RFC Errata
RFC 4842, "Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation over Packet (CEP)", April 2007
Source of RFC: pwe3 (int)See Also: RFC 4842 w/ inline errata
Errata ID: 1064
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2007-05-17
Section 11.2.1.1 says:
The 28 bits of the EBM are divided into groups of 4 bits, each corresponding to a different VTG within the STS container. All 4 bits are used to indicate whether VT1.5 (T1) tributaries are carried within a VTG. The first 3 bits read from right to left are used to indicate whether VT2 (E1) tributaries are carried within a VTG. The first 2 bits are used to indicate whether VT3 (DS1C) tributaries are carried within a VTG.
It should say:
The 28 bits of the EBM are divided into groups of 4 bits, each corresponding to a different VTG within the STS container. All 4 bits are used to indicate whether VT1.5 (T1) tributaries are carried within a VTG. The 3 rightmost bits in a bit group are used to indicate whether VT2 (E1) tributaries are carried within a VTG. The 2 rightmost bits in a bit group are used to indicate whether VT3 (DS1C) tributaries are carried within a VTG.
Notes:
Replaced 'first 3 bits read from right to left' with '3 rightmost
bits' and similarly 'first 2 bits' with '2 rightmost bits'. The
new text avoids possible confusion with regards to the position
of the relevant bits.
from pending