quality-level (Clock Synchronization)
Syntax
quality-level (prc | prs | sec | smc | ssu-a | ssu-b | st2 | st3 | st3e | st4 | stu | tnc);
Hierarchy Level
[edit chassis synchronization source interfaces (external-a | external-b | interface interface-name)] [edit chassis synchronization source interfaces (external | interface interface-name)] [edit chassis synchronization source interfaces (external-0/0 | external-1/0 | interface interface-name)]
Description
Configure the quality level for a timing source so that the router knows the best available source with which to synchronize. The quality level specifies the accuracy level of the clock and is transmitted across the network through Synchronization Status Messages (SSMs) over the Ethernet Synchronization Messaging Channel (ESMC), or through SSMs contained in SONET/SDH frames.
SONET SSM messages are either Generation 1 or Generation 2. Generation 1 is the first and most widely deployed SSM message set. Generation 2 is a newer version. Quality level options are available for both Generation 1 and Generation 2.
Options
prs—Primary reference source—Stratum 1
st2—Stratum 2
tnc—Transit node clock
st3e—Stratum 3E
st3—Stratum 3
smc—SONET minimum clock
st4—Stratum 4
prc—Primary reference clock
ssu-a—Synchronization supply unit A
ssu-b—Synchronization supply unit B
sec—SDH equipment clock
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 11.2R4.