Re: [CCAMP] AD review of draft-ietf-ccamp-gmpls-otn-b100g-applicability-09

[John Scudder <[e-mail]>]

Hi Radha,

I’ve just reviewed the diff, and I think it looks just about ready. Thanks especially for the expanded terminology section, I think that was a helpful improvement.

I do have two final things to point out:

First, it looks like you missed supplying a definition for WXC? (I eventually worked out that it must mean “wavelength cross-connect”.) Then again you did supply a definition for OXC which isn’t used anywhere in the document. I’m guessing these are either synonyms or near-synonyms, anyway please make whatever adjustment you deem appropriate.

Second, the OTUCn lines got left-shifted in Figure 1 of version 10, vs. version 9.

Here’s version 9:


    +--------+           +--------+
    |        +-----------+        |
    | OTN    |-----------| OTN    |
    | DXC    +-----------+ DXC    |
    |        |           |        |
    +--------+           +--------+
        <--------ODUCn------->
         <-------OTUCn------>

    +--------+        +--------+        +--------+          +--------+
    |        +--------+        |        |        +----------+        |
    | OTN    |--------| OTN    |        | OTN    |----------| OTN    |
    | DXC    +--------+ WXC    +--------+ WXC    +----------+ DXC    |
    |        |        | 3R     |        | 3R     |          |        |
    +--------+        +--------+        +--------+          +--------+
        <-------------------------ODUCn-------------------------->
         <---------------> <---------------> <------------------>
              OTUCn              OTUCn               OTUCn

                           Figure 1: ODUCn signal


Here’s version 10:


    +--------+           +--------+
    |        +-----------+        |
    | OTN    |-----------| OTN    |
    | DXC    +-----------+ DXC    |
    |        |           |        |
    +--------+           +--------+
        <--------ODUCn------->
   <-------OTUCn------>

    +--------+        +--------+        +--------+          +--------+
    |        +--------+        |        |        +----------+        |
    | OTN    |--------| OTN    |        | OTN    |----------| OTN    |
    | DXC    +--------+ WXC    +--------+ WXC    +----------+ DXC    |
    |        |        | 3R     |        | 3R     |          |        |
    +--------+        +--------+        +--------+          +--------+
        <-------------------------ODUCn-------------------------->
   <---------------><---------------><------------------>
              OTUCn              OTUCn               OTUCn

                           Figure 1: ODUCn signal


I think version 9 must be the correct representation? (There were a few other formatting artifacts and other nits that were introduced in version 10, but none of them seemed to make any substantive difference, unlike this one which seems like it could lead to reader puzzlement.)

Thanks,

—John