Loopback; Loopback-Detection Control Enable - 3Com S7906E Command Reference Manual

[Sysname] interface ethernet 2/0/1
[Sysname-Ethernet2/0/1] link-delay 8

loopback

Syntax
loopback { external | internal }
undo loopback
View
Ethernet interface view
Default Level
2: System level
Parameters
external: Enables external loopback testing on an Ethernet interface.
internal: Enables internal loopback testing on an Ethernet interface.
Description
Use the loopback command to enable Ethernet interface loopback testing.
Use the undo loopback command to disable Ethernet interface loopback testing.
By default, Ethernet interface loopback testing is disabled.
Ethernet interface loopback testing should be enabled while testing certain functionalities, such as
during the initial identification of any network failure.
While enabled, Ethernet interface loopback testing will work in full-duplex mode. The interface will
return to its original state upon completion of the loopback testing.
Examples
# Enable loopback testing on Ethernet 2/0/1.
<Sysname> system-view
[Sysname] interface ethernet 2/0/1
[Sysname-Ethernet2/0/1] loopback internal

loopback-detection control enable

Syntax
loopback-detection control enable
undo loopback-detection control enable
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