Command Line Reference Guide

SONET | 1317
Defaults
Not configured
Command Modes
CONFIGURATION
Example FTOS(conf)#interface sonet 8/2
FTOS(conf-if-so-8/2)#
Usage
Information
You cannot delete POS/SDH interfaces. By default, POS/SDH interfaces are disabled (shutdown). Use
the encap command to enable encapsulation on the interface.
Related
Commands
keepalive
e
Send SONET keepalive packets periodically to keep an interface alive when it is not transmitting data.
Syntax
keepalive [seconds]
To stop sending SONET keepalive packets, enter no keepalive.
Parameters
Defaults
Enabled.
Command Modes
INTERFACE
Usage
Information
When you configure keepalive, the system sends a self-addressed packet out of the configured
interface to verify that the far end of a WAN link is up. When you configure no keepalive, the system
does not send keepalive packets and so the local end of a WAN link remains up even if the remote end
is down.
loopback
e
Troubleshoot a POS/SDH interface by looping back traffic through the interface or the line.
Syntax
loopback {internal | line}
To delete a loopback setting, use the no loopback {internal | line} command.
Parameters
Defaults
Not configured.
encap Configure PPP encapsulation.
seconds
(OPTIONAL) For POS/SDH interfaces with encapsulation enabled, enter the number of
seconds between keepalive packets.
Range: 0 to 32767
Default: 10 seconds
internal Enter the keyword internal to test the physical interface by sending incoming traffic back
through the interface.
line Enter the keyword line to test connectivity to the network by sending incoming traffic back
to the network.