Quick Notes - Multicast Boundry

In order to ensure AutoRP and the administratively scoped multicast addresses do not leak outside or into your multicast domain you need to filter the following:

224.0.1.40 - The Cisco multicast router AUTO-RP-DISCOVERY address is the destination address for messages from the RP mapping agent to discover candidates
224.0.1.39 - The Cisco multicast router AUTO-RP-ANNOUNCE address is used by RP mapping agents to listen for candidate announcements
239.0.0.0/8 - Administratively Scoped

Quick Notes - Multicast IPv4 Addressing

Class D - 224.0.0.0 - 239.255.255.255

Special Purpose Ranges

224.0.0.0 - 224.0.0.255 (Reserved link-local)
224.0.2.0 - 238.255.255.255 (Globally Scoped Addresses)
232.0.0.0 - 232.255.255.255 (Source-specific Multicast Addresses)
233.0.0.0 - 233.255.255.255 (GLOP Addresses)
239.0.0.0 - 239.255.255.255 (Administratively Scoped Addresses)

Reserved Link Local
-OSPF 224.0.0.5 and 224.0.0.6
-RIPv2 224.0.0.9
-EIGRP 224.0.0.10
-All multicast hosts 224.0.0.1
-All multicast routers 224.0.0.2

Globally Scoped
-General purpose applications and extends beyond the local AS

Source-Specific Multicast (SSM)
-Used with IGMPv3, allows a host to specify the source of the multicast traffic

GLOP
-Globally unique multicast based on AS numbers

Limited Scope
-Like RFC 1918, this does not leave the AS and is considered a private address range

Question 185

What command would you have to use in order to see "debug ip mpacket"? Remember that multicast packets are fast switched and they will not be sent to the processor, the only exception is when using the "ip igmp join-group" command.

Question 174

What PIM mode is required for BSR?

Question 173

What PIM mode is required for AutoRP?

Question 172

What PIM mode leverages shared trees and what PIM mode leverage source trees?

Question 170

What technology uses IP address 224.0.1.39 and 224.0.1.40?

Question 165

What command can be used to validate multicast reverse path forwarding for 10.0.0.1?

Image courtesy of Dongle

This is to further support the comments below

Question 163

How do you ensure that MSDP peers use the same IP address as there respective RPs (rendezvous point)?

Question 153

Why would you use "ip msdp msdp-group [name] [MSDP-PeerIP]"?

I have added an image to go with my comment.

Question 118

What does "ip multicast-routing distributed" provide?

Question 117

What does "ip pim rp-candidate" do?

Question 83

What is used to bypass an RPF check in multicast?

Question 16

What protocol can you use instead of using IGMP Snooping?

Question 15

What is SSM?

Question 12

What is RPF?

Question 11

What is IGMP?

Provide an example of its use.

Question 10

What is MRM and how do you use it?

Question 9

When to use MSDP?

Question 5

What are the different methods when creating Rendezvous Points?