Re: [DMM] regarding the re-chartering..

["Sri Gundavelli (sgundave)" <[e-mail]>]

I do not see a reason why multiple MN-Id instances need to be present in a
single message ? In my experience, this is strictly a deployment
consideration, when to use what type of identifiers.

Assuming the backend system can tie all the MN-Id's to a single
subscription, any presented identifier can be sufficient for the gateway
to do the BCE lookup.

If multiple instances can be present, then we need to deal with more error
cases. Is that really needed ?


> I am wondering if it would not be more appropriate to go for a different
>container option to carry such information. Something like a
>complementary identifier option.

Sounds interesting. Are you suggesting we leave the current MN-ID as it
is, but use a new complementary option ? But, if the requirement is for a
Mac based identifiers, what will be there in the current MN-Id option ? We
still need to have identifier there ?




Sri





On 9/11/14 2:03 AM, "Marco Liebsch" <[e-mail]> wrote:

>No issue with logical vs. physical ID. But I am wondering about two
>things:
>
>Operation is clear to me in case a single MNID is present in a message
>and I see the value in being
>flexible to choose from different sub-types. If multiple MNIDs with
>different sub-types are present in
>a single message, which one should e.g. the LMA take for the BC lookup..
>No big problem to solve, but
>to be considered in implementations.
>
>If the reason for multiple present MNIDs with different sub-types is to
>do other things than identifying
>the node or using the ID as key for a lookup, I am wondering if it would
>not be more appropriate
>to go for a different container option to carry such information.
>Something like a complementary
>identifier option.
>
>marco
>
>>-----Original Message-----
>>From: Sri Gundavelli (sgundave) [mailto:[e-mail]]
>>Sent: Donnerstag, 11. September 2014 00:42
>>To: Charlie Perkins; Marco Liebsch; [e-mail]
>>Cc: Vijay Devarapalli
>>Subject: Re: [DMM] regarding the re-chartering..
>>
>>Hello Charlie,
>>
>>Agree with that. MN-Id as its defined today is a logical identifier. It
>>does not
>>require the identifier to be bound to a physical device or a interface
>>identity.
>>But, we have clearly seen requirements where the need is for generating
>>identifiers based on some physical identifiers. Those physical
>>identifiers include
>>IMSI, MSISDN, IMEI, MAC ..etc. If we can define a type for each of the
>>source
>>and the rules for generating MN-ID based using those sources, the sender
>>and
>>receiver will have clear guidance on how to use the spec. Some pointers,
>>explanation and examples for each of those identifiers will greatly help
>>avoid
>>inter-op issues.
>>
>>
>>Regards
>>Sri
>>
>>
>>
>>
>>
>>
>>
>>On 9/10/14 3:21 PM, "Charlie Perkins" <[e-mail]>
>>wrote:
>>
>>>
>>>Hello folks,
>>>
>>>I think it's best to consider the MNID as simply living in a space of
>>>identifiers, and not worry too much about whether it's a logical
>>>identifier or a physical identifier.  If the former, then somewhere
>>>(perhaps below the network layer) the logical identifier has been bound
>>>to something in the physical interface, but that's not our problem.
>>>
>>>The number space for types of MNIDs is likely to stay pretty empty, so
>>>I'd say we could add as many types as would be convenient for the
>>>software designers.  So, we could conceivably have several MNIDs
>>>defined that all "looked like" NAIs (which, themselves, "look like"
>>>FQDNs).
>>>
>>>Regards,
>>>Charlie P.
>>>
>>>
>>>
>>>On 9/10/2014 8:11 AM, Sri Gundavelli (sgundave) wrote:
>>>> Yes. Currently, the MNID is if the nai format and is overloaded. The
>>>>MNID  in 3GPP specs is the IMSI-NAI (IMSI@REALM), its based on the
>>>>IMSI. Ex:
>>>> "<IMSI>@epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org²
>>>>
>>>> We also have MAC48@REALM;
>>>>
>>>> We also have approaches to transform MAC to Pseudo IMSI, and then
>>>> carry IMSI-NAI as the MN-ID.
>>>>
>>>>
>>>> So, we need unique sub-types for each of the types/sources.
>>>>
>>>> MN-Id based on IMSI, MSISDN, IMEI, MAC ..
>>>>
>>>> Also, do we need to distinguish between IMSI and IMSI-NAI ?
>>>>
>>>> Sri
>>>>
>>>>
>>>>
>>>> On 9/10/14 6:29 AM, "Marco Liebsch" <[e-mail]> wrote:
>>>>
>>>>> It seems the MNID is somehow overloaded to carry both, node-specific
>>>>>IDs,  e.g. MAC, as well as subscriber IDs, which is the IMSI.
>>>>> There may be value in adding the IMEI to the list of possible types
>>>>>of  node-specific IDs.
>>>>>
>>>>> marco
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: dmm [mailto:[e-mail]] On Behalf Of Sri Gundavelli
>>>>>> (sgundave)
>>>>>> Sent: Dienstag, 9. September 2014 23:30
>>>>>> To: Sri Gundavelli (sgundave); Charlie Perkins; [e-mail]
>>>>>> Cc: Vijay Devarapalli
>>>>>> Subject: Re: [DMM] regarding the re-chartering..
>>>>>>
>>>>>> Two more comments.
>>>>>>
>>>>>>
>>>>>>
>>>>>> 4.) I'd also use sub-type value of (2) for IMSI. Just to align with
>>>>>>the  sub-types  defined for MN Id defined for ICMP. I suspect there
>>>>>>are some  implementations  already using sub-type (2). Please see
>>>>>>the other thread.
>>>>>>
>>>>>>
>>>>>> 5.) For each of the sub-types, we need text including examples and
>>>>>>some
>>>>>> explanation on how they are used.
>>>>>>
>>>>>>
>>>>>> Sri
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 9/9/14 2:20 PM, "Sri Gundavelli (sgundave)" <[e-mail]>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Charlie,
>>>>>>>
>>>>>>> This is good. Thanks.
>>>>>>>
>>>>>>>
>>>>>>> 1.) If EUI-48 and EUI-64 addresses are derived of a 48-bit IEEE
>>>>>>>802.2
>>>>>>> address, why do we need to two sub-types ? Why not have just one
>>>>>>> sub-type for mac based identifiers ?
>>>>>>>
>>>>>>> 2.) Sub type value (1) is currently used. Its currently overloaded
>>>>>>>for
>>>>>>> IMSI-NAI (3GPP specs) and generic NAI based identifiers. Given the
>>>>>>> definition of new sub-types, we need some text explaining the
>>>>>>> motivation
>>>>>>>
>>>>>>> 3.) Proposed Sub-type value of (2) for IPv6 address. What exactly
>>>>>>>is
>>>>>>> this ? Are these CGA-based IPv6 addresses ?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>                      New Mobile Node Identifier Types
>>>>>>>
>>>>>>>                +-----------------+------------------------+
>>>>>>>                | Identifier Type | Identifier Type Number |
>>>>>>>                +-----------------+------------------------+
>>>>>>>                | IPv6 Address    | 2                      |
>>>>>>>                |                 |                        |
>>>>>>>                | IMSI            | 3                      |
>>>>>>>                |                 |                        |
>>>>>>>                | P-TMSI          | 4                      |
>>>>>>>                |                 |                        |
>>>>>>>                | EUI-48 address  | 5                      |
>>>>>>>                |                 |                        |
>>>>>>>                | EUI-64 address  | 6                      |
>>>>>>>                |                 |                        |
>>>>>>>                | GUTI            | 7                      |
>>>>>>>                +-----------------+------------------------+
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Regards
>>>>>>> Sri
>>>>>>> PS: Good to see Vijay back
>>>>>>>
>>>>>>>
>>>>>>> On 9/9/14 1:28 PM, "Charlie Perkins"
>>>>>>><[e-mail]>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Hello folks,
>>>>>>>>
>>>>>>>> Here's the last Internet Draft that we did, long ago expired:
>>>>>>>> http://www.ietf.org/archive/id/draft-perkins-mext-4283mnids-01.txt
>>>>>>>>
>>>>>>>> I'll resubmit it with a few updates as a personal draft to dmm.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Charlie P.
>>>>>>> _______________________________________________
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