Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 643

To return to the default 16-bit frame checksum, delete the
the configuration:
To explicitly configure a 16-bit checksum, include the
interfaces interface-name e3-options]
Configuring the E3 Idle Cycle Flag
By default, an E3 interface transmits the value 0x7E in the idle cycles. To have the
interface transmit the value 0xFF (all ones) instead, include the
at the
option:
To explicitly configure the default value of 0x7E, include the
with the
Configuring E3 Data Inversion
By default, data inversion is disabled. To enable data inversion at the HDLC level,
include the
hierarchy level:
When you enable data inversion, unused data bits in the data stream are transmitted
inverted; that is, zeroes are transmitted as ones and ones as zeroes. Enable inversion
to be compatible with another vendor s E3 interface.
Configuring E3 Loopback Capability
You can configure loopback capability between the local E3 interface and the remote
CSU. You can configure the loopback to be local or remote. With local loopback, the
E3 interface can transmit packets to the CSU, but receives its own transmission back
again and ignores data from the CSU. With remote loopback, packets sent from the
CSU are received by the E3 interface, forwarded if there is a valid route, and
immediately retransmitted to the CSU (see Figure 55 on page 574).
[edit interfaces interface-name e3-options]
fcs 32;
[edit]
user@host# delete interfaces e3-fpc/pic/port e3-options fcs 32
[edit interfaces interface-name e3-options]
fcs 16;
[edit interfaces interface-name e3-options]
[edit interfaces interface-name e3-options]
idle-cycle-flag ones;
option:
flags
[edit interfaces interface-name e3-options]
idle-cycle-flag flags;
statement at the
invert-data
[edit interfaces interface-name e3-options]
invert-data;
Chapter 30: Configuring E3 Interfaces
fcs 32
fcs statement at the
hierarchy level:
idle-cycle-flag
hierarchy level, specifying the
idle-cycle-flag
[edit interfaces interface-name e3-options]
Configuring the E3 Idle Cycle Flag
statement from
[edit
statement
ones
statement
573