Where are multicast addresses available?

The multicast addresses are in the range 224.0. 0.0 through 239.255. 255.255.

What is multicast IP source-specific multicast?

Source-specific multicast (SSM) is a method of delivering multicast packets in which the only packets that are delivered to a receiver are those originating from a specific source address requested by the receiver. By so limiting the source, SSM reduces demands on the network and improves security.

How do I create a multicast IP address?

Enabling multicast on an IP address

  1. To check if multicast is enabled already on an IP address use the “ifconfig” command. # ifconfig eth0 | grep -i multi UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1.
  2. To disable multicast on a spcific ip/interface:
  3. To enable multicast on a specific ip/interface :

How do I get multicast traffic?

To view only IPv4 multicast traffic, type ip. addr >= 224.0. 0.0 (lower case) in the Filter box and press Enter. The traffic you are most likely to see is Simple Service Discovery Protocol (SSDP) traffic.

Where is multicast address in Windows?


  1. Click the Windows Start button.
  2. In the search bar (or the run bar on older versions of Windows), type cmd and press Enter. This should bring up a command prompt.
  3. At the prompt, type netsh int ip show joins and press Enter.

Does IGMPv2 support SSM?

Background. IGMPv3 supports source-specific multicast (SSM) but IGMPv1 and IGMPv2 do not.

What is difference between ASM and SSM?

In ASM, receivers express interest only in a given multicast group address. In contrast, with Source-Specific Multicast (SSM) the specific source(s) that may send traffic to the group are known in advance. In SSM, receivers express interest both in a given multicast address and specific associated source address(es).

How do I create a multicast network?

Cisco Switch Setup

  1. Bind multicast groups to specific ports (recommended on smaller networks)
  2. Enable Internet Group Management Protocol (IGMP) snooping (recommended)
  3. Enable Cisco Group Multicast Protocol (CGMP)
  4. Enable Generic Attribute Registration Protocol (GARP) Multicast Registration Protocol (GMRP)

How do I create a multicast group?

To join a multicast group, a host sends a join message, using the Internet Group Management Protocol (IGMP), to its first-hop router. Groups are identified by a single class D IP address (in the range 224.0. 0.0 to 239.255. 255.255).

What are the four primary message types used with dhcpv6?

Four DUID types are identified in RFC 8415 section 11:

  • Link-layer address plus time (DUID-LLT)
  • Vendor-assigned unique ID based on enterprise number (DUID-EN)
  • Link-layer address (DUID-LL)

What is the range of the multicast source and group addresses?

The Multicast Source adresses uses normal addresses. For example for IPv4, Multicast Group Addresses and the Multicast Source 0.0.0 – Multicast Group Address Range 0.0.0 – Source Address Range

What is the range of SSM destination addresses for multicast traffic?

Interest in multicast traffic from a specific source is conveyed from hosts to routers using IGMPv3 as specified in RFC 4607. SSM destination addresses must be in the ranges for IPv4. For IPv6 current allowed SSM destination addresses are specified by ff3x::/96, where the hexadecimal digit x represents the scope.

What is source specific multicast (SSM)?

This chapter describes how to configure Source Specific Multicast (SSM). The Source Specific Multicast feature is an extension of IP multicast where datagram traffic is forwarded to receivers from only those multicast sources to which the receivers have explicitly joined.

What is a Class D multicast address range?

Note The Class D address range is used only for the group address or destination address of IP multicast traffic. The source address for multicast datagrams is always the unicast source address. Table 1 gives a summary of the multicast address ranges discussed in this document.