5

Junos Space Connectivity Services Director

OAM and SLA Monitoring

After a service has been provisioned, the service provider must

be able to monitor the service in order to guarantee SLAs.

Monitoring involves checking end-to-end path connectivity

of the control plane and data plane. Control plane validation

involves verifying that the MPLS edge routers have indeed

established logical connections. Data plane validation involves

MPLS ping/trace route to ensure that the data plane is indeed

working. Connectivity Services Director provides the following

Operation, Administration, and Maintenance (OAM) and SLA

monitoring capabilities:

• Connectivity fault management (CFM) at the interface level

• Service-level CFM for E-Line and E-LAN services

• Link fault management (LFM)

• MPLS ping for LSP and VPN services

• MPLS traceroute for LSP services

• Support for Y.1731-based one-way and two-way

measurements for frame delay, frame delay variation, frame

loss, and service availability

Connectivity Services Director enables users to set up CFM

flows between service endpoints in order to monitor the end-

to-end service using Y.1731 frames. Users can choose to gather

performance data on demand, or create SLA iterators and assign

them to a service in order to periodically measure the data. In

addition to these iterators, users can also associate an action

profile with a service to describe actions that must be performed

when connectivity problems are detected with the service.

Figure 6: Performance data collected through OAM flows

Service Fault

Faults are very important events, immediately notifying the

service provider of an impending problem in the network.

Devices send alarms on events impacting them, and these

alarms, in turn, might be impacting the customer service. The

device may not be aware of direct impact of an alarm on the

network or the service, but Connectivity Services Director

correlates the two. As soon as Junos Space receives a device

alarm, the Correlation Service checks if any service(s) are

impacted because of this device alarm. Based on impacted

service(s), a service alarm is raised on each service, alerting the

operator about any potential impacts. As soon as a device alarm

is cleared, service alarms are cleared for affected services.

Service Recovery

Consider a scenario where a service provider has installed

Connectivity Services Director as a brown field installation. The

service provider might have hundreds of services deployed in

the network and no longer wants to manually manage them. For

service providers who would like to bring all of these services

into Connectivity Services Director, Connectivity Services

Director has a Service Recovery feature to upload these services

and manage them.

Topology

Viewing a network topology is an important aspect of any

management solution. Connectivity Services Director has a

BGP-LS based topology view that can be grouped based on:

• IS-IS area

• Autonomous number

• Custom group view

The topology view also shows optical links in the network.

Figure 7: Network topology—custom group view

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