[CCAMP] Examples in draft-ietf-ccamp-gmpls-ospf-g709v3-05

["Gruman, Fred" <[e-mail]>]

Hi Daniele,

I'm looking through the examples in Section 5.2 and have the following comments regarding the setting of TSG:

1) Example Fig 8.  This example has ODU1 -> ODU2 -> ODU3

I do not think the ODU1 TSG should be 1 (1.25/2.5G) since this ODU1 is not being advertised to support ODU0.  In this case, I think TSG=0 (Ignored).

2) Section 5.2.1, Fig 9. This example has ODU1 -> ODU2 -> ODU3.

This example doesn't show the advertisement of all ODU rates. Because of this, I would recommend changing the Sig Type = ODU2 instead of ODU1 in both SCSIs in Fig 9.  The reason is that it is the ODU2 (and perhaps the ODU3)  that would support the different TSG values depending on [RFC 4328] vs G.709-2012 with fallback disabled.

3) Section 5.5, Figure 13.

I believe the first Sig type=ODU2 (where #stages=1, stages=ODU4) should have the TSG = either 1 or 3.

Note that this example is not consistent in populating the TSG fields for all ODU rates. I would recommend explicitly showing the TSG values for all ODU rates as this provides useful information.

Best Regards,
Fred