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clock source
Selects the clock source for data transmission.
Syntax: clock source {line | internal}
no clock source
line
Selects the clock extracted from the received data stream for data transmission from this interface.
internal
Selects the internal clock of the interface for data transmissions from this interface.
Description: An interface can clock transmitted data from either its own internal clock (internal) or from a clock extracted from the incoming data stream (line).
Be aware that the default for industry-standard routers is to obtain their clock from line. If both ends of the fiber are configured to recover the clock from line, the connection does not work, characterized by SONET failing to come up.
NOTE Be sure to include the clock source internal command in your configuration file when configuring the Avici router to interoperate with industry-standard routers.
Use the shutdown command to disable the interface before modifying the clock source.
Use the clock source line command to select the clock extracted from the receive data stream as the clock for data transmission on this interface.
Use the clock source internal command to select the internal clock as the clock for data transmission on this interface.
Use the no clock source command to set the clock source to the default value (line).
Factory Default: Line.
Command Mode: Interface configuration.
Example: In the following example, the clock source command selects the internal clock (internal) as the clock for data transmission, and the show running-config command displays the new setting:
router(config)#interface pos 1/1/1
router(config-if)#shutdown
router(config-if)#clock source internal
router(config-if)#end
router#show running-config
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module 1/1 4xoc3c
shutdown
interface pos 1/1/1
clock source internal
ip address 3.3.3.2 255.255.255.0
mtu 4400
ppp negotiation-timeout 30
no shutdown
.
.
.
Related Commands: show interface ethernet
show interface pos
shutdown
show running-config
show startup-config
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Copyright © 2005
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
Source
File Name: SONET.fm
HTML File Name: SONET3.html
Last Updated: 02/25/05 at 14:29:54