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    Configuring MSDP Protocol (NSM Procedure)

    The Multicast Source Discovery Protocol (MSDP) is used to connect multicast routing domains. It typically runs on the same router as the Protocol Independent Multicast (PIM) sparse-mode rendezvous point (RP). Each MSDP router establishes adjacencies with internal and external MSDP peers similar to the Border Gateway Protocol (BGP). These peer routers inform each other about active sources within the domain. When they detect active sources, the routers can send PIM sparse-mode explicit join messages to the active source. You can enable MSDP on the router using the MSDP option. See the following topics.

    Configuring MSDP on the Router (NSM Procedure)

    You can enable multicast source discovery protocol (MSDP) on the router using the MSDP option.

    To enable MSDP on the router in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select MSDP.
    5. Add or modify settings as specified in Table 1.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 1: MSDP Configuration Details

    TaskYour Action

    Enable MSDP on the router.

    1. In the Comment box, enter the comment.
    2. From the Data Encapsulation list, select one of the following:
      • disable—Do not use MSDP data encapsulation.
      • enable—Use MSDP data encapsulation.
    3. Select the Disable check box to disable MSDP.
    4. In the Local Address box, enter the IP address of the local end of the connection.

    Configuring the MSDP Active Source Limit (NSM Procedure)

    A router interested in MSDP messages, such as a rendezvous point (RP), might have to process a large number of MSDP messages, especially source-active messages, arriving from other routers. Because of the potential need for a router to examine, process, and create state tables for many MSDP packets, there is a possibility of an MSDP-based DoS attack on a router running MSDP. To minimize this possibility, you can configure the router to limit the number of source active messages the router accepts. Also, you can configure a threshold for applying random early discard (RED) to drop some but not all MSDP active source messages.

    To configure the MSDP active source limit on the router in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 2.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 2: Active Source Limit Configuration Details

    TaskYour Action

    Configure active source limit.

    1. Click Active Source Limit next to Msdp.
    2. In the Comment box, enter the comment.
    3. From the Maximum list, select the maximum number of active source messages.

      Range: 1 through 1,000,000

      Default: 25,000

    4. From the Threshold list, select the RED threshold for active source messages.

      Range: 1 through 1,000,000

      Default: 24,000

    Configuring Export Policy (NSM Procedure)

    To apply policies to source-active messages being exported from the source-active cache into MSDP, use the Export option.

    To configure export policy in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 3.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 3: Export Policy Configuration Details

    TaskYour Action

    Apply one or more policies to routes being exported from the routing table into MSDP.

    1. Click Export Policy next to Msdp.
    2. Use the following options to select the policies to export.
      • Click Add after selecting a policy member from the Non member list to add it to the Members list.
      • Click Remove after selecting a policy from the Members list to remove it from the Members list.
      • Click Add All to add all the Non members to the Members list.
      • Click Remove All to remove all the members from the Members list.

    Configuring MSDP Peer Group

    Configuring MSDP Peer Group (NSM Procedure)

    You can define an MSDP peer group using the Group option.

    To configure an MSDP peer group in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 4.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 4: Peer Group Configuration Details

    TaskYour Action

    Define an MSDP peer group.

    1. Click Group next to Msdp.
    2. Click Add new entry next to Group.
    3. In the Name box, enter the name of the MSDP group.
    4. In the Comment box, enter the comment.
    5. From the Mode list, select the mesh groups.
    6. Select the Disable check box to disable MSDP.
    7. In the Local Address box, enter the IP address of the local end of the connection.

    Apply one or more policies to routes being exported from the routing table into MSDP.

    1. Click Export next to Group.
    2. Use the following options to select the policies to export:
      • Click Add after selecting a policy member from the Non member list to add it to the Members list.
      • Click Remove after selecting a policy from the Members list to remove it from the Members list.
      • Click Add All to add all the Non members to the Members list.
      • Click Remove All to remove all the members from the Members list.

    Apply one or more policies to routes being imported into the routing table from MSDP.

    1. Click Import next to Group.
    2. Use the following options to select the policies to import:
      • Click Add after selecting a policy member from the Non member list to add it to the Members list.
      • Click Remove after selecting a policy from the Members list to remove it from the Members list.
      • Click Add All to add all the Non members to the Members list.
      • Click Remove All to remove all the members from the Members list.

    Configuring MSDP Peers (NSM Procedure)

    An MSDP router must know which routers are its peers. You define the peer relationships explicitly by configuring the neighboring routers that are the MSDP peers of the local router. After peer relationships are established, the MSDP peers exchange messages to advertise active multicast sources. You must configure at least one peer for MSDP to function.

    To configure MSDP peers in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 5.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 5: MSDP Peer Configuration Details

    TaskYour Action

    Configure MSDP peers.

    1. Click Group next to Msdp.
    2. Click Add new entry next to Group.
    3. Click Peer next to group.
    4. Click Add new entry next to Peer.
    5. In the Name box, enter the name of the MSDP group.
    6. In the Comment box, enter the comment.
    7. From the Mode list, select the mesh groups.
    8. Select the Disable check box to disable MSDP.
    9. In the Local Address box, enter the IP address of the local end of the connection.
    10. Select the Default Peer check box to establish this peer as the default MSDP peer and accept source-active messages from the peer without the usual peer-reverse-path-forwarding (peer-RPF) check.
    11. In the Authentication Key box, enter the MD5 authentication key.

    Configure active source limit.

    1. Click Active Source Limit next to Peer.
    2. In the Comment box, enter the comment.
    3. From the Maximum list, select the maximum number of active source messages.

      Range: 1 through 1,000,000

      Default: 25,000

    4. From the Threshold list, select the RED threshold for active source messages.

      Range: 1 through 1,000,000

      Default: 24,000

    Apply one or more policies to routes being exported from the routing table into MSDP.

    1. Click Export next to Peer.
    2. Use the following options to select the policies to export:
      • Click Add after selecting a policy member from the Non member list to add it to the Members list.
      • Click Remove after selecting a policy from the Members list to remove it from the Members list.
      • Click Add All to add all the Non members to the Members list.
      • Click Remove All to remove all the members from the Members list.

    Apply one or more policies to routes being imported into the routing table from MSDP.

    1. Click Import next to Peer.
    2. Use the following options to select the policies to import:
      • Click Add after selecting a policy member from the Non member list to add it to the Members list.
      • Click Remove after selecting a policy from the Members list to remove it from the Members list.
      • Click Add All to add all the Non members to the Members list.
      • Click Remove All to remove all the members from the Members list.

    Configure MSDP tracing options.

    1. Click Traceoptions next to Peer.
    2. In the Comment box, enter the comment for the traceoptions.
    3. Click File next to Traceoptions.
    4. In the Comment box, enter the comment for the filename.
    5. In the Filename box, enter the name of the file to receive the output of the tracing operation.
    6. In the Size box, enter the maximum trace file size.
    7. From the Files list, select the maximum number of trace files.
    8. Select one of the following:
      • no-world-readable—To restrict the file access to owner.
      • world-readable—To enable unrestricted access.
    9. Click Flag next to Traceoptions.
    10. Click Add new entry next to Flag.
    11. From the Name list, select the flag to perform the trace operation.
    12. In the Comment box, enter the comment for the flag.
    13. Select the corresponding modifier for the tracing flag.

    Configuring a Routing Table Group with MSDP (NSM Procedure)

    To associate with MSDP a routing table group that imports and exports routes into the specified routing table group, you can use the Rib Group option.

    To associate a routing table group with MSDP in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 6.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 6: Rib Group Configuration Details

    TaskYour Action

    Associate a routing table group with MSDP.

    1. Click Rib Group next to Msdp.
    2. In the Comment box, enter the comment.
    3. In the Ribgroup Name box, enter the name of the routing table group.

    Configuring Per-Source Active Source Limit (NSM Procedure)

    You can configure an active source limit for an address range as well as for a specific peer. A per-source active source limit uses an IP prefix and prefix length instead of a specific address. You can configure more than one per-source active source limit. The longest match determines the limit.

    To configure an active source limit for an address range as well as for a specific peer in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 7.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 7: Active Source Limit Configuration Details

    TaskYour Action

    Configure an active source limit for an address range as well as for a specific peer.

    1. Click Source next to Msdp.
    2. Click Add new entry next to Source.
    3. In the Name box, enter the IP address.
    4. In the Comment box, enter the comment.

    Configure active source limit.

    1. Click Active Source Limit next to source.
    2. In the Comment box, enter the comment.
    3. From the Maximum list, select the maximum number of active source messages.

      Range: 1 through 1,000,000

      Default: 25,000

    4. From the Threshold list, select the RED threshold for active source messages.

      Range: 1 through 1,000,000

      Default: 24,000

    Configuring MSDP Traceoptions (NSM Procedure)

    You can configure the MSDP traceoption using the Traceoption option.

    To configure traceoptions in NSM:

    1. In the NSM navigation tree, select Device Manager > Devices.
    2. Click the Device Tree tab, and then double-click the device to select it.
    3. Click the Configuration tab. In the configuration tree, expand Protocols.
    4. Select Msdp.
    5. Add or modify settings as specified in Table 8.
    6. Click one:
      • OK—Saves the changes.
      • Cancel—Cancels the modifications.

    Table 8: MSDP Traceoption Configuration Details

    TaskYour Action

    Configure traceoptions.

    1. Click Traceoptions next to Msdp.
    2. In the Comment box, enter the comment for the traceoptions.
    3. Click File next to Traceoptions.
    4. In the Comment box, enter the comment for the filename.
    5. In the Filename box, enter the name of the file to receive the output of the tracing operation.
    6. In the Size box, enter the maximum trace file size.
    7. From the Files list, select the maximum number of trace files.
    8. Select one of the following:
      • no-world-readable—To restrict the file access to owner.
      • world-readable—To enable unrestricted access.
    9. Click Flag next to Traceoptions.
    10. Click Add new entry next to Flag.
    11. From the Name list, select the flag to perform the trace operation.
    12. In the Comment box, enter the comment for the flag.
    13. Select the corresponding modifier for the tracing flag.

    Published: 2013-01-02