Installation guide

Configuring Cisco G.SHDSL HWICs in Cisco Access Routers
ima group clock-mode
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ima group clock-mode
To set the clock mode for an inverse multiplexing over ATM (IMA) group, use the ima group
clock-mode command in config controller DSL group mode. To disable the current configuration, use
the no form of this command.
ima group clock-mode {ctc | itc}
no ima group clock-mode
Syntax Description
Command Defaults ctc mode
Command Modes Config controller DSL group
Command History
Usage Guidelines This command controls the clock for the IMA group as a whole. If all the links in the group share a clock
source, use the ctc keyword. If all the links use different clock sources, use the itc keyword.
When the ctc keyword is set, the clock source ATM interface configuration command for the common
link determines clocking for all the links in the group.When the itc keyword is set, the clock source ATM
interface configuration command is used under each interface to determine clocking individually.
Because the system automatically chooses a replacement for the common link when it fails, any link in
an IMA group can potentially provide the recovered transmit clock. For this reason, even when the
common keyword is set with a specific link stipulated by the port value, you should use the ATM
interface configuration clock source command to make sure that the clock source is configured correctly
on each interface in the IMA group.
Examples The following example uses the ima group clock-mode command to configure the clock source for an
IMA group:
Router(config-controller-dsl-group)# ima group clock-mode ?
ctc Common Transmit Clock configuration
itc Independent Transmit Clock configuration
ctc Sets the transmit clocks for all the links in the IMA group to be derived from the same
source.
itc Sets the transmit clock source for at least one link in the IMA group to be different
from the clock source used by the other links.
Release Modification
12.4(15)T This command was introduced for the Cisco HWIC-4SHDSL and
HWIC-2SHDSL running on the Cisco 1841 router, and Cisco 2800 and
3800 series access routers.