Subject: [CCAMP] WG Last Call Comments on "GMPLS Enhancement for Signal and Network Element Compatibility of Wavelength Switched Optical Networks"

From: Acee Lindem <[email-masked]>
Date: Tue, 29 Oct 2013 22:16:13 +0000

I have the following comments on the subject draft:

               1. State the action to take if the new TLV and sub-TLVs or their attendant encodings are malformed. You should log the problem and ignore the entire LSA, subsuming TLV, or just the sub-TLV in GMPLS path computations.
               2. Section 2 - Your definition of "At most once" is semantically wrong. "At most once" means the TLV or sub-TLV can be include one time or not at all. It has nothing to with whether or not it should be specified. I hope we are not going to attempt to change the English language with this draft.
               3. Section 3 - Figure 1 should not span multiple pages and the scale is off by one - it should be shifted right 1 column.
               4. Section 6 - Explicitly state which are IANA registries are being extended. Since you are adding a new TLV, you will also need a new registry for the sub-TLVs. Seehttp://www.iana.org/assignments/ospf-traffic-eng-tlvs/ospf-traffic-eng-tlvs.xhtml#top-level for examples.

Editorial Comments:

I would suggest the following corrections:

125c125
<    to allow both multiple WSON signal types and common hybrid electro
---
>    to support both multiple WSON signal types and common hybrid electro
197c197
<    node. It is constructed of a set of sub-TLVs. There are no ordering
---
>    node. It is comprised of a set of sub-TLVs. There are no ordering
203c203
<    encodings of these properties are defined in [WSON-Encode].
---
>    encodings for these properties are defined in [WSON-Encode].
253,254c253
<    router, as described in [RFC3630] and [RFC5250]. Resource Block
<    Information
---
>    router, as described in [RFC3630] and [RFC5250].
279,280c278,279
<    The detail encodings of these sub-TLVs are found in [WSON-Encode] as
<    indicated in the table below.
---
>    The detailed encodings of these sub-TLVs are found in [WSON-Encode]
>    as indicated in the table below.
293c292
<    relation to the switching device. In particular it indicates the
---
>    relation to the switching device. In particular, it indicates the
302,303c301,302
<    reach or leave all the resources. Resource Block Wavelength
<    Constraints sub-TLV describe these properties.
---
>    reach or leave all the resources. The Resource Block Wavelength
>    Constraints sub-TLV describes these properties.
316c315
<    case then wavelength availability on these shared fibers is needed
---
>    case, then wavelength availability on these shared fibers is needed
353c352
<    Bandwidth TLV are defined (TBA by IANA):
---
>    Bandwidth sub-TLVs are defined (TBA by IANA):
402c401
<    produce LSAs that exceed the IP Maximum Transmission Unit (MTU). In
---
>    produce LSAs that exceeds the IP Maximum Transmission Unit (MTU). In
417,422c416,421
<    is received for a system path cannot make use of the other four sub-
<    TLVs since it does not know the nature of the resources, e.g., are
<    the resources wavelength converters, regenerators, or something
<    else. Once this sub-TLV is received path computation can proceed
<    with whatever of the additional types of sub-TLVs it may have
<    received (there use is dependent upon the system type). If path
---
>    is received for a system, path compuation cannot make use of the
>    other four sub-TLVs since it does not know the nature of the
>    resources, e.g., are the resources wavelength converters,
>    regenerators, or something else. Once this sub-TLV is received,
>    path computation can proceed with whatever sub-TLVs it may have
>    received (their use is dependent upon the system type). If path
433c432
<    these sub-TLVs then there is the possibility of either (a) path
---
>    these sub-TLVs, then there is the possibility of either (a) path

Thanks,
Acee