R0106-HP MSR Router Series Interface Configuration Guide(V7)

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Step Command Remarks
7. (Optional.) Set the clock mode.
• For the CE3 interface:
clock { master | slave }
• For an E1 line:
e1 line-number set clock
{ master | slave }
The default mode for both the CE3
interface and E1 line is slave,
which is line clock.
8. (Optional.) Set the national bit.
national-bit { 0 | 1 } The default is 1.
9. (Optional.) Enable loopback.
• For the CE3 interface:
loopback { local | payload |
remote }
• For an E1 line:
e1 line-number set loopback
{ local | remote | payload }
By default, loopback is disabled.
10. Set E1 framing format on an E1
line.
e1 line-number set frame-format
{ crc4 | no-crc4 }
The default is no-crc4.
11. (Optional.) Restore the default
settings for the CE3 interface.
default N/A
12. Bring up the CE3 interface and
an E1 line on the interface.
• Bring up the CE3 interface:
undo shutdown
• Bring up an E1 line on the CE3
interface
undo e1 line-number shutdown
By default, a CE3 interface is up.
By default, a T1 line is up.
13. Return to system view.
quit N/A
14. Enter synchronous serial
interface view of an interface
formed by a CE3 interfaces.
• interface serial
number/line-number:0
• interface serial
number/line-number:set-numb
er
N/A
15. Set the CRC mode.
crc { 16 | 32 | none } By default, 16-bit CRC is adopted.
Displaying and maintaining CE3 interfaces
Execute display commands in any view and reset commands in user view.
Task Command
Display CE3 interface information. display controller e3 [ interface-number ]
Display the configuration and state of a serial interface
formed on a CE3 interface.
display interface serial interface-number
Clear statistics for CE3 interfaces. reset counters controller e3 [ interface-number ]
Configuring a CT3 interface
Both T3 and T1 belong to the T-carrier system promoted by ANSI. T3 uses the digital signal level DS-3
and operates at 44.736 Mbps.
CT3 interfaces support two operating modes: T3 (unchannelized) and CT3 (channelized).