Slr Pdu Format; Data Iterator Tlv Format - Juniper ACX1000 Configuration Manual

SLR PDU Format

Data Iterator TLV Format

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Copyright © 2017, Juniper Networks, Inc.
Chapter 34: Configuring Operations, Administration, and Management (OAM)
The synthetic loss reply (SLR) PDU format is used by a MEP to transmit SLR information.
The following are the fields in an SLR PDU:
MEG Level—A 3-bit field the value of which is copied from the last received SLM PDU.
Version—A 5-bit field the value of which is copied from the last received SLM PDU.
OpCode—Identifies an OAM PDU type. For SLR, it is set as 54.
Flags—A 1-octet field copied from the SLM PDU.
TLV Offset—A 1-octet field copied from the SLM PDU.
Source MEP ID—A 2-octet field copied from the SLM PDU.
Responder MEP ID—A 2-octet field used to identify the MEP transmitting the SLR
frame.
Test ID—A 4-octet field copied from the SLM PDU.
TxFCf—A 4-octet field copied from the SLM PDU.
TxFCb—A 4 octet field. This value represents the number of SLR frames transmitted
for this test ID.
Optional TLV—The value is copied from the SLM PDU, if present.
End TLV—A 1-octet field copied from the SLM PDU.
The data iterator TLV specifies the data TLV portion of the Y.1731 data frame. The MEP
uses a data TLV when the MEP is configured to measure delay and delay variation for
different frame sizes. The following are the fields in a data TLV:
Type—Identifies the TLV type; value for this TLV type is Data (3).
Length—Identifies the size, in octets, of the Value field containing the data pattern.
The maximum value of the Length field is 1440.
Data pattern—An n-octet (n denotes length) arbitrary bit pattern. The receiver ignores
it.
Ethernet Synthetic Loss Measurement Overview on page 1140
Transmission of ETH-SLM Messages on page 1141
Guidelines for Configuring ETH-SLM on page 1146
Scenarios for Configuration of ETH-SLM on page 1147
Managing ETH-SLM Statistics and ETH-SLM Frame Counts on page 1148
Starting a Proactive ETH-SLM Session on page 1153
Starting an On-Demand ETH-SLM Session on page 1156
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