Brocade Communications Systems IPMC5000PEF Grafts to a multicast tree

Grafts to a multicast tree

A PIM device restores pruned branches to a multicast tree by sending graft messages towards the

upstream device. Graft messages start at the leaf node and travel up the tree, first sending the

message to its neighbor upstream device.

In the preceding example, if a new 229.255.0.1 group member joins on device R6, which was

previously pruned, a graft is sent upstream to R4. Since the forwarding state for this entry is in a prune

state, R4 sends a graft to R1. Once R4 has joined the tree, R4 along with R6 once again receive

multicast packets.

Prune and graft messages are continuously used to maintain the multicast delivery tree. You do not

need to configure anything.

Grafts to a multicast tree

84 FastIron Ethernet Switch IP Multicast Configuration Guide

53-1003085-02

Contents

Main Page Contents Page Page Page Page Page Preface Document conventions Text formatting conventions Command syntax conventions Notes, cautions, and warnings Notes, cautions, and warnings Brocade resources Getting technical help Brocade resources Document feedback Document feedback About This Guide Introduction Supported hardware Whats new in this document How command information is presented in this guide How command information is presented in this guide IPv4 Multicast Traffic Reduction Supported IPv4 Multicast Traffic Reduction IGMP snooping overview Queriers and non-queriers Queriers and non-queriers VLAN-specific configuration Tracking and fast leave Support for IGMP snooping and Layer 3 multicast routing together on the same device Forwarding mechanism in hardware IP-based forwarding implementation on FCX and ICX devices Hardware resources for IGMP and PIM-SM snooping Configuration notes and feature limitations for IGMP snooping and Layer 3 multicast routing MAC-based forwarding implementation on FastIron X Series devices IGMP snooping configuration IGMP snooping configuration IGMP snooping mcache entries and group addresses Changing the maximum number of supported IGMP snooping mcache entries IGMP snooping mcache entries and group addresses Setting the maximum number of IGMP group addresses Enabling IGMP snooping globally on the device Configuration notes for Layer 3 devices Configuring the IGMP mode Setting the maximum number of IGMP group addresses Configuring the IGMP version Configuring the global IGMP version Configuring the IGMP version for a VLAN Configuring the global IGMP mode Configuring the IGMP version for individual ports in a VLAN Configuring static groups to specific ports Information specific to FCX and ICX devices Configuring the IGMP version for individual ports in a VLAN Disabling IGMP snooping on a VLAN Modifying the age interval for group membership entries Modifying the query interval (active IGMP snooping mode only) Modifying the maximum response time Disabling IGMP snooping on a VLAN Configuring report control Modifying the wait time before stopping traffic when receiving a leave message Modifying the multicast cache age time Configuring report control Enabling or disabling error and warning messages Configuring static router ports Turning off static group proxy Enabling IGMP V3 membership tracking and fast leave for the VLAN Enabling or disabling error and warning messages Enabling fast leave for IGMP V2 Enabling fast convergence Enabling fast leave for IGMP V2 IGMP snooping show commands Displaying the IGMP snooping configuration IGMP snooping show commands Displaying IGMP snooping errors Displaying IGMP group information Displaying IGMP snooping errors Displaying IGMP snooping mcache information Displaying IGMP snooping mcache information Displaying software resource usage for VLANs Displaying software resource usage for VLANs Displaying the status of IGMP snooping traffic Displaying the status of IGMP snooping traffic Displaying querier information Displaying querier information Displaying the active interface with no other querier present The following example shows the output in which the VLAN interface is active and no other querier is Displaying the passive interface with no other querier present Displaying the active Interface with other querier present The following example shows the output in which the VLAN interface is active and another querier is Displaying the passive interface with other querier present The following example shows the output in which the VLAN interface is passive and another querier is Displaying the passive interface with other querier present Clear commands for IGMP snooping Clearing the IGMP mcache Clearing the mcache on a specific VLAN Clearing traffic on a specific VLAN Clear commands for IGMP snooping Disabling the flooding of unregistered IPv4 multicast frames in an IGMP-snooping-enabled VLAN PIM SM traffic snooping overview Application examples of PIM SM traffic snooping Clearing IGMP counters on VLANs IPv4 Multicast Traffic Reduction Configuration notes and limitations for PIM SM snooping Configuration notes and limitations for PIM SM snooping PIM SM snooping configuration Enabling or disabling PIM SM snooping PIM SM snooping configuration Enabling PIM SM snooping on a VLAN Disabling PIM SM snooping on a VLAN PIM SM snooping show commands Displaying PIM SM snooping information Enabling PIM SM snooping on a VLAN Displaying PIM SM snooping information on a Layer 2 switch Displaying PIM SM snooping information on a Layer 2 switch Displaying PIM SM snooping information for a specific group or source group pair Displaying PIM SM snooping information for a specific group or source group pair Page IPv6 Multicast Traffic Reduction IPv6 Multicast Traffic Reduction MLD snooping overview Support for MLD snooping and Layer 3 IPv6 multicast routing together on the same device Support for MLD snooping and Layer 3 IPv6 multicast routing together on the same device Forwarding mechanism in hardware IP-based forwarding implementation on FCX and ICX devices MAC-based forwarding implementation on FastIron X Series and ICX 7750 devices Hardware resources for MLD and PIMv6 SM snooping Forwarding mechanism in hardware MLD snooping configuration notes and feature limitations MLD snooping configuration notes and feature limitations MLD snooping-enabled queriers and non-queriers MLD snooping-enabled queriers and non-queriers MLD and VLAN configuration MLDv1 with MLDv2 MLD snooping configuration MLD and VLAN configuration Configuring the hardware and software resource limits Configuring the global MLD mode Configuring the hardware and software resource limits Modifying the age interval Modifying the query interval (active MLD snooping mode only) Configuring the global MLD version Modifying the age interval Configuring report control Modifying the wait time before stopping traffic when receiving a leave message Modifying the multicast cache aging time Configuring report control Disabling error and warning messages Configuring the MLD mode for a VLAN Disabling MLD snooping for the VLAN Configuring the MLD version for the VLAN Disabling error and warning messages Configuring the MLD version for individual ports Configuring static groups Configuring static router ports Disabling static group proxy Configuring the MLD version for individual ports Enabling MLDv2 membership tracking and fast leave for the VLAN Configuring fast leave for MLDv1 Enabling MLDv2 membership tracking and fast leave for the VLAN Enabling fast convergence Displaying MLD snooping information Displaying MLD snooping error information Enabling fast convergence Displaying MLD group information Displaying MLD group information Displaying MLD snooping mcache information Displaying MLD snooping mcache information To display information about the software resources used, enter the following command. max mld-snoop-group-addr system-max mld-snoop-mcache IPv6 Multicast Traffic Reduction Displaying status of MLD snooping traffic Displaying status of MLD snooping traffic Displaying MLD snooping information by VLAN Displaying MLD snooping information by VLAN Clearing MLD snooping counters and mcache Clearing MLD counters on all VLANs Clearing the mcache on all VLANs Clearing the mcache on a specific VLAN Clearing traffic counters on a specific VLAN Disabling the flooding of unregistered IPv6 multicast frames in an MLD-snooping-enabled VLAN PIM6 SM traffic snooping overview Application examples of PIM6 SM traffic snooping Disabling the flooding of unregistered IPv6 multicast frames in an MLD-snooping-enabled VLAN IPv6 Multicast Traffic Reduction Configuration notes and limitations for PIM6 SM snooping Configuration notes and limitations for PIM6 SM snooping PIM6 SM snooping configuration Enabling or disabling PIM6 SM snooping PIM6 SM snooping configuration Enabling PIM6 SM snooping on a VLAN Disabling PIM6 SM snooping on a VLAN PIM6 SM snooping show commands Displaying PIM6 SM snooping information Enabling PIM6 SM snooping on a VLAN Displaying PIM6 SM snooping for a VLAN Displaying PIM6 SM snooping for a VLAN Page IPv4 Multicast Protocols Supported IPv4 Multicast Protocols features Page Overview of IP multicasting Multicast terms Support for Multicast Multi-VRF system-max command changes Overview of IP multicasting Changing global IP multicast parameters Concurrent support for multicast routing and snooping Show and clear command support Defining the maximum number of PIM cache entries Defining the maximum number of IGMP group addresses Defining the maximum number of PIM cache entries Changing IGMP V1 and V2 parameters Modifying IGMP (V1 and V2) query interval period Modifying IGMP (V1 and V2) membership time Modifying IGMP (V1 and V2) maximum response time Changing IGMP V1 and V2 parameters Adding an interface to a multicast group Security enhancement for IGMP Multicast non-stop routing Configuring multicast non-stop routing Multicast non-stop routing PIM v4 is configured PIM v6 is configured Displaying the multicast NSR status Displaying counter and statistic information for multicast NSR Displaying the multicast NSR status Passive multicast route insertion Passive multicast route insertion Configuring PMRI Displaying hardware-drop IP multicast boundaries Configuring PMRI Configuring multicast boundaries Standard ACL to permit multicast traffic Extended ACL to deny multicast traffic Extended ACL to permit multicast traffic Displaying multicast boundaries PIM Dense PIM Dense Initiating PIM multicasts on a network Pruning a multicast tree Initiating PIM multicasts on a network Page Grafts to a multicast tree Grafts to a multicast tree PIM DM versions Configuring PIM DM Enabling PIM on the device and an interface Globally enabling and disabling PIM Enabling PIM for a specified VRF Enabling a PIM version Modifying PIM global parameters Modifying neighbor timeout Modifying PIM global parameters Modifying hello timer Modifying prune timer Modifying the prune wait timer Modifying graft retransmit timer Modifying inactivity timer Failover time in a multi-path topology Failover time in a multi-path topology Configuring a DR priority Displaying basic PIM Dense configuration information Configuring a DR priority Displaying all multicast cache entries in a pruned state Syntax: show ip pim [vrf vrf-name ] prune Displaying all multicast cache entries You can use the following command to display all multicast cache entries. Displaying all multicast cache entries in a pruned state Page Page Output fields from the show ip pim mcache command (Continued)TABLE 1 Displaying information across VRFs Displaying information across VRFs PIM Sparse PIM Sparse device types PIM Sparse RP paths and SPT paths Configuring PIM Sparse RP paths and SPT paths Current limitations Configuring global PIM Sparse parameters Enabling PIM Sparse for a specified VRF Current limitations Configuring PIM interface parameters Configuring BSRs Configuring PIM interface parameters Configuring RPs Configuring RPs Updating PIM-Sparse forwarding entries with new RP configuration Statically specifying the RP ACL based RP assignment Configuration considerations: Configuring an ACL based RP assignment Displaying the static RP ACL based RP assignment PIM Passive Multicast Outgoing Interface (OIF) list optimization PIM Passive Displaying system values Displaying PIM resources Displaying system values Page Displaying PIM Sparse configuration information and statistics Displaying basic PIM Sparse configuration information Displaying PIM Sparse configuration information and statistics Page Output of the show ip pim sparse command (Continued)TABLE 4 Displaying a list of multicast groups To display PIM group information, enter the following command at any CLI level. Displaying a list of multicast groups Displaying BSR information To display BSR information, enter the following command at any CLI level. Displaying BSR information Output from the show ip pim bsr command TABLE 6 Displaying candidate RP information Displaying candidate RP information Output from the show ip pim rp-candidate command TABLE 7 Displaying RP-to-group mappings To display RP-to-group-mappings, enter the following command at any CLI level. Displaying RP-to-group mappings Displaying RP Information for a PIM Sparse group Displaying the RP set list Displaying RP Information for a PIM Sparse group Output from the show ip pim vrf rp-set command TABLE 10 Syntax: show ip pim [vrf vrf-name ] neighbor Displaying multicast neighbor information To display information about PIM neighbors, enter the following command at any CLI level. Displaying multicast neighbor information Output from the show ip pim vrf neighbor command TABLE 11 Displaying the PIM multicast cache To display the PIM multicast cache, enter the following command at any CLI level. Displaying the PIM multicast cache Page Page Output fields from the show ip pim mcache command (Continued)TABLE 12 Displaying the PIM multicast cache for DIT Displaying the PIM multicast cache for DIT Clearing the PIM forwarding cache You can clear the PIM forwarding cache using the following command. Displaying PIM traffic statistics To display PIM traffic statistics, enter the following command at any CLI level. Clearing the PIM forwarding cache Page Clearing the PIM message counters Clearing the PIM message counters Displaying PIM RPF Configuring Multicast Source Discovery Protocol (MSDP) Displaying PIM RPF Peer Reverse Path Forwarding (RPF) flooding Source Active caching Peer Reverse Path Forwarding (RPF) flooding Configuring MSDP Enabling MSDP Enabling MSDP for a specified VRF Configuring MSDP peers Configuring MSDP Disabling an MSDP peer Designating the interface IP address as the RP IP address Disabling an MSDP peer Filtering MSDP source-group pairs Filtering incoming and outgoing Source-Active messages Example Filtering MSDP source-group pairs Page Filtering advertised Source-Active messages Displaying MSDP information Displaying summary information Filtering advertised Source-Active messages Syntax: show ip msdp summary Displaying peer information To display MSDP peer information, enter the following command. Syntax: show ip msdp [vrf vrf-name ] peer MSDP peer information TABLE 15 Page MSDP peer information (Continued)TABLE 15 Displaying Source Active cache information Displaying MSDP RPF-Peer Displaying MSDP RPF-Peer Displaying MSDP Peer Displaying MSDP VRF RPF-Peer Clearing MSDP information Clearing peer information Clearing peer information on a VRF Configuring MSDP mesh groups Configuring MSDP mesh groups Configuring MSDP mesh group Configuring MSDP mesh group MSDP Anycast RP Configuring MSDP Anycast RP MSDP Anycast RP Example Example RP 1 configuration The following commands provide the configuration for the RP 1 router in Figure 8 . RP 2 configuration The following commands provide the configuration for the RP 2 router in Figure 8 . PIMR1 configuration The following commands provide the configuration for the PIMR1 router in Figure 8 . PIMR2 configuration PIM Anycast RP Configuring PIM Anycast RP PIM Anycast RP Displaying information for a PIM Anycast RP interface Displaying information for a PIM Anycast RP interface Static multicast routes Static multicast routes IGMP Proxy IGMP proxy configuration notes IGMP proxy limitations Configuring IGMP Proxy IGMP Proxy Filtering groups in proxy report messages Displaying IGMP Proxy information Filtering groups in proxy report messages Output of show ip igmp proxy TABLE 18 The report shows the following information. Output of show ip igmp proxy summary TABLE 19 Syntax: show ip igmp proxy stats Syntax: show ip igmp proxy summary IGMP V3 IGMP V3 Default IGMP version Compatibility with IGMP V1 and V2 Default IGMP version Globally enabling the IGMP version Enabling the IGMP version per interface setting Enabling the IGMP version on a physical port within a virtual routing interface Globally enabling the IGMP version Enabling membership tracking and fast leave Enabling membership tracking and fast leave Creating a static IGMP group Setting the query interval Creating a static IGMP group Setting the group membership time Setting the maximum response time Displaying IGMPv3 information Displaying IGMP group status Setting the group membership time Page Clearing the IGMP group membership table Displaying static IGMP groups Displaying the IGMP status of an interface Clearing the IGMP group membership table Page Displaying IGMP traffic status Clearing IGMP traffic statistics Clearing IGMP traffic statistics Displaying IGMP settings Source-specific multicast IGMP V3 and source specific multicast protocols Configuring PIM SSM group range Source-specific multicast Displaying source-specific multicast configuration information Configuring multiple SSM group ranges Configuration Considerations Displaying source-specific multicast configuration information Displaying information for PIM SSM range ACL IGMPv2 SSM mapping Displaying information for PIM SSM range ACL Configuring an ACL for IGMPv2 SSM mapping Configuring the IGMPv2 SSM mapping commands Enabling IGMPv2 SSM mapping Configuring the map between a IGMPv2 group address and a multicast source Configuring an ACL for IGMPv2 SSM mapping Example configuration Displaying an IGMP SSM mapping information Displaying an IGMP SSM mapping information IPv6 Multicast Protocols Supported IPv6 Multicast Features IPv6 PIM Sparse PIM Sparse router types IPv6 PIM Sparse RP paths and SPT paths RFC 3513 and RFC 4007 compliance for IPv6 multicast scope-based forwarding Configuring PIM Sparse RP paths and SPT paths IPv6 PIM-Sparse mode Configuring IPv6 PIM-SM on a virtual routing interface Enabling IPv6 PIM-SM for a specified VRF IPv6 PIM-Sparse mode Configuring BSRs Setting the BSR message interval Configuring BSRs Configuring candidate RP Statically specifying the RP Configuring candidate RP Updating IPv6 PIM Sparse forwarding entries with a new RP configuration Embedded Rendezvous Point Updating IPv6 PIM Sparse forwarding entries with a new RP configuration Changing the Shortest Path Tree threshold Setting the RP advertisement interval Changing the Shortest Path Tree threshold Changing the PIM Join and Prune message interval Modifying neighbor timeout Changing the PIM Join and Prune message interval Setting the prune wait interval Setting the register suppress interval Setting the register probe time Setting the prune wait interval Setting the inactivity timer Changing the hello timer Setting the inactivity timer Enabling Source-specific Multicast Configuring Source-specific Multicast Configuring a DR priority Enabling Source-specific Multicast Passive Multicast Route Insertion Configuring PMRI Displaying hardware-drop Passive Multicast Route Insertion Displaying system values Displaying PIM Sparse configuration information and statistics Displaying basic PIM Sparse configuration information Displaying system values Page Output from the show ipv6 pim sparse command (Continued)TABLE 26 Displaying IPv6 PIM interface information You can display IPv6 PIM multicast interface information using the show ipv6 pim interface command. Displaying IPv6 PIM interface information Displaying a list of multicast groups Displaying a list of multicast groups Displaying BSR information Displaying BSR information Output from the show ipv6 pim bsr command (Continued)TABLE 29 Displaying candidate RP information To display candidate RP information, enter the show ipv6 rp-candidate command at any CLI level. Displaying candidate RP information Displaying RP-to-group mappings Displaying RP-to-group mappings Displaying RP information for an IPv6 PIM Sparse group Displaying the RP set list Displaying RP information for an IPv6 PIM Sparse group Syntax: show ipv6 pim [ vrf vrf-name ] neighbor Displaying multicast neighbor information Displaying multicast neighbor information Displaying the IPv6 PIM multicast cache Displaying the IPv6 PIM multicast cache Page Displaying IPv6 PIM RPF Displaying IPv6 PIM counters Displaying IPv6 PIM RPF Displaying the IPv6 PIM resources Displaying the IPv6 PIM resources Page Displaying PIM traffic statistics Displaying PIM traffic statistics Clearing the IPv6 PIM forwarding cache Clearing the IPv6 PIM message counters Updating PIM Sparse forwarding entries witha new RP configuration Clearing the IPv6 PIM forwarding cache Clearing the IPv6 PIM traffic Defining the maximum number of IPv6 PIM cache entries Clearing the IPv6 PIM traffic Configuring a static multicast route within a VRF Configuring the route precedence by specifying the route types Configuring a static multicast route within a VRF PIM Anycast RP Configuring PIM Anycast RP PIM Anycast RP Page Displaying information for an IPv6 PIM Anycast RP interface Multicast Listener Discovery and source-specific multicast protocols Displaying information for an IPv6 PIM Anycast RP interface Enabling MLDv2 Configuring MLD parameters for default and non-default VRFs Setting the group membership time Enabling MLDv2 Defining the maximum number of MLD group addresses Setting the maximum response time Defining the maximum number of MLD group addresses Setting the query interval Setting the last listener query interval Setting the robustness Setting the query interval Setting the version Configuring MLD parameters at the interface level Specifying a port version Specifying a static group Setting the version Enabling MLD tracking on an interface Displaying MLD information Enabling MLD tracking on an interface Displaying MLD group information To display the list of multicast groups, enter a command such as the following. Displaying MLD definitions for an interface Displaying MLD group information Displaying MLD settings Displaying MLD settings Displaying static MLD groups Displaying static MLD groups Displaying MLD traffic Displaying MLD traffic Clearing IPv6 MLD traffic Clearing the IPv6 MLD group membership table cache IPv6 Multicast Boundaries Clearing IPv6 MLD traffic Configuring multicast boundaries ACL to permit multicast traffic ACL to deny multicast traffic Configuration considerations Displaying multicast boundaries Displaying multicast boundaries IP Multicast Commands clear ip mroute clear ipv6 mroute clear ipv6 mroute ip max-mroute ip mroute ip max-mroute ip mroute (next hop) ip mroute (next hop) ip mroute next-hop-enable-default ip mroute next-hop-enable-default ip mroute next-hop-recursion ip multicast disable-flooding ip mroute next-hop-recursion ipv6 max-mroute ipv6 mroute ipv6 max-mroute ipv6 mroute (next hop) ipv6 mroute (next hop) ipv6 mroute next-hop-enable-default ipv6 mroute next-hop-enable-default ipv6 mroute next-hop-recursion ipv6 multicast disable-flooding ipv6 mroute next-hop-recursion route-precedence route-precedence route-precedence admin-distance show ip mroute route-precedence admin-distance IP Multicast Commands show ip multicast optimization show ip static mroute show ip multicast optimization show ipv6 mroute show ipv6 mroute show ipv6 multicast optimization show ipv6 multicast optimization show ipv6 static mroute show ipv6 static mroute Page Index C F I M S V