R3303-HP HSR6800 Routers Interface Configuration Guide

37
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable error packets diffusion
restraint.
error-diffusion restraint enable N/A
3. Configure error packets
diffusion restraint parameters.
error-diffusion restraint config
detect-timer renew-timer threshold
Optional.
By default, the detect-timer is 30
seconds, the renew-timer is 600
seconds, and the PER threshold is
20%.
Displaying and maintaining E1-F interfaces
Task Command Remarks
Display the configuration and
status of a specified or all E1-F
interfaces.
display fe1 [ serial interface-number ] [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Display the status of an E1-F
interface.
display interface serial interface-number [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Configuring a T1-F interface
T1-F interfaces, fractional T1 interfaces, are simplified CT1 interfaces. They are a cost-effective alternative
to CT1 interfaces where T1 access does not need multiple channel sets.
A T1-F interface operating in framed mode can bind timeslots into only one channel set. A CT1 interface
can group and bundle timeslots randomly into multiple channel sets.
A T1 line is multiplexed from 24 channels. A T1 primary group frame DS1 (digital signal level-1)
comprises 24 DS0 (64 kbps) timeslots and 1 framing bit for synchronization, with each timeslot being 8
bits. Each primary group frame has 193 bits (24 × 8+1). As DS1 can transmit 8000 frames per second,
its transmission speed is 1544 kbps (193 × 8 kbps).
A T1-F interface can only operate in framed mode. Timeslots 1 through 24 on it can randomly form a
channel set. The rate of the interface is n × 64 kbps or n × 56 kbps and its logical features are the same
as those of a synchronous serial interface where you can configure PPP, HDLC, and FR at the data link
layer and IP at the network layer.
To configure a T1-F interface:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter T1-F interface view.
interface serial interface-number N/A