Junos OS Ethernet Interfaces Configuration Guide - Juniper Networks

Junos ®
OS 12.2 Ethernet Interfaces Configuration Guide
An overview of CFM is described starting in “IEEE 802.1ag OAM Connectivity Fault
Management Overview” on page 181, and you should further observe the additional
requirements described in this topic.
Table 23: Loss Threshold TLV Format
Parameter
Type=31
Length=12
OUI
Subtype
Value
Flag
230
Table 23 on page 230 shows the Loss Threshold TLV format.
Octet (sequence)
1
2
3
1
4
4
Description
Required. Required. If 0, no Length or Value fields follow. If not 0, at least
the Length field follows the Type field.
Required if the Type field is not 0. Not present if the Type field is 0. The
16 bits of the Length field indicate the size, in octets, of the Value field. 0
in the Length field indicates that there is no Value field.
Optional. Organization unique identifier (OUI), which is controlled by the
IEEE and is typically the first three bytes of a MAC address (Juniper OUI
0x009069).
Optional. Organizationally defined subtype.
Optional. Loss threshold value.
Optional. Bit0 (identifies an ISSU is in progress)
Bit1-31 (reserved)
Junos OS provides configuration support for the convey-loss-threshold statement, allowing
you to control the transmission of the loss threshold TLV in continuity check messages
PDUs. The convey-loss-threshold statement specifies that the loss threshold TLV must
be transmitted as part of the continuity check messages. If the convey-loss-threshold
statement is not specified, continuity check messages transmit this TLV only when a
unified ISSU is in progress. The Junos OS provides this configuration at the
continuity-check level. By default, continuity check messages do not include the loss
threshold TLV.
To configure the convey loss threshold, use the convey-loss-threshold statement at the
[edit protocols oam ethernet connectivity-fault-management maintenance-domain identifier
maintenance-association identifier continuity-check] hierarchy level.
For the remote MEP, the loss threshold TLV is transmitted only during the unified ISSU
if the convey-loss-threshold statement is not configured. The remote MEP switches back
to the default loss threshold if no loss threshold TLV is received or the TLV has a default
threshold value of 3.
An example of the configuration statements follows:
protocols {
oam {
ethernet {
connectivity-fault-management {
Copyright © 2012, Juniper Networks, Inc.