1 / 12

Multicast Listener Discovery (MLD) Snooping

Multicast Listener Discovery (MLD) Snooping. Ryan Chung. Multicast Listener Discovery (MLD). An IPv6 protocol used on a local link for multicast group management . Similar to IPv4 Internet Group Management Protocol (IGMP) Two versions: MLDv1(RFC 2710) and MLDv2(RFC 3810)

atara
Download Presentation

Multicast Listener Discovery (MLD) Snooping

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multicast Listener Discovery (MLD) Snooping Ryan Chung

  2. Multicast Listener Discovery (MLD) • An IPv6 protocol used on a local link for multicast group management. • Similar to IPv4 Internet Group Management Protocol (IGMP) • Two versions: MLDv1(RFC 2710) and MLDv2(RFC 3810) • MLDv1 substitutes IGMPv2 ; MLDv2 substitutes IGMPv3

  3. IGMP vs MLD

  4. MLD Snooping • Subset of the MLD protocol that operates at the MAC level and conserves network bandwidth by reducing the flooding of IPv6 multicast packets. • When receiving MLD messages, a Layer 2 device running MLD Snooping establishes mappings between ports and multicast MAC addresses and forwards IPv6 multicast data based on these mappings.

  5. MLD Snooping

  6. MLD Snooping – Three Roles • MLD host—A network node that uses MLD to “join” one or more multicast groups • Multicast router—A router that routes multicast traffic between subnets • Querier—A switch or multicast router that identifies MLD hosts by sending out MLD queries, to which the MLD hosts respond

  7. How MLD Snooping Works Join a Group Leave a Group MLD Router/Querier MLD Router/Querier Specific Query Query Report Done MLD Snooping EnabledL2 Switch MLD Snooping Enabled L2 Switch Report Report Done PC PC PC PC PC

  8. Multicast Addressing - IP • IPv4 Multicast Addressing (Class D address) • IPv6 Multicast Addressing

  9. Well-Known Multicast Address

  10. Multicast Addressing - MAC • IPv4 Ethernet Multicast address mapping • IPv6 Ethernet Multicast address mapping

  11. Test Scenario • Configureation: enable mld_snooping config mld_snooping all state enable config mld_snooping querier all state enable show mld_snooping show mld_snooping group show mld_snooping forwarding show mld_snooping vlan show fdb Group (FFEE::1) Multicast Stream Multicast Stream X X Multicast Stream Group (FFEE::1) Group (FFEE::1) PC Multicast Member V V X X

  12. Thank you !

More Related