Package svt
The XML API OSS interface uses the svt package to configure service tunnels.
Distributed VLL service and VPLS (M-VPLS) traffic is transported from one edge router to
another edge router by circuits aggregated in unidirectional service tunnels. Service
tunnels terminate at a destination router, which directs packets to the correct service
egress access interfaces on that device. Service tunnels can be configured to use
Generic Router Encapsulation (GRE) or MPLS Label Switched Paths (LSPs).
Service tunnels encapsulate the data between the two edge routers appears as a Layer
2 path to the service data although it is really traversing an IP or IP/MPLS core.
When you configure a service tunnel, consider the following:
- Service tunnels must be created in both directions: from the source router to a
destination router, and from the destination router back to the source router.
- The tunnel is locally unique to a participating router. The same tunnel ID can
appear on other routers.
- The tunnel is not specific to any one service or any type of service. Once a tunnel
is created, multiple service circuits are aggregated over the tunnel.
- All services that are mapped to a tunnel use the same transport encapsulation type
defined for the tunnel (GRE or MPLS).
- Operations on the tunnel affect all the services that are associated with the tunnel.
For example, the operational and administrative state of a tunnel controls the state
of service circuits that are carried on the tunnel.
- A tunnel uses the system IP address to identify the far-end edge router.