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scramble
Configuring an HDLC Channel
You must configure an HDLC channel for each T3 frame or E3 frame controller.
To configure an HDLC channel, configure a serial interface (for example, HDLC
channel in slot 0, 1).
Optional Tasks
The following configuration tasks are optional when you configure an HDLC channel
on a T3/E3 frame interface:
crc
host1(config-controll)#dsu mode 0
Use the no version to clear the DSU mode.
If you issue the no version, be sure to issue the no dsu bandwidth and no
scramble commands. Otherwise, the interface might drop packets unexpectedly.
See dsu mode.
Use to enable cell scrambling on a T3 frame interface.
If you issue this command, be sure to issue the dsu mode and dsu bandwidth
commands. Otherwise, the interface might drop packets unexpectedly.
Example
host1(config-controll)#scramble
Use the no version to turn off cell scrambling on the interface.
If you issue the no version, be sure to issue the no dsu mode and no dsu
bandwidth commands. Otherwise, the interface might drop packets
unexpectedly.
See scramble.
host1(config)#interface serial 0/1
Configure the cyclic redundancy check (CRC).
Configure the HDLC idle character.
Enable data inversion on the interface.
Set the time interval for monitoring bit and packet rates.
Set the maximum receive unit (MRU).
Set the maximum transmit unit (MTU).
Assign a text description or an alias to the serial interface.
Chapter 2: Configuring T3 and E3 Interfaces
Configuration Tasks
57
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