No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

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.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Adjusting Control Parameters for DF Election in IPv6 Bidir-PIM

Adjusting Control Parameters for DF Election in IPv6 Bidir-PIM

Context

After devices on a shared network segment obtain rendezvous point (RP) information, they start a designated router (DR) election.

Configuration Procedure

You can configure the interval between Offer messages, interval between Backoff messages, and DF election robustness variable in any sequence.

NOTE:

Each DF election control parameter must be set to the same value on a shared network segment. Otherwise, the DF election may fail.

Configuring the Interval Between Offer Messages

Context

Devices on an IPv6 Bidir-PIM shared network segment exchange Offer messages for designated forwarder (DF) election. When a device obtains RP information, it sends an Offer message to the shared network segment and starts a timer, with the value set to the configured interval between Offer messages. Before the timer expires:

  • If the device receives an Offer message carrying a better routing information to the RP, the device stops sending Offer messages.
  • If the device receives no Offer message or receives Offer messages carrying inferior routing information to the RP, the device continues sending Offer messages when the timer expires and resets the timer.
NOTE:

The interval between Offer messages can be configured in the PIM-IPv6 view or interface view. If you configure this parameter in both the PIM-IPv6 view and interface view, the configuration in the interface view takes effect.

Default Settings

The default interval between Offer messages is 100 ms.

Procedure

  • Global configuration
    1. Run system-view

      The system view is displayed.

    2. Run pim ipv6

      The PIM-IPv6 view is displayed.

    3. Run offer-interval interval

      The interval between Offer messages is set.

    4. Run commit

      The configuration is committed.

  • Interface configuration
    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 offer-interval interval

      The interval between Offer messages is set.

    5. Run commit

      The configuration is committed.

Configuring the Interval Between Backoff Messages

Context

On a Bidir IPv6 PIM network, the elected designated forwarder (DF) sends a Backoff message when it receives a superior Offer message. If the DF does not receive any Offer within the interval for sending the next Backoff message, it sends a Pass message to notify all the multicast devices that a new DF appears. You can use this command to change the interval at which the DF sends Backoff messages.

NOTE:

The interval between Backoff messages can be configured in the PIM-IPv6 view or interface view. If you configure this parameter in both the PIM-IPv6 view and interface view, the configuration in the interface view takes effect.

Default Settings

The default interval between Backoff messages is 1s.

Procedure

  • Global configuration
    1. Run system-view

      The system view is displayed.

    2. Run pim ipv6

      The PIM-IPv6 view is displayed.

    3. Run backoff-interval interval

      The interval between Backoff messages is configured.

    4. Run commit

      The configuration is committed.

  • Interface configuration
    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 backoff-interval interval

      The interval between Backoff messages is configured.

    5. Run commit

      The configuration is committed.

Configuring the DF Election Robustness Variable

Context

Devices on an IPv6 Bidir-PIM shared network segment exchange Offer messages for designated forwarder (DF) election. The DF election robustness variable is used in a DF election in the following way:

  • If a device does not receive any Offer message from other devices after sending Offer messages robustness variable times, it considers itself as the DF.
  • If the device receives an Offer message from a neighbor with a smaller route metric to the RP, it stops participating in the DF election for a period (Time period = Robustness variable x Interval between Offer messages). This suppression period gives the neighbor a chance to be elected as the DF.
  • If the DF's route metric to the RP address increases, the DF sends Win messages at variable intervals to announce the new metric, for robustness variable times. If a device has a better route metric than the DF's, the device responds with an Offer message to trigger a new DF election.
NOTE:

The DF election robustness variable can be configured in the PIM-IPv6 view or interface view. If you configure this parameter in both the PIM-IPv6 view and interface view, the configuration in the interface view takes effect.

Default Settings

The default DF election robustness variable is 3.

Procedure

  • Global configuration
    1. Run system-view

      The system view is displayed.

    2. Run pim ipv6

      The PIM-IPv6 view is displayed.

    3. Run election-robust-count robust-value

      The DF election robustness variable is configured.

    4. Run commit

      The configuration is committed.

  • Interface configuration
    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 election-robust-count robust-value

      The DF election robustness variable is configured.

    5. Run commit

      The configuration is committed.

Verifying the Configuration of Control Parameters for DF Election in IPv6 Bidir-PIM

Prerequisites

After configuring control parameters for DF election, you can run the following commands to check information about IPv6 PIM interfaces, IPv6 PIM neighbors, and DFs.

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.
  • Run the display pim ipv6 df-info [ rp rp-address | interface interface-type interface-number | verbose ] * command to check information about DFs on the device.
Translation
Download
Updated: 2019-04-20

Document ID: EDOC1100039595

Views: 47513

Downloads: 85

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next