Troubleshooting guide

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Release Notes for Cisco ONS 15454 Release 7.0.2
OL-11368-01
New Features and Functionality
Multiplexing Function
The muxponder is an integral part of the optically transparent ROADM network in which data payload
channels and wavelengths are processed exclusively at the optical level without electrical to optical
(E-O) conversion. The key function of the MXP_MP_10E_C and MXP_MP_10E_L cards is to multiplex
4 OC-48/STM16 signals onto one ITU-T G.709 OTU2 optical signal (DWDM transmission). The
multiplexing mechanism allows the signal to be terminated at a far-end node by another similar card.
Optical transparency on the muxponder is configured using OTUx and ODUx OH bytes. The ITU-T
G.709 specification defines OH byte formats that are used to configure, set, and monitor frame
alignment, FEC mode, section monitoring, tandem connection monitoring, and optical transparency.
The MXP_2.5G_10E and MXP_MP_10E_L cards perform ODU to OTU multiplexing as defined in
ITU-T G.709. The ODU is the framing structure and byte definition (ITU-T G.709 digital wrapper) used
to define the data payload coming into one of the SONET/SDH client interfaces on the cards. The term
ODU1 refers to an ODU that operates at 2.5-Gbps line rate. On the cards, there are four client interfaces
that can be defined using ODU1 framing structure and format by asserting a ITU-T G.709 digital
wrapper.
The output of the muxponder is a single 10-Gbps DWDM trunk interface defined using OTU2. It is
within the OTU2 framing structure that FEC or E-FEC information is appended to enable error checking
and correction.
The MXP_2.5G_10E_C and MXP_2.5G_10E_L cards are synchronized to the TCC2/TCC2P clock
during normal conditions and transmits the ITU-T G.709 frame using this clock.
The cards support Y-cable protection. Two cards can be joined in a Y-cable protection group with one
card assigned as the working card and the other defined as the protection card. This protection
mechanism provides redundant bidirectional paths.
You can configure the Forward Error correction for the cards in three modes: NO FEC, FEC, and E-FEC.
So, as client side traffic passes through the MXP_2.5G_10E_C or MXP_2.5G_10E_L card, it can be
digitally wrapped using FEC mode error correction or E-FEC mode error correction (or no error
correction at all).
For further card details, specifications, and functionality, see the Cisco ONS 15454 DWDM Installation
and Operations Guide.
New MXP_MR_2.5G and MXPP_MR_2.5G Muxponder Cards
The 2.5-Gbps Multirate Muxponder-100 GHz-Tunable 15xx.xx-15yy.yy (MXP_MR_2.5G) card
aggregates a mix and match of client Storage Area Network (SAN) service client inputs (GE, FICON,
Fibre Channel, and ESCON) into one 2.5 Gbps STM-16/OC-48 DWDM signal on the trunk side. It
provides one long-reach STM-16/OC-48 port per card and is compliant with Telcordia GR-253-CORE.
Note In Release 7.0.x, two additional operating modes are available: pure ESCON (all 8 ports running
ESCON), and Mixed mode (port 1 running FC/GE/FICON, and ports 5 through 8 running ESCON).
When the card is part of a node running Release 6.0 or below, only one operating mode, FC_GE mode,
is available for use.
The 2.5-Gbps Multirate Muxponder-Protected-100 GHz-Tunable 15xx.xx-15yy.yy (MXPP_MR_2.5G)
card aggregates various client SAN service client inputs (GE, FICON, Fibre Channel, and ESCON) into
one 2.5 Gbps STM-16/OC-48 DWDM signal on the trunk side. It provides two long-reach
STM-16/OC-48 ports per card and is compliant with ITU-T G.957 and Telcordia GR-253-CORE.