R3303-HP HSR6800 Routers Interface Configuration Guide

36
Step Command Remarks
5. Set the clock mode.
fe1 clock { master | slave }
Optional.
The default is slave, which is line
clock.
6. Enable automatic clock mode
change.
clock-change auto
Optional.
Disabled by default.
7. Set the cable type.
fe1 cable { long | short }
Optional.
The long keyword applies by
default.
8. Configure the CRC mode.
crc { 16 | 32 | none }
Optional.
16-bit CRC by default.
9. Enable AIS test.
fe1 detect-ais
Optional.
By default, AIS test is performed.
10. Set the framing format.
fe1 frame-format { crc4 | no-crc4 }
Optional.
The default is no-CRC4.
11. Set the line idle code type.
fe1 idlecode { 7e | ff }
Optional.
The default is 0x7E.
12. Set the interframe filling tag
type.
fe1 itf type { 7e | ff }
Optional.
The default is 0x7E.
13. Set the number of interframe
filling tags.
fe1 itf number number
Optional.
The default is 4.
14. Enable loopback and set the
loopback mode.
fe1 loopback { local | payload |
remote }
Optional.
Loopback is disabled by default.
15. Enable user data reversion.
fe1 data-coding { inverted |
normal }
Optional.
Disabled by default.
16. Set the intended bandwidth
for the E1-F interface.
bandwidth bandwidth-value Optional.
17. Shut down the E1-F interface.
shutdown
Optional.
An E1-F interface is up by default.
Configuring error packets diffusion restraint
Error packets diffusion occurs when the error packet received on one timeslot spreads to other timeslots.
You can suppress error packet diffusion by configuring three parameters: detection period (detect-timer),
renew-timer (renew-timer), and PER threshold (threshold).
If the packet error rate for the detection period exceeds the PER threshold, the interface automatically
shuts down to avoid the risk of error packets diffusion. At the same time, the renew timer starts. When the
timer expires, the interface automatically comes up.
To configure error packets diffusion restraint: