Hi, I have been selected as the Routing Directorate QA reviewer for this draft. Document: draft-ietf-rtgwg-spf-uloop-pb-statement-03.txt Reviewer: Tomonori Takeda Review Date: April 29, 2017 Intended Status: Standards Track Here are my comments. Overall, the document is well organized and clear about problem statement and analysis of SPF triggers and SPF delays impact on micro-loops. Some specific comments. 1) The document is intended to be Standards Track. I do not think it is common for such analysis document to be Standards Track. 2) Just a nits, but in page 12, it says "In the figure 5", but it seems figures are not numbered. 3) In Section 4.2. Exponential backoff, it is not clear what is a condition (or conditions) to move from FM to BM. Thanks, Tomonori Takeda