Configuring Multicast (NSM Procedure)

You can configure generic multicast properties for routing instances. A routing instance is a collection of routing tables, interfaces, and routing protocol parameters. The routing protocol parameters control the information in the routing tables.

To configure generic multicast properties for routing instance in NSM:

  1. In the navigation tree, select Device Manager > Devices.
  2. In the Devices list, double-click the device to select it.
  3. Click the Configuration tab.
  4. In the configuration tree, expand Routing Options.
  5. Select Multicast.
  6. Add or modify the parameters as specified in Table 49.
  7. Click one:
    • OK—To save the changes.
    • Cancel—To cancel the modifications.
    • Apply—To apply the routing option settings.

Note: After you make changes to a device configuration, you must push that updated device configuration to the physical security device for those changes to take effect. You can update multiple devices at one time. See the Updating Devices section in the Network and Security Manager Administration Guide for more information.

Table 49: Configuring Multicast Fields

Option

Function

Your Action

Comment

Specifies the comment for the multicast configuration.

Enter the comment.

Backup Pe Group

Enables you to configure a backup provider edge (PE) group for ingress PE device redundancy when point-to-multipoint label-switched paths (LSPs) are used for multicast distribution.

  1. Expand the Multicast tree and select Backup Pe Group.
  2. Click the New button or select a group and click the Edit button.
  3. Configure the PE group name, local address, and backup address.

Flow Map

Enables you to set up multicast flow maps to manage a subset of multicast forwarding table entries. For example, you can specify that certain forwarding cache entries be permanent or have a different timeout value than those of other multicast flows that are not associated with this flow map .

  1. Expand the Multicast tree and select Flow Map.
  2. Click the New button or select a flow map and click the Edit button.
  3. Configure the following to create and define a flow map:
    • Enter the flow map name and comment.
    • Bandwidth—Specify the bandwidth property of the multicast flow map.
    • Forwarding Cache—Specify the forwarding cache properties of entries defined by a flow map. You can specify a timeout of never to make the forwarding entries permanent, or you can specify a timeout from 1 through 720 minutes.
    • Policy—Specify the flow map policies.
    • Redundant Sources—Specify the addresses for use as backup sources for multicast flows defined by a flow map.

Forwarding Cache

Enables you to configure multicast forwarding cache properties. These properties include threshold suppression and reuse limits, and timeout values.

You can specify a value for the threshold to suppress new multicast forwarding cache entries and an optional reuse value for the threshold at which the device begins to create new multicast forwarding cache entries. If you configure both reuse and suppression values, configure a reuse value that is less than the suppression value. The suppression value is mandatory. If you do not specify the optional reuse value, then the number of multicast forwarding cache entries is limited to the suppression value. A new entry is created as soon as the number of multicast forwarding cache entries falls below the suppression value. You can also specify a timeout value for all multicast forwarding cache entries.

  1. Expand the Multicast tree and select Forwarding Cache.
  2. Configure the timeout and threshold values.

Interface

Enables you to configure the interfaces for multicast properties on which you plan to manage the maximum bandwidth.

  1. Expand the Multicast tree and select Interface.
  2. Configure the interface and the bandwidth.

Rpf Check Policy

Multicast reverse path forwarding (RPF) checks are used to prevent multicast routing loops. Routing loops are particularly debilitating in multicast applications because packets are replicated with each pass around the routing loop.

You can apply policies for disabling reverse-path forwarding (RPF) checks on arriving multicast packets.

  1. Expand the Multicast tree and select Rpf Check Policy.
  2. Click the New button or select a policy and click the Edit button.
  3. Enter the RPF check policy name.

Scope

Enables you to configure multicast scoping to limit multicast traffic by configuring it to an administratively defined topological region. Multicast scoping controls the propagation of multicast messages—both multicast group joins upstream toward a source and data forwarding downstream. Scoping can relieve stress on scarce resources, such as bandwidth, and improve privacy or scaling properties.

  1. Expand the Multicast tree and select Scope.
  2. Configure the scope and the interface for the multicast.

Scope Policy

Enables you to configure multicast scoping policy. A multicast scope policy contains a set of device interfaces on which you are configuring scoping and the scope's address range configured as a series of device filters.

  1. Expand the Multicast tree and select Scope Policy.
  2. Specify the scope policy for the multicast group.

Ssm Groups

Enables you to configure source- specific multicast (SSM) groups. SSM is a service model that identifies session traffic by both source and group address. Using SSM, a client can receive multicast traffic directly from the source. To deploy SSM successfully, you need an end-to-end multicast-enabled network and applications that use an Internet Group Management Protocol version 3 (IGMPv3).

  1. Expand the Multicast tree and select Ssm Groups.
  2. Click the New button or select a group and click the Edit button.
  3. Specify the address range of the SSM group.

Ssm Map

SSM mapping translate IGMPv1 or IGMPv2 membership reports to an IGMPv3 report allowing you to support an SSM network without requiring all hosts to support IGMPv3.

  1. Expand the Multicast tree and select Ssm Map.
  2. Click the New button or select an SSM map and click the Edit button.
  3. Specify the SSM policy for the SSM map and the source address.

Traceoptions

Defines tracing options for the multicast group. You can also set up the file management and access control parameters .

  1. Expand the Multicast tree and select the Traceoptions tab.
  2. Set up the file and flag parameters.