H3C Technologies H3C S12500-X Series Switches - Manual (Page 194)

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Configuring service loopback groups
A service loopback group contains one or multiple Ethernet ports for looping packets sent out by the
device back to the device. This feature must work with other features, such as GRE.
The device supports only one service loopback group. This group provides services only for unicast tunnel
traffic. You can use the service loopback group with multiple features.
Member ports in a service loopback group are load balanced.
Configuration procedure
Follow these guidelines when you configure the service loopback group:
• Make sure the ports you are assigning to the service loopback group meet the following
requirements:
{
The ports are not used for any other purposes. The configuration on a port is removed when it
is assigned to the service loopback group.
{
The ports support the service type of the service loopback group.
• For correct traffic processing, follow these guidelines
{
Make sure the service loopback group has at least one member port when it is being used by
a feature.
{
Do not delete the service loopback group when it is being used by a feature.
To configure the service loopback group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create the service loopback
group and specify its service
type.
service-loopback group number
type tunnel
N/A
3. Enter Layer 2 Ethernet
interface view. interface interface-type
interface-number
N/A
4. Assign the port to the service
loopback group. port service-loopback group
number By default, the service loopback
group do not contain ports.
Displaying and maintaining service loopback
groups
Execute display commands in any view.