Re: [Lsr] FW: New Version Notification for draft-wang-lsr-passive-interface-attribute-04.txt

[Aijun Wang <[e-mail]>]

Hi, Acee:

Thanks for this comments.
The consideration for the position of flagging the passive interface have been stated in the updated 05 version https://tools.ietf.org/html/draft-wang-lsr-passive-interface-attribute-05#section-3, as the followings:

   ISIS [RFC5029] defines the Link-Attributes Sub-TLV to carry the link
   attribute information, but this Sub-TLV can only be carried within
   the TLV 22, which is used to described the attached neighbor.  For
   passive interface, there is no ISIS neighbor, then it is not
   appropriate to use this Sub-TLV to indicate the passive attribute of
   the interface.

   OSPFv2[RFC2328] defines link type field within Router LSA, the type 3
   for connections to a stub network can be used to identified the
   passive interface.  But in OSPFv3 [RFC5340], type 3 within the
   Router-LSA has been reserved.  The information that associated with
   stub network has been put in the Intra-Area-Prefix-LSAs.

What about your opinions regarding to the above statements? Currently, we think putting the flag within the prefix attribute that associated the passive interface is appropriate.
If we can find other appropriate/acceptable place to hold this information, we can also update the draft later accordingly.


Best Regards

Aijun Wang
China Telecom


-----Original Message-----
From: Acee Lindem (acee) [mailto:[e-mail]] 
Sent: Thursday, November 5, 2020 4:11 AM
To: Aijun Wang <[e-mail]>
Cc: Aijun Wang <[e-mail]>; Peter Psenak (ppsenak) <[e-mail]>; [e-mail]
Subject: Re: [Lsr] FW: New Version Notification for draft-wang-lsr-passive-interface-attribute-04.txt

Hi Aijun,
You still didn't answer the question as to why you didn't rework this draft for passive interface to be an interface attribute rather than a prefix attribute? 
Thanks,
Acee

On 10/1/20, 6:13 AM, "Acee Lindem (acee)" <[e-mail]> wrote:

    Hi Aijun, 
    You didn't answer my question and pruned my message. Other than your attempt to expose the topology of areas outside the area, there is no other reason to associate the passive interface attribute with a prefix. We seem to be in a circular discussion.... 
    Acee

    On 9/30/20, 10:43 PM, "[e-mail] on behalf of Aijun Wang" <[e-mail]> wrote:

        Hi, Acee:
        Except the corner cases of unnumbered interface, would you like to illustrate other scenarios that the process does not apply?
        As mentioned in last mail, knowing the passive interfaces can assist the nodes or controller know the boundaries of the network.

        Aijun Wang
        China Telecom

        > On Sep 30, 2020, at 19:47, Acee Lindem (acee) <[e-mail]> wrote:
        >