Chapter 19: Alarm Management and Troubleshooting (CLI)
Performing Diagnostics (CLI)
phn-3963_008v000
Page 19-14
To configure the loopback duration time, go to interface view for the interface and enter the following command:
eth type eth[x/x]> loopback set duration <loopback-duration>
You can select whether to swap DA and SA MAC addresses during the loopback. Swapping addresses prevents
Ethernet loops from occurring. It is recommended to enable MAC address swapping if LLDP is enabled.
To configure MAC address swapping, go to interface view for the interface and enter the following command:
eth type eth[x/x]> loopback swap-mac-address admin <MAC_swap-admin-state>
To view loopback status, go to interface view for the interface and enter the following command:
eth type eth[x/x]> loopback status show
Table 179
Ethernet Loopback CLI Parameters
Parameter
Input Type
Permitted Values
Description
loopback-
admin-state
Variable
enable
disable
Enter
enable
to enable Ethernet
loopback on the interface, or
disable
to
disable Ethernet loopback on the
interface.
loopback-
duration
Number
1 - 900
The loopback duration time, in seconds.
MAC_swap-
admin-state
Variable
enable
disable
Enter
enable
to enable MAC address
swapping, or
disable
to disable MAC
address swapping.
Examples
The following command enables Ethernet loopback on Ethernet interface 2.
eth type eth [1/2]> loopback admin enable
The following command sets the loopback duration time to 900 seconds.
eth type eth [1/2]> loopback set duration 900
The following command enables MAC address swapping during the loopback.
eth type eth [1/2]> loopback swap-mac-address admin enable
The following command displays Ethernet port loopback status.
eth type eth [1/2]> loopback status show
Configuring Service OAM (SOAM) Fault Management (FM)
(CLI)
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