H3C Technologies H3C S5120 Series Switches - Manual (Page 544)

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For the purpose of the stability of an interface index, the system will save the 16-bit interface index when
a logical interface is removed.
If you repeatedly 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 used in
the current system
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 1-1 . They can
be further divided into optical transceivers and electrical transceivers based on transmission medium.
Table 1-1 Commonly used pluggable transceivers
Transceiver type
Application
environment
Whether can be an
optical transceiver
Whether can be an
electrical transceiver
SFP (Small
Form-factor
Pluggable)
Generally used for
100M/1000M Ethernet
interfaces or POS
155M/622M/2.5G
interfaces
Yes Yes
GBIC (Gigabit
Interface Converter)
Generally used for
1000M Ethernet
interfaces
Yes Yes
XFP (10-Gigabit small
Form-factor
Pluggable) Generally used for
10G Ethernet
interfaces
Yes No
XENPAK (10-Gigabit
Ethernet Transceiver
Package) Generally used for
10G Ethernet
interfaces
Yes Yes