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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Adjusting Control Parameters for Establishing Neighbor Relationships in IPv6 Bidir-PIM

Adjusting Control Parameters for Establishing Neighbor Relationships in IPv6 Bidir-PIM

Configuration Procedure

You can configure the Hello message control parameters and neighbor filtering function in either sequence.

Adjusting Control Parameters for Hello Messages

Context

IPv6 PIM devices send Hello messages periodically to maintain IPv6 PIM neighbor relationships. When an IPv6 PIM device receives a Hello message from a neighbor, the IPv6 PIM device starts the timer and sets the timer to the holdtime of Hello messages. If the IPv6 PIM device does not receive a new Hello message from the neighbor within the holdtime, it considers the neighbor invalid or unreachable. Therefore, the interval for an IPv6 PIM device to send Hello messages must be smaller than the holdtime of Hello messages, so that IPv6 PIM devices can set up neighbor relationships successfully.

NOTE:

The interval for sending Hello messages and the holdtime of Hello messages can be set either globally or on an interface. If you configure the two parameters in the global PIM-IPv6 view and in the interface view simultaneously, the configuration in the interface view takes effect.

Default Settings

Table 5-19 lists default settings of control parameters for Hello messages.

Table 5-19 Default settings of control parameters for Hello messages
Parameter Default Setting

Interval for sending Hello messages

30s

Holdtime of Hello messages

105s

Procedure

  • Global configuration
    1. Run system-view

      The system view is displayed.

    2. Run pim ipv6

      The PIM-IPv6 view is displayed.

    3. Run timer hello interval

      The interval for sending Hello messages is configured.

    4. Run hello-option holdtime interval

      The holdtime of Hello messages is configured.

    5. Run commit

      The configuration is committed.

  • Configuration on an interface
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. On an Ethernet interface, run undo portswitch

      The interface is switched to Layer 3 mode.

      By default, an Ethernet interface works in Layer 2 mode.

      The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

      NOTE:

      If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

    4. Run pim ipv6 timer hello interval

      The interval for sending Hello messages is configured.

    5. Run pim ipv6 hello-option holdtime interval

      The holdtime of Hello messages is configured.

    6. Run commit

      The configuration is committed.

Configuring IPv6 PIM Neighbor Filtering

Context

The switch supports neighbor filtering policies to ensure secure and effective multicast transmission in an IPv6 PIM domain. You can perform the following operations to filter neighbors:
  • Configure a valid neighbor address range to prevent unauthorized neighbors from connecting to the network.
  • Configure the switch to reject Hello messages without Generation IDs so that switch connects to normally working IPv6 PIM neighbors.

Procedure

  • Configuring the range of valid neighbor addresses
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. On an Ethernet interface, run undo portswitch

      The interface is switched to Layer 3 mode.

      By default, an Ethernet interface works in Layer 2 mode.

      The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

      NOTE:

      If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

    4. Run pim ipv6 neighbor-policy { basic-acl6-number | acl6-name acl6-name }

      The range of valid neighbor addresses is configured.

      If the IP address of an IPv6 PIM neighbor that has established a neighbor relationship with the switch is not in the configured range of valid neighbor addresses, the switch will no longer receive Hello messages from this IPv6 PIM neighbor. When the holdtime of Hello messages expires, the neighbor relationship between the IPv6 PIM device and the switch is terminated.

    5. Run commit

      The configuration is committed.

  • Configuring the device to receive only Hello messages that contain Generation IDs
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. On an Ethernet interface, run undo portswitch

      The interface is switched to Layer 3 mode.

      By default, an Ethernet interface works in Layer 2 mode.

      The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

      NOTE:

      If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

    4. Run pim ipv6 require-genid

      The device is configured to receive only Hello messages that contain Generation IDs.

    5. Run commit

      The configuration is committed.

Verifying the Configuration of Control Parameters for Establishing Neighbor Relationships in IPv6 Bidir-PIM

Prerequisites

After the neighbor control parameters are adjusted, you can check information about IPv6 PIM interfaces and IPv6 PIM neighbors.

Procedure

  • Run the display pim ipv6 interface [ interface-type interface-number | up | down ] [ verbose ] command to check IPv6 PIM information on interfaces.
  • Run the display pim ipv6 neighbor [ ipv6-link-local-address | interface interface-type interface-number | verbose ] * command to check IPv6 PIM neighbor information.
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Updated: 2019-04-20

Document ID: EDOC1100039595

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