3Com 4210G Series, Configuration Manual, Page: 892 / 1133

10-7
To do… Use the command… Remarks
Enter system view
system-view
—
Configure a detection interval
shutdown-interval time
Optional
The detection interval is 30
seconds by default.
Clearing the 16-bit Interface Indexes Not Used in the Current
System
In practical networks, the network management software requires the device to provide a uniform,
stable 16-bit interface index. That is, a one-to-one relationship should be kept between the interface
name and the interface index in the same device.
For the purpose of the stability of an interface index, the system will save the 16-bit interface index
when a board or logical interface is removed.
If you repeatedly insert and remove different subboards to create or delete a large number of logical
interfaces, the interface indexes will be used up, which will result in interface creation failures. To avoid
such a case, you can clear all 16-bit interface indexes saved but not used in the current system in user
view.
After the above operation,
z
For a re-created interface, the new interface index may not be consistent with the original one.
z
For existing interfaces, their interface indexes remain unchanged.
Follow these steps to clear the 16-bit interface indexes not used in the current system:
To do… Use the command… Remarks
Clear the 16-bit interface
indexes saved but not in use in
the current systems of all
member devices
reset unused porttag
Required
Available in user view
A confirmation is required when you execute this command. If you fail to make a confirmation within 30
seconds or enter
N
to cancel the operation, the command will not be executed.
Identifying and Diagnosing Pluggable Transceivers
Introduction to pluggable transceivers
At present, four types of pluggable transceivers are commonly used, as shown in Table 10-1 . They can
be further divided into optical transceivers and electrical transceivers based on transmission medium.