Re: [rbridge] Call for draft-tissa-trill-cmt-00 to WG draft

[[e-mail]]

Hi Tissa

In your CMT draft, if one old RBridge is momitored not supporting 
affinitive-TLV, the CMT function will be disbale in all the TRILL campus. 
In my mind, that's your discussion for backward compatibility in CMT. So 
CMT can not work until all the RBridges support affinitive-TLV.

However, in the PN draft, there is no such backward compatibiltiy. PN 
draft employs pseudo-LSP to announce the pseudo-nickname and members of a 
virtual RBridge. If the pseudo-nickname and the members are configured 
statically by network administors, no hello PDUs are necessary between the 
members of a virtual RB group. So the pseudo-LSP method given in PN draft 
can also work for the scenario described in your CMT draft.


Thanks,
Zhai Hongjun
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 Protocol Development Dept.VI, Central R&D Institute, ZTE Corporation
 No. 68, Zijinghua Road, Yuhuatai District, Nanjing, P.R.China, 210012
 
 Zhai Hongjun
 
 Tel: [phone]
 Email: [e-mail]
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""





"Tissa Senevirathne (tsenevir)" <[e-mail]> 
发件人:  [e-mail]
2012-03-27 18:12

收件人
<[e-mail]>, "Donald Eastlake" <[e-mail]>
抄送
[e-mail], [e-mail]
主题
Re: [rbridge] Call for draft-tissa-trill-cmt-00 to WG draft






Hi Hu
 
CMT draft discuss about backward compatibility  and your assessment of RPF 
failure when older RBridges present is incorrect.
 
Additionally I am not clear PN draft can be utilized for the scenario 
described in the CMT. Per the discussion we have in Taipie, most Data 
Centers and Enterprise have multi home devices connected to the TRILL 
edge. They will not let LAN Hello to pass through them because of the LAG 
bundling at the edge. Please refer to the reference topology in the draft. 
Hence CMT draft address very crucial deployment scenario.
 
Thanks
Tissa
 
From: [e-mail] [mailto:[e-mail]] On 
Behalf Of [e-mail]
Sent: Monday, March 26, 2012 9:41 PM
To: Donald Eastlake
Cc: [e-mail]; [e-mail]
Subject: Re: [rbridge] Call for draft-tissa-trill-cmt-00 to WG draft
 

Hi,all 

We have discussed that there is back compatibility issue for CMT. Only if 
all the member RBridge of a virtual group support Affinity sub-tlv, the 
CMT can work correctly. If one of the member does't announce the virtual 
RBridge nickname and the Affinity sub-tlv, there may exist RPC check 
failure for the virtual RBridge. The issue that CMT try to solve is not an 
essential and key issue for trill, and CMT should be a optional solution. 
Some RBridges may not implement the feature. I wonder whether the CMT will 
does work actually because of the back compatibility issue. 

There is another solution (pseudonode nickname) solves the same issue. I 
suggest we should do further discussion with CMT and compare with the two 
solutions. 

Thanks



Donald Eastlake <[e-mail]> 
发件人:  [e-mail] 
2012-03-27 06:38 


收件人
[e-mail] 
抄送

主题
[rbridge] Call for draft-tissa-trill-cmt-00 to WG draft
 








During the TRILL session today, there was a consensus of those in the
room to make draft-tissa-trill-cmt-00.txt a TRILL WG draft. This is a
call on the WG mailing list to confirm that consensus. If you wish to
respond, please do so by April 10th.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   [phone] (cell)
 155 Beaver Street, Milford, MA 01757 USA
 [e-mail]

_______________________________________________
rbridge mailing list
[e-mail]
http://mailman.postel.org/mailman/listinfo/rbridge
_______________________________________________
rbridge mailing list
[e-mail]
http://mailman.postel.org/mailman/listinfo/rbridge




--------------------------------------------------------
ZTE Information Security Notice: The information contained in this mail is solely property of the sender's organization. This mail communication is confidential. Recipients named above are obligated to maintain secrecy and are not permitted to disclose the contents of this communication to others.
This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. Any views expressed in this message are those of the individual sender.
This message has been scanned for viruses and Spam by ZTE Anti-Spam system.

_______________________________________________
rbridge mailing list
[e-mail]
http://mailman.postel.org/mailman/listinfo/rbridge