,who want to create more than 1K/4k Vlans?
>>>
>>> Thanks
>>> Shahid
>>>
>>> On Tue, Mar 31, 2009 at 3:11 PM, Hash Aminu <hashng_at_gmail.com> wrote:
>>>
>>>
>>>
>>>> Reza/Shahid,
>>>>
>>>> while i will agree with you that most of them are implying to cisco
>>>> solution, I am aware of using 802.1q in cisco Gears can be less scalable
>>>>
>>>>
>>> as
>>>
>>>
>>>> the # of VLANs grows..hence you will run out of virtual ports (total #
>>>> of
>>>> Vlans passing thru a .1q trunk X the number of ports)..mostly the limits
>>>>
>>>>
>>> is
>>>
>>>
>>>> 6k per any line card.
>>>>
>>>> HTH
>>>>
>>>> Hash
>>>>
>>>>
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>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>

-- 
Pavel Bykov
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