H3C S9500 Series Operation Manual
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H3C S9500 Series Operation Manual

H3C S9500 Series Operation Manual

Igmp snooping, routing switches
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Operation Manual - IGMP Snooping
H3C S9500 Series Routing Switches
Chapter 1 IGMP Snooping Configuration ................................................................................... 1-1
1.1 IGMP Snooping Overview ................................................................................................. 1-1
1.1.1 Principle of IGMP Snooping .................................................................................... 1-1
1.1.2 Basic Concepts in IGMP Snooping ......................................................................... 1-2
1.1.3 Work Mechanism of IGMP Snooping ...................................................................... 1-4
1.1.4 Processing of Multicast Protocol Messages ........................................................... 1-6
1.1.5 Protocols and Standards......................................................................................... 1-7
1.2 IGMP Snooping Configuration Task List ........................................................................... 1-7
1.3 Configuring Basic Functions of IGMP Snooping ............................................................... 1-8
1.3.1 Configuration Prerequisites..................................................................................... 1-8
1.3.2 Enabling IGMP Snooping........................................................................................ 1-8
1.3.3 Configuring the Version of IGMP Snooping ............................................................ 1-9
1.4 Configuring IGMP Snooping Port Functions.................................................................... 1-10
1.4.1 Configuration Prerequisites................................................................................... 1-10
1.4.2 Configuring Static Ports ........................................................................................ 1-10
1.4.3 Configuring Simulated Joining .............................................................................. 1-11
1.4.4 Configuring Fast Leave Processing ...................................................................... 1-12
1.4.5 Configuring Aging Timers for Dynamic Ports........................................................ 1-13
1.5 Configuring IGMP-Related Functions .............................................................................. 1-14
1.5.1 Configuration Prerequisites................................................................................... 1-14
1.5.2 Enabling IGMP Snooping Querier......................................................................... 1-15
1.5.3 Configuring IGMP Queries and Responses.......................................................... 1-15
1.5.4 Configuring Source IP Address of IGMP Queries................................................. 1-17
1.5.5 Configuring IGMP Report Suppression................................................................. 1-18
1.6 Configuring a Multicast Group Policy............................................................................... 1-18
1.6.1 Configuration Prerequisites................................................................................... 1-18
1.6.2 Configuring a Multicast Group Filter...................................................................... 1-18
1.6.4 Configuring Multicast Group Replacement ........................................................... 1-20
1.7 Displaying and Maintaining IGMP Snooping ................................................................... 1-21
1.8 IGMP Snooping Configuration Examples ........................................................................ 1-22
1.8.1 Configuring Simulated Joining .............................................................................. 1-22
1.8.2 IGMP Snooping Querier Configuration ................................................................. 1-24
1.8.3 Static Router Port Configuration ........................................................................... 1-26
1.9 Troubleshooting IGMP Snooping Configuration .............................................................. 1-28
1.9.1 Switch Fails in Layer 2 Multicast Forwarding........................................................ 1-28
1.9.2 Configured Multicast Group Policy Fails to Take Effect........................................ 1-29

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  • Page 1: Table Of Contents

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Table of Contents Table of Contents Chapter 1 IGMP Snooping Configuration ................... 1-1 1.1 IGMP Snooping Overview ....................1-1 1.1.1 Principle of IGMP Snooping ..................1-1 1.1.2 Basic Concepts in IGMP Snooping ................. 1-2 1.1.3 Work Mechanism of IGMP Snooping ..............
  • Page 2 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Table of Contents...

  • Page 3: Chapter 1 Igmp Snooping Configuration

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Chapter 1 IGMP Snooping Configuration When configuration IGMP Snooping, go to the following sections for information you are interested in: IGMP Snooping Overview Configuring Basic Functions of IGMP Snooping...

  • Page 4: Basic Concepts In Igmp Snooping

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Multicast packet transmission Multicast packet transmission without IGMP Snooping when IGMP Snooping runs Multicast router Multicast router Source Source Layer 2 switch Layer 2 switch...
  • Page 5 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Router port: A router port is a port on the Layer-3 multicast device or the IGMP querier side of the Ethernet switch. In the figure, Ethernet 1/1/10 of Switch A and Ethernet 1/0 of Switch B are router ports.

  • Page 6: Work Mechanism Of Igmp Snooping

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration 1.1.3 Work Mechanism of IGMP Snooping Caution: Only dynamic ports can be automatically added or deleted by the system. Static ports can be added or deleted only through the corresponding configurations.
  • Page 7 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration If a forwarding table entry exists for the reported group, but the port is not included in the outgoing port list for that group in the forwarding entry, the switch adds the port as a dynamic member port into the outgoing port list, and starts an aging timer for that port.

  • Page 8: Processing Of Multicast Protocol Messages

    1.1.4 Processing of Multicast Protocol Messages With Layer 3 multicast routing enabled, an IGMP Snooping–capable S9500 series Ethernet switch processes multicast protocol messages differently under different conditions, specifically as follows: If only IGMP is enabled, or both IGMP and PIM are enabled on the switch, the switch handles multicast protocol messages in the normal way.

  • Page 9: Protocols And Standards

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration 1.1.5 Protocols and Standards IGMP Snooping is documented in RFC 4541: Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Snooping Switches.

  • Page 10: Configuring Basic Functions Of Igmp Snooping

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Note: Configurations made in IGMP Snooping view are effective for all VLANs, while configurations made in VLAN view are effective only for ports belonging to the current VLAN.

  • Page 11: Configuring The Version Of Igmp Snooping

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Note: IGMP Snooping must be enabled globally before it can be enabled in a VLAN. When you enable IGMP Snooping in a specified VLAN, this function takes effect for Ethernet ports in this VLAN only.

  • Page 12: Configuring Igmp Snooping Port Functions

    Disabled by default Note: An S9500 series routing switch still forward unknown multicast data to other router ports in the VLAN even if enabled to drop unknown multicast data. 1.4 Configuring IGMP Snooping Port Functions 1.4.1 Configuration Prerequisites...

  • Page 13: Configuring Simulated Joining

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Follow these steps to configure static ports: To do... Use the command... Remarks Enter system view — system-view Enter Ethernet interface interface-type interface view interface-number...

  • Page 14: Configuring Fast Leave Processing

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration When a port is configured as a simulated member host, the switch sends an unsolicited IGMP report through that port. After a port is configured as a simulated member host, the switch responds to IGMP general queries by sending IGMP reports through that port.

  • Page 15: Configuring Aging Timers For Dynamic Ports

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration To do... Use the command... Remarks Enter system view system-view — Enter IGMP Snooping igmp-snooping — view Required Enable fast leave fast-leave [ vlan vlan-list ]...

  • Page 16: Configuring Igmp-Related Functions

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration If the switch receives no IGMP reports for a multicast group on a dynamic member port, the switch removes the port from the outgoing port list of the forwarding table entry for that multicast group when the aging timer of the port for that group expires.

  • Page 17: Enabling Igmp Snooping Querier

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Maximum response time to IGMP general queries Source address of IGMP general queries Source address of IGMP group-specific queries Whether to enable IGMP report suppression 1.5.2 Enabling IGMP Snooping Querier...
  • Page 18 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration the range of 0 to the maximum response time (the host obtains the value of the maximum response time from the Max Response Time field in the IGMP query it received).

  • Page 19: Configuring Source Ip Address Of Igmp Queries

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration To do... Use the command... Remarks Configure the IGMP igmp-snooping Optional last-member query last-member-query-inter 1 second by default interval val interval Caution: Make sure that the IGMP general query interval is larger than the maximum response time for IGMP general queries.

  • Page 20: Configuring Igmp Report Suppression

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration 1.5.5 Configuring IGMP Report Suppression When a Layer 2 device receives an IGMP report from a multicast group member, the device forwards the message to the Layer 3 device directly connected with it. Thus,...

  • Page 21: Configuring Maximum Multicast Groups That Can Be Joined On A Port

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration join this multicast group, the switch adds this port to the IGMP Snooping forwarding table; otherwise the switch drops this report message. Any multicast data that has failed the ACL check will not be sent to this port.

  • Page 22: Configuring Multicast Group Replacement

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Follow these steps to configure the maximum number of multicast groups that can be joined on a port or ports: To do... Use the command...

  • Page 23: Displaying And Maintaining Igmp Snooping

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration I. Configuring multicast group replacement globally Follow these steps to configure multicast group replacement globally: To do... Use the command... Remarks Enter system view system-view —...

  • Page 24: Igmp Snooping Configuration Examples

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration To do... Use the command... View IGMP Snooping multicast group display igmp-snooping group [ vlan information vlan-id ] [ slot slot-id ] [ verbose ]...
  • Page 25 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration II. Network diagram Receiver Host A Source Receiver Eth1/1/3 Eth1/1/2 Eth1/1/1 Eth1/1/4 Eth1/1/2 1.1.1.2/24 10.1.1.1/24 Router A Switch A Host B Eth1/1/1 1.1.1.1/24 IGMP querier...

  • Page 26: Igmp Snooping Querier Configuration

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Note: The configurations mentioned above are for reference only. Specific configurations are subject to the actual implementations of the devices. Configure Switch A # Create VLAN 100.
  • Page 27 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration II. Network diagram Figure 1-4 Network diagram for IGMP Snooping querier configuration III. Configuration procedure Configure switch A. # Enable IGMP Snooping globally. <SwitchA> system-view...

  • Page 28: Static Router Port Configuration

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration # Create VLAN 100, add Ethernet 1/1/1 through Ethernet 1/1/3 to VLAN 100, and enable IGMP Snooping in this VLAN. [SwitchB] vlan 100 [SwitchB-vlan100] port ethernet 1/1/1 to ethernet 1/1/3 [SwitchB-vlan100] igmp-snooping enable Configuration on Switch C.
  • Page 29 Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration II. Network diagram Figure 1-5 Network diagram for static router port configuration III. Configuration procedure Configure IP addresses Configure an IP address and subnet mask for each interface as per Figure 1-5.

  • Page 30: Troubleshooting Igmp Snooping Configuration

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration Configure Switch A # Create VLAN 100. <SwitchA> system-view [SwitchA] vlan 100 # Add Ethernet1/1/1 through Ethernet1/1/4 into VLAN 100. [SwitchA-vlan100] port ethernet 1/1/1 to ethernet 1/1/4 [SwitchA-vlan100] quit # Enable IGMP Snooping in VLAN 100 and configure the version as 2.

  • Page 31: Configured Multicast Group Policy Fails To Take Effect

    Operation Manual – IGMP Snooping H3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration 1.9.2 Configured Multicast Group Policy Fails to Take Effect I. Symptom Although a multicast group policy has been configured to allow hosts to join specific multicast groups, the hosts can still receive multicast data addressed to other multicast groups.

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