Reference Guide

SONET | 1387
down-when-looped
e
Set the interface to send a system message when it detects a loopback condition and goes down.
Syntax
down-when-looped
To disable notification, enter no down-when-looped.
Defaults
Enabled
Command Modes
INTERFACE
encap
e
Configure encapsulation for a PPP interface.
Syntax
encap ppp
To remove encapsulation, enter no encap.
Parameters
Defaults
Not configured.
Command Modes
INTERFACE
Usage
Information
When you enter the no encap command, you administratively shutdown the interface and
configuration information (such as IP address) is deleted from the interface. A SONET interface
without encapsulation is always operationally down.
When you enable encapsulation on the interface, PPP negotiation begins after you enable the interface
(no shutdown command). You can enable authentication and other related commands once negotiation
is completed.
flag
e
Set the overhead bytes in the frame header to ensure interoperability between different vendor
equipment.
Syntax
flag {c2 | j0} value
To return to the default value, use no flag {c2 | j0} command.
ppp Enter the keyword ppp for Point-to-Point Protocol encapsulation.
Note: Encapsulation must be configured before the interface is enabled for traffic.