RFC 6571, "Loop-Free Alternate (LFA) Applicability in Service Provider (SP) Networks", June 2012Source of RFC: rtgwg (rtg)
Errata ID: 3561
Publication Format(s) : TEXT
Reported By: Ciril Rozic
Date Reported: 2013-03-20
Rejected by: Stewart Bryant
Date Rejected: 2013-05-06
Section 188.8.131.52 says:
The LFA to P is via C2, because c < d + u. It is node-protecting if eq2: x + e < x + c, i.e., if e < c.
It should say:
The LFA to P is via C2 if x + e < d + u + x. It is node-protecting if eq2: x + e < c + x, i.e., if e < c.
The condition for the first sentence e < d + u is not stated in the assumptions in Section 3.
The second sentence is not incorrect, but "c + x" is more consistent with eq1 in Section 2.
The assumption that c < d + u is stated in section 3.0 (bullet 10) as a design assumption.