SMC Networks SMC7816M, SMC7816VSW E, C, 29-29, lre noise-mgn min

L ONG -R EACH E THERNET C OMMANDS
29-29
lre noise-mgn min
This command configures the minimum acceptable signal-to-noise margin.
Use the no form to restore the default setting.
Syntax
lre noise-mgn min {down | up} value
no lre noise-mgn min {down | up}
•down – Downstream bands.
•up – Upstream bands.
•value – Signal-to-noise margin. (Range: 0-62, in units of 0.5 dB)
Default Setting
10 dB
Command Mode
Interface Configuration (VDSL Port)
Command Usage
• This command sets the minimum noise margin the receiver can
tolerate. If the noise margin falls below this level, the receiver will ask
the sender to increase its transmit power. If it is not possible to
increase the transmit power, a loss-of-margin defect occurs, the link
will fail and the receiver will attempt to re-initialize.
• When rate adaptation is enabled (see Command Usage, page29-32),
the signal-to-noise ratio (SNR) is an indicator of link quality. The
switch itself has no internal functions to ensure link quality. To ensure
a stable link, you should add a margin to the theoretical minimum
signal-to-noise ratio (SNR).
Example
The following sets the minimum noise margin on port 1 to 14 dB.
Related Commands
lre noise-mgn target (29-28)
Console(config)#interface ethernet 1/1
Console(config-if)#lre noise-mgn min down 28
Console(config-if)#