<div dir="ltr"><div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Hi,</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Below is my summary of the Working Group Last Call comments on draft-ietf-trill-prob-04.txt.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">General:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There appears to be a rough consensus that the draft is excessively critical of spanning tree and this should be corrected in several places.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Abstract:</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There were a number of complaints about the abstract; however the abstract is reasonably consistent with the body. Rather than considering such complaints twice, any problems with the body should be fixed and then the abstract adjusted to be consistent with the revised body.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Introduction:</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Comments in the draft concerning spanning tree slow convergence need, at a minimum, to be qualified to indicate they generally do not apply to RSTP.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 2:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There were complaints when 802.1Q was referenced, saying that previous amendment that were incorporated such as 802.1s should be referenced instead. And there were complaints when amendments such as 802.1s were referenced in other parts of the document saying that they no longer exist and no amendments that have been rolled into the 802.1Q base document should be mentioned separately.</p>
</div><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><span class="Apple-style-span" style="font-family: Arial; ">In the normal case, when not otherwise qualified, "802.1Q" should refer to the current IEEE 802.1Q standard at the time this draft is published and as specified in the References section; however, there is no particular harm in referring to earlier amendments that have been rolled into 802.1Q as long as their status is mentioned.</span><br>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 2.1:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There was one comment that thicknet, thinnet, and hubs should not be mentioned because they no longer exist but the reference to them is historical and there are still hubs, at least, in use.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 2.2:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There is a statement in the draft intended to compare ECMP link-state with non-ECMP link state which may appear to be a comparison between ECMP link-state with STP. This should be clarified.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 2.3:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">The referenced paper (reference [5] in the draft) contains serious errors and should probably not be referenced. But, as Francois Tallet said, "RSTP can indeed suffer from the usual count to infinity issue specific to distance vector protocols that can delay the convergence by few seconds."</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 2.5:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">That there are actually 65 trees available with MSTP and that each is used for forwarding a non-overlapping set of VLANs should be clarified.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 3.3:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">There was one comment that there are no transient loops in Spanning Tree. This is incorrect. Transient loops, however unlikely, are possible with Spanning Tree.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Section 3.4:</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">One missing reference.</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Thanks,</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">Donald (co-chair)</p>
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