R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Configuration Guide

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Configuring service loopback groups
The service loopback group is a logical group of one or more Ethernet ports that are used to loop packets
that are sent out by the device back to the device. This feature must work with other features, such as GRE.
A service loopback group provides one of the following services:
• Tunnel—Supports unicast tunnel traffic.
• Multicast tunnel—Supports multicast tunnel traffic.
For each service type, the device supports only one service loopback group. However, you can use a
service loopback group with multiple features.
Member ports in a service loopback group are load balanced.
Configuration procedure
Follow these guidelines when you configure a service loopback group:
• Make sure the ports you are assigning to a service loopback group meet the following
requirements:
{ The ports are not used for forwarding or any other purposes. The configuration on a port is
removed when it is assigned to a service loopback group.
{ The ports support the service type of the service loopback group and are not members of any
other service loopback group.
• You cannot change the service type of a service loopback group.
• To ensure correct traffic handling, make sure a service loopback group has at least one member
port when it is being used by a feature.
To configure a service loopback group:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Create a service loopback
group and specify its service
type.
service-loopback group number
type { multicast-tunnel | tunnel } *
N/A
3. Enter Layer 2 Ethernet
interface view.
interface interface-type
interface-number
N/A
4. Assign the port to a service
loopback group.
port service-loopback group
number
By default, a port does not belong
to any service loopback group.
You can assign up to 16 ports to a
service loopback group.