HP 5900 series Command Reference Manual page 204

multicast-tunnel: Specifies the service type of a service loopback group as Multicast tunnel (multicast
tunnel service).
tunnel: Specifies the service type of a service loopback group as Tunnel (unicast tunnel service).
Usage guidelines
A service loopback group can be referenced by other features once it is created, and can process service
traffic only after it is referenced. A service loopback group may be referenced by multiple features at the
same time.
Only one service loopback group is allowed for a service type.
You cannot change the service type of a referenced service loopback group.
HP recommends that you not delete a referenced service loopback group.
Examples
# Create service loopback group 5 and specify its service type as Tunnel.
<Sysname> system-view
[Sysname] service-loopback group 5 type tunnel
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