Configuring Cisco Multimode G.SHDSL EFM/ATM in Cisco ISR G2
efm-grp link-stability-timer
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Configuring Cisco Multimode G.SHDSL EFM/ATM in Cisco ISR G2
efm-grp link-stability-timer
To configure the data transmission delay period for links in an Ethernet in the First Mile Bonding
(EFM-Bonding) group, use the
efm-grp link-stability-timer
command in the configuration controller
DSL group mode.
efm-grp link-stability-timer
seconds
Syntax Description
Command Default
None
Command Modes
Configuration controller DSL group (config-controller-dsl-group)
Command History
Usage Guidelines
The link stability timer is supported only on Customer Premise Equipment (CPE) for interoperability
with Digital Subscriber Line Access Multiplexers (DSLAMs), such as Overture HN4000, that support
data transmission delay of a few seconds to dampen out unstable links in scenarios where demanding
circumstances, such as lightning, long multirepeater spans, and so on, prevail. The link stability timer
introduces a data transmission delay in the user-configured value after the links are in the UP_DATA
mode in order to achieve a stable SYNC status with the DSLAM.
The Link Stability feature enables interoperability with the Overture DSLAM. After a 2 bpme
(BASE-TL PME) reaches the data mode, the HN4000 (Overture DSLAM) waits for approximately 13
seconds before checking for the 64/65 lock. Due to this, whenever a link is added to an existing bonding
group, network traffic stops completely for about 13 seconds. Hence, the optimal link stability value for
the Overture DSLAM is set at 13 seconds to avoid packet drops in the DSLAM.
For other DSLAMs that do not exhibit this behavior, the link stability duration can be set to 0 seconds,
the default value during the termination at the CPE.
Examples
The following example shows how to use the
efm-grp link-stability-timer
command:
Router(config-controller-dsl-group)#
efm-grp link-stability-timer ?
<0-60> timeout period in seconds
Router(config-controller-dsl-group)#
efm-grp link-stability-timer 13
Running Configuration
controller SHDSL 0/1/0
seconds
Data transmission delay, in seconds. The range is from 0 to 60. The
default is 0.
Release
Modification
15.3(2)T
This command was introduced.