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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.
A service loopback group provides one of the following services:
• Tunnel—Supports unicast tunnel traffic.
• Multicast tunnel—Supports multicast tunnel traffic.
• Multiport—Supports multiport ARP traffic.
• VSI gateway—Supports VSI gateway traffic.
You can configure only one service loopback group for a service type. However, you can use one
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 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.
• Do not delete a service loopback group that is being used by a feature.
• To avoid IRF split, do not assign a physical interface to a service loopback group if that interface
is the only member interface of an IRF port.
• For correct traffic processing, make sure a service loopback group has a minimum of one
member port when it is being used by a feature.
To configure a service loopback group:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create a service loopback
group and specify its service
type.
service-loopback group
group-id
type
{ {
multicast-tunnel
|
tunnel
} *
|
multiport
|
vsi-gateway
}
By default, no service
loopback groups exist.
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
group-id
By default, a port does not
belong to any service loopback
group.
You can assign a maximum of
32 ports to a service loopback
group.
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