170
C
HAPTER
3: I
NTERFACE
M
ANAGEMENT
C
OMMANDS
By default, the interface is disabled to perform loopback in any form.
Loopback is used to check the condition of interface or cable. This function should
be disabled when they are in normal operation.
If a serial interface formed by bundling timeslots of the CT1/PRI interface is
encapsulated with PPP and is set to perform loopback, it is normal for the state of
the link layer protocol to be reported as DOWN.
Example
Set the interface E1 3/0/0 to perform local loopback.
[3com-E1 3/0/0]loopback local
pri-set
Syntax
pri-set timeslot-list [ range ]
undo pri-set
View
CE1/PRI interface view
Parameter
range: The number of the timeslots that are bundled, which is in the range of 1 to
31. When specifying the timeslots to be bundled, you can specify a single timeslot
by specifying a number, a range of timeslots by specifying a range between
number1-number2, or several discrete timeslots by specifying number1,
number2-number3.
Description
Using the pri-set command, you can bundle the timeslots of a CE1/PRI interface
into a pri-set. Using the undo pri-set command, you can remove the timeslot
bundle.
By default, no timeslots are bundled into pri-set.
When perform pri-set bundling on a CE1/PRI interface, you should note that you
are not allowed to bundle only timeslot 16, as it will be used as the D channel for
transmitting signals. Attempts to bundle only timeslot 16 will fail.
In a pri-set formed by bundling the timeslots of a CE1/PRI interface, timeslot 0 is
used for Frame Synchronization Control (FSC), timeslot 16 as a D channel for
signaling transmission, and other timeslots as B channels for data transmission.
You may bundle the timeslots except for timeslot 0 into a pri-set (as the D channel,
timeslot 16 is automatically bundled). The logic features of this pri-set will be the
same like those of an ISDN PRI interface. If no timeslots are specified for bundling,
all the timeslots except for timeslot 0 will be bundled into an interface similar to an
ISDN PRI interface in the form of 30B+D.
Содержание Router 3031
Страница 6: ......
Страница 396: ...396 CHAPTER 4 LINK LAYER PROTOCOL Example Set the parameter of X 29 to 10 seconds 3Com x29 timer inviteclear time 10...
Страница 686: ...686 CHAPTER 6 ROUTING PROTOCOL...
Страница 758: ...758 CHAPTER 7 MULTICAST COMMON CONFIGURATION COMMANDS...