ethernet loopback
Ethernet loopback is not enabled on a port.
Interface configuration mode
The Ethernet loopback functionality on a port in the VLAN-unaware mode can be configured either as flow-aware or flow-unaware. The specified port does not need to be explicitly assigned as a member of any VLAN.
To enable Ethernet loopback on a port in the
VLAN-unaware mode as flow-aware, the ethernet loopback
test-mac command must be executed before enabling the Ethernet
loopback.
To add or delete a port from VLAN, the VLAN unaware ethernet loopback configuration on the port must be removed.
Before adding or deleting a port form VLAN, the VLAN unaware ethernet configuration must be removed, if configured.
The
ethernet loopback
command is not supported on multiple ports (MIF) mode.
The
no
form of the command disables the Ethernet loopback functionality on the specified
port.
The following example configures Ethernet loopback on a specific port in the VLAN-unaware mode as flow-unaware.
device(config)# interface ethernet 1/1/1 device(config-if-e1000-1/1/1)# ethernet loopback
The following example configures Ethernet loopback in VLAN-unaware mode as flow-aware.
device# configure terminal device(config)# interface ethernet 1/1/1 device(config-if-e1000-1/1/1)# ethernet loopback test-mac 1111.2222.3333 4444.5555.5555 device(config-if-e1000-1/1/1)# ethernet loopback
The following example shows the error which occurs when you try to add a port to VLAN, without removing the VLAN unaware ethernet loopback configuration.
bkes_oct14-16_DND(config-if-e1000-3/1/4)#vlan 10 bkes_oct14-16_DND(config-vlan-10)#tag eth 3/1/4 Error: Port 3/1/4 has Ethernet loopback configuration Note: Remove Ethernet loopback from port 3/1/4 and then add port as member of VLAN 10 bkes_oct14-16_DND(config-vlan-10)#int eth 3/1/4
| Release version | Command history |
|---|---|
| 08.0.30 | This command was introduced. |