Juniper JUNOSE 11.2.X PHYSICAL LAYER Configuration Manual page 138

JunosE 11.2.x Physical Layer Configuration Guide
controller sonet
description
path
116
— Stratum 3 or better, recovered either from a known good STM port or from one of
the BITS inputs.
Although the CLI enables you to specify the keywords internal module to use the line
module's internal clock, in a production network we recommend that you do not do
this. Instead, specify the keywords internal chassis to use the router's internal clock.
For production networks, never specify the keyword line to use the line's receive clock
as the transmit clock. Although the CLI enables this configuration, it is not supported
because jitter transfer is not compliant for this timing and because pointer adjustments
takes place on the outgoing link.
In a nonproduction network, you can configure some ports with internal clock sources
and others with line clock sources. However, all ports with internal clock sources must
use either the router's clock or the module's clock. You cannot configure some ports
on the I/O module to use the router's clock and others to use the module's clock.
To change the clock source of the ports on a cOC3/STM1 I/O module from the router's
clock to the module's clock or vice versa, first change the clock source of all ports to
the line setting, and then to the new internal clock setting.
Example
host1(config-controll)#clock source internal chassis
Use the no version to revert to the default, line.
See clock source.
Use to select an interface on which you want to configure channelized SONET or SDH.
Example
host1(config)#controller sonet 4/0
There is no no version.
See controller sonet.
Use to assign a text description or an alias to a channelized SONET interface.
You can use this command to help you identify the interface and keep track of interface
connections.
The description or alias can be a maximum of 64 characters.
Use the show controllers sonet command to display the text description.
Example
host1(config-controll)#description boston-sonet-interface
Use the no version to remove the text description or alias.
See description.
Copyright © 2010, Juniper Networks, Inc.