ISA_Video overview

Overview

The NFM-P supports, on a 7450 ESS or 7750 SR, the equipment and service configuration of the following enhancements to multicast video services based on the ISA-Video MDA:

• Reliable Delivery/Retransmission (RT) Proxy

• Fast Channel Change (FCC)

You can use the NFM-P to configure the required ISA-Video groups and members, as well as the associated multicast info policies. VPRN and IES services can then be configured for the customer video delivery.

These enhancements are provisioned in NFM-P in the following three areas:

• a video group configuration to manage the ISA resources and service grouping.

• multicast information policy configuration parameters and objects to handle the RT and FCC capabilities.

  These include the following:

  • a video policy configuration under the multicast information policy

  • video parameters added to multicast bundles, channels and channel override configurations

• video interface configurations added under VPRN/IES services sites.

The following figure shows the relationship of these elements and how they are associated through configuration.

Figure 35-1: ISA-Video configuration elements

A video interface within a service site can have up to eight IP addresses. The IP addresses assigned to a video interface determine which multicast info policy is applied. The video group you assign to the video interface determines which bundle/channel configuration inside the multicast info policy is applied to the interface. You also configure the ingress and egress QOS policies for the video interface using the video group.

If a request is received on a video interface for a channel not serviced by the video group associated with that specific video interface, then the request is considered invalid and is dropped. For example, in Figure 35-1, ISA-Video configuration elements , a request for mc-range2 received on IP1, IP2, or IP3 is invalid. A request for mc-range2 is only valid on IP4.

A video group manages the ISA-Video MDA resource and the configurations of the enhanced video functionality. You can assign a video group (for example, VG1 in Figure 35-1, ISA-Video configuration elements ) for each bundle, and this is the default video group for all of the channels in that bundle. You can then apply specific configuration overrides for each channel within a video group assignment.

Up to four video groups (ID 1-4) can be configured on a single NE. Each video group in turn, can have multiple primary video ISAs assigned to provide load balancing and redundancy protection. However, any specific video ISA can only be bound to one video group. The binding of a video ISA to the video group is referred as a video group member.

Additional considerations for the Ad Insertion functionality:

• Ingress Ad Insertion channels are configured on the video interface configuration form.

• If Ad Insertion functionality is enabled on a video group, then the group can only have one video group member.

• You can configure zone channels for egress Ad Insertion on each Ad Insertion channel configuration.