Multicast and Routing Guide K/KA/KB.15.15

Enabling multicast routing on the VLAN interface to which the CLI is currently set........................39
Specifying the IP address to use as the source address for PIM protocol packets outbound on the
VLAN...............................................................................................................................40
Changing the frequency at which the routing switch transmits PIM hello messages on the current
VLAN...............................................................................................................................40
Changing the maximum time in seconds before the routing switch actually transmits the initial PIM
hello message on the current VLAN......................................................................................41
Changing the interval the routing switch waits for the graft ack from another router before resending
the graft request.................................................................................................................41
Changing the number of times the routing switch retries sending the same graft packet to join a
flow.................................................................................................................................41
Enabling the LAN prune delay option on the current VLAN.....................................................42
Computing the lan-prune-delay setting..................................................................................42
Setting the multicast datagram time-to-live (router hop-count) threshold for the VLAN...................43
Example of configuring PIM-DM operation at the VLAN level...................................................43
Displaying PIM data and configuration settings...........................................................................45
Displaying PIM route data...................................................................................................45
Displays the PIM interfaces currently configured.....................................................................46
Viewing VLAN, protocol identity, and TTL settings..................................................................46
Viewing data for a specified flow (multicast group).................................................................47
Displaying PIM status.........................................................................................................50
Displaying PIM neighbor data.............................................................................................50
Variation......................................................................................................................51
Listing the PIM interfaces (VLANs) currently configured in the routing switch...............................51
Viewing the current configuration for the specified VLAN (PIM interface)....................................51
Viewing PIM-specific information from the IP multicast routing table (MRT)..................................53
Viewing the PIM route entry information for the specified multicast group (flow)..........................53
Listing PIM neighbor information for all PIM neighbors connected to the routing switch................54
About PIM-DM.......................................................................................................................55
PIM-DM features................................................................................................................55
PIM-DM operation..................................................................................................................56
Multicast flow management.................................................................................................57
Initial flood and prune...................................................................................................57
Maintaining the prune state............................................................................................57
State-refresh packets and bandwidth conservation.............................................................58
General configuration elements...........................................................................................58
About configuring PIM-DM.......................................................................................................59
Operating notes.....................................................................................................................59
PIM-DM operating rules......................................................................................................59
PIM routers without state-refresh messaging capability.............................................................59
Flow capacity....................................................................................................................59
IGMP traffic high-priority disabled........................................................................................60
ACLs and PIM...................................................................................................................60
When to enable IGMP on a VLAN.......................................................................................60
IP address removed............................................................................................................60
Troubleshooting......................................................................................................................60
Symptom: Noticeable slowdown in some multicast traffic.........................................................60
Heavy memory usage........................................................................................................60
IPv4 table operation...........................................................................................................60
Messages related to PIM operation...........................................................................................61
Applicable RFCs.....................................................................................................................63
Exceptions to Support for RFC 2932 - Multicast Routing MIB.........................................................63
3 PIM-SM (Sparse Mode).............................................................................65
Configuring router protocol independent multicast (PIM)...............................................................65
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