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Re: [1904.2 TF] VLANs and UMT Sublayer

Kevin,

 

I will be happy to show the exact rules that would accomplish what you need if you could clarify what exactly your use case tries to do.

 

Specifically, please, clarify these questions:

1)      For all three frames types, is the DA equal to the receiving portâ??s MAC address?

2)      What is the UMTPDU subtype?

3)      Do you want the receiving device to verify that the UMTPDU is received with exactly VLAN X and discard the frame is it is either untagged or if VLAN value is not X?

 

The answer to your question in red is No, the EISS is not the same as MA_DATA.request/indication. ESS is located in different place (see the figure below) and its primitives (EM_UNITDATA.request and EM_UNIDATA.indication) have many more parameters then are present in MA_DATA primitives.  The MA_DATA interfaces maps into ISS (M_UNITDATA.request/indication primitives) and the mapping is described in the 802.1AC, Section 13.1.

 

 

 

I am not sure why this is even a question, though. Anything above UMT remains as it is now. None of the higher layers even know if UMT sublayer is there or not.

 

 

 

-Glen

 

From: Kevin Noll [mailto:kevin.noll@xxxxxxxxxxxx]
Sent: Friday, May 01, 2020 1:39 PM
To: stds-1904-2-TF@xxxxxxxxxxxxxxxxx
Cc: Glen Kramer <glen.kramer@xxxxxxxxxxxx>; Curtis (CableLabs) <c.knittle@xxxxxxxxxxxxx>; Pradeep Kondamuri <pkondamu@xxxxxxxxx>
Subject: VLANs and UMT Sublayer

 

Glen,

 

I continue to be puzzled by the ability of UMT sublayer to add/remove and filter based on VLAN tags.

 

Could you take a look at the attached figures and help me understand how this would work and what I am misunderstanding.

 

--kan--

 

 

 

--

Kevin A. Noll

Sr. Director, Systems Architecture

Tibit Communications

kevin.noll@xxxxxxxxxxxx

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