Re: [OSPF] Jari Arkko's Discuss on draft-ietf-ospf-ttz-05: (with DISCUSS and COMMENT)

[Huaimo Chen <[e-mail]>]

Hi Jari,

    Thank you very much for your time to review the document, your valuable discuss and comment. 
    My explanations/discussions are inline below with prefix [HC].

Best Regards,
Huaimo
-----Original Message-----
From: Jari Arkko [mailto:[e-mail]] 
Sent: Thursday, January 05, 2017 7:36 AM
To: The IESG
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Subject: Jari Arkko's Discuss on draft-ietf-ospf-ttz-05: (with DISCUSS and COMMENT)

Jari Arkko has entered the following ballot position for
draft-ietf-ospf-ttz-05: Discuss

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DISCUSS:
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Thank you for working on this important spec.

I would like to recommend its approval, but before that I had a request
for a clarification, inspired by Orit Levin's Gen-ART review.

In Section 5.1, what specifically is the requirement regarding OSPF
TTZ/TTZID uniqueness. It just says "unique within a network". For
instance, if I have TTZID 17 under Area 0 and Area 223 among the same set
of routers implementing multiple Areas simultaneously, is that allowed?
Or are different Areas automatically different networks?
[HC]: A TTZID such as 17 is allowed under multiple areas such as 
under Area 0 and Area 223. 
We will change "network" to "OSPF area" accordingly in the document.
"unique within a network" SHOULD be "unique within an OSPF area".
In other words, TTZ/TTZID uniqueness is under an OSPF area.

Can you specify an algorithm or rule, or make the current wording more
precise?
[HC]: We will make the current wording more precise.
Do you think that changing "network" to "OSPF area" accordingly makes  
it clear/precise?

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COMMENT:
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Other comments from Orit are also worth noting.