Thread Links | Date Links | ||||
---|---|---|---|---|---|
Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
Hi Duncan, Thanks for reviving the thread and for the updated figures. Yes, these seem more inline with your original slides (at least for option2). Few questions: Option1: In your slides (#7), the APs serving legacy STAs appear to be the same as the APs affiliated with the AP MLD (AP1, AP2). In your updated figures however, they appear to be independent APs (with different L2 AMC Addresses a5, a6). Or, did
you mean that a1, a2, a3 can also serve legacy STAs? Figure shows legacy STAs associating with a5, a6 and not a1, a2. I thought Option 1 was about the SSID being the same on all links? Option2: I am supportive of option 2, I agree its good to be able to configure different SSIDs; however wanted to clarify few points: 1) If all links used the same parameters (SSID, security scheme etc.), would the MLOSSID still be required? 2) The legacy ssid6 seems to be served through the MLD MAC SAP? If so, why does ssid24 and ssid5 need to be served through different MAC SAPs? Or, the MAC SAP for ssid6 just not shown in the figure? 3) What are the assumptions for BSSIDs of each link? I assume they are same for both legacy and MLDs? If so, any thought on how the devices on a link handle broadcast traffic of different SSIDs? E.g. on the 2.4 link, legacy STAs (on ssid24)
will also receive broadcast traffic for MLOSSID (encrypted with WPA3) and will not be able to decrypt them and vice-versa right? 4) Is it necessary to restrict the MLOSSID to be the same for all links of an AP MLD? E.g. any reason why a 4 link AP MLD, cannot advertise two different MLOSSID, say 1 (MLOSSID1:STAFF) for links 1, 2 and another (MLOSSID1:GUEST) for links3,
4? The AP MLD could server 2-links non-AP MLDs on different SSIDs. This seems to be an unnecessary restriction at .11 level, forcing all links to operate with same security scheme etc. Wouldn’t this be better left to vendors to configure; .11 spec would only
needs to provide the means to signal the SSIDs? Regards, Rojan From: Duncan Ho <dho@xxxxxxxxxxxxxxxx> Hi Rojan, So sorry I missed your email till now and thought this thread went cold! Thanks for your questions and comments. I think the previous diagrams may be too complicated and distracting. I’ve attached a much simpler example for option 2 and option 1, which hopefully will answer some of your questions too. Yes, I prefer option 2 since it’s more flexibility. Hopefully we can revive this thread. Thanks, Duncan From:
rojan.chitrakar@xxxxxxxxxxxxxxxx <rojan.chitrakar@xxxxxxxxxxxxxxxx>
CAUTION: This email originated from outside of
the organization. Hi Duncan, Thanks for this, this figure is much clearer and is very helpful for discussions, to ensure we are on the same page.
I guess this figure is for the case with VAPs-option 1? (slide 8), but even then the scenario depicted are not exactly the same as in the slides. My original comments were more targeted for option 2 and the case without VAPs (Slide 7),
do you have a similar figure for slide 7 & 9? I thought you were promoting Option 2 (btw I am supportive of the motivation behind it)? On this figure, I think the case of the non-MLO guest device is the most interesting. Is this a legacy STA or a EHT STA? If it’s a EHT STA, how are legacy (pre-EHT) STAs served: all by a6 only? About AP MLD2: 1) How are the SSIDs advertised, in this example I would think the legacy method is sufficient? 2) Does the non-MLO guest device also accesses the DS through the MAC-SAP2? Your answers to my earlier email seem to imply legacy STAs go through different MAC-SAPs. Regards, Rojan From: Duncan Ho <dho@xxxxxxxxxxxxxxxx>
Hi Rojan, Sorry about that. I’ve attached both the .vsd and jpg formats. Please let me know if you still have problems opening them. Thanks, Duncan From:
rojan.chitrakar@xxxxxxxxxxxxxxxx <rojan.chitrakar@xxxxxxxxxxxxxxxx>
CAUTION: This email originated from outside of
the organization. Hi Duncan, Thanks. I am not able to open the attached image (perhaps I am using older version of visio). Could you resend in a different format: jpg or .vsd? Thanks. Regards, Rojan From: Duncan Ho <dho@xxxxxxxxxxxxxxxx>
Hi Rojan, Ming, Xiaofei, and Thomas, Thanks for the discussion and I’ve attached a diagram for easier discussion. Please refer to it if it helps to illustrate your points. Please also see my response inline below. From: Thomas Derham <00000ad2eabc2931-dmarc-request@xxxxxxxxxxxxxxxxx>
CAUTION: This email originated from outside of
the organization. >> we can leave SSID for operators >> leave SSID setting to the network operator/user like today, not need to add the restriction to .11 spec Could you guys please clarify what you mean by this? (1) Do we agree that, per the *current* standard, there is already a “restriction” that one BSS (which has a unique BSSID) has exactly one SSID? [DH] Agree and that’s been my assumption. (2) Is anyone proposing that it should be possible for one AP MLD to have more than one SSID (for MLD operation)? If so, why? [DH] Second these questions. (3) Is the discussion *only* about whether or not it should be possible for the BSSs that are affiliated with the same AP MLD to have different SSIDs (from
each other, and/or from the AP MLD) for some kind of legacy purposes? [DH] Yes, that’s my goal here to focus on just this aspect first. Per people’s comment it seems there are different understanding even with pure green field MLO case (no legacy clients involved).
- Related: Are there any use cases in which a non-AP STA that supports MLO would first want to associate to a single BSS without any MLD discovery/association, and
then subsequently discover/associate to the MLD device? [DH] Not that I’m aware of. In fact, the current MLO discovery design is trying to convey MLO info pre-assoc to give the client a choice. -Thomas On June 18, 2020 at 8:55:13 AM, Xiaofei Wang (xiaofei.wang@xxxxxxxxxxxxxxxx) wrote:
To unsubscribe from the STDS-802-11-TGBE list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 To unsubscribe from the STDS-802-11-TGBE list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 To unsubscribe from the STDS-802-11-TGBE list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 |