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viii OmniSwitch 6800/6850/9000 Advanced Routing Configuration Guide December 2007
Chapter 6 Configuring DVMRP ...................................................................................................6-1
In This Chapter ................................................................................................................6-1
DVMRP Specifications ...................................................................................................6-2
DVMRP Defaults ............................................................................................................6-2
Quick Steps for Configuring DVMRP ............................................................................6-3
DVMRP Overview ..........................................................................................................6-5
Reverse Path Multicasting ........................................................................................6-5
Neighbor Discovery .................................................................................................6-6
Multicast Source Location, Route Report Messages, and Metrics ..........................6-7
Dependent Downstream Routers and Poison Reverse .............................................6-7
Pruning Multicast Traffic Delivery ..........................................................................6-8
Grafting Branches Back onto the Multicast Delivery Tree ......................................6-8
DVMRP Tunnels ......................................................................................................6-9
Configuring DVMRP ....................................................................................................6-10
Enabling DVMRP on the Switch ...........................................................................6-10
Loading DVMRP into Memory .......................................................................6-10
Enabling DVMRP on a Specific Interface ......................................................6-11
Viewing DVMRP Status and Parameters for a Specific Interface ..................6-12
Globally Enabling DVMRP on the Switch .....................................................6-12
Checking the Current Global DVMRP Status .................................................6-12
Automatic Loading and Enabling of DVMRP Following a System Boot ......6-13
Neighbor Communications ....................................................................................6-13
Routes .....................................................................................................................6-14
Pruning ...................................................................................................................6-15
More About Prunes ..........................................................................................6-15
Grafting ..................................................................................................................6-17
Tunnels ...................................................................................................................6-17
Verifying the DVMRP Configuration ...........................................................................6-18
Chapter 7 Configuring PIM ..........................................................................................................7-1
In This Chapter ................................................................................................................7-1
PIM Specifications ..........................................................................................................7-3
PIM Defaults ...................................................................................................................7-4
Quick Steps for Configuring PIM-DM ...........................................................................7-6
PIM Overview .................................................................................................................7-8
PIM-Sparse Mode (PIM-SM) ...................................................................................7-8
Rendezvous Points (RPs) ..................................................................................7-8
Bootstrap Routers (BSRs) .................................................................................7-9
Designated Routers (DRs) .................................................................................7-9
Shared (or RP) Trees .........................................................................................7-9
Avoiding Register Encapsulation ....................................................................7-12
PIM-Dense Mode (PIM-DM) .................................................................................7-12
RP Initiation of (S, G) Source-Specific Join Message ...........................................7-13
SPT Switchover ......................................................................................................7-15
Configuring PIM ...........................................................................................................7-18