Service Loopback Group Configuration; Service Types Of Service Loopback Groups; Requirements On Service Loopback Ports; States Of Service Loopback Ports - HP 5820X series Configuration Manual

Service loopback group configuration

The service loopback function is implemented through service loopback groups. A service loopback
group must contain at least one Ethernet port as its member port, called a service loopback port. To
increase service redirecting throughput, you can assign multiple service loopback ports to a service
loopback group. Similar to the Ethernet link aggregation function, a service loopback group can increase
bandwidth and implement load sharing. For more information about Ethernet link aggregation, see the
chapter "Ethernet link aggregation configuration."
For example, by assigning three ports of the same device to a service loopback group, you can create a
logical link whose bandwidth can be as high as the total bandwidth of these three ports. In addition,
service traffic is load-balanced among these ports.

Service types of service loopback groups

Service loopback groups provide the following service types:
IPv6, supporting IPv6 unicast traffic
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IPv6 multicast, supporting IPv6 multicast traffic
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Tunnel, supporting unicast tunnel traffic
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Multicast tunnel, supporting multicast tunnel traffic
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MPLS, supporting MPLS traffic
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The switch only supports the service loopback group types of Tunnel and Multicast tunnel.

Requirements on service loopback ports

Before assigning a port to a service loopback group, ensure the port meets the following requirements.
The port supports the services type or types of the service loopback group.
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The port is configured with only QoS and ACL settings, or physical settings such as rate and duplex
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mode.
The port is not configured with MSTP, NDP, LLDP, 802.1X, MAC address authentication, port security
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mode, or IP source guard, or as the member port of an isolation group.
The link type of the port is access.
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The port is not a member of any Ethernet link aggregation group or service loopback group.
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States of service loopback ports

States of service loopback ports
A member port in a service loopback group is a service loopback port, which can be in one of the
following states:
Selected: a selected port can loop back user traffic.
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Unselected: an unselected port cannot loop back user traffic.
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The number of selected ports is limited in a service loopback group.
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