Changing Global Ip Multicast Parameters; Defining The Maximum Number Of Dvmrp Cache Entries; Defining The Maximum Number Of Pim Cache Entries; Ip Multicast Boundaries - Dell PowerConnect B-RX Configuration Manual

23

Changing global IP multicast parameters

Leaf Nodes: Routers that do not have any downstream routers.
Multicast Tree: A unique tree is built for each source group (S,G) pair. A multicast tree is comprised
of a root node and one or more nodes that are leaf or intermediate nodes.
NOTE
Multicast protocols can only be applied to 1 physical interface. You must create multiple VLANs with
individual untagged ports and ve's under which you configure PIM.
Changing global IP multicast parameters
The sections below apply to PIM-DM, PIM-SM, and DVMRP.

Defining the maximum number of DVMRP cache entries

The DVMRP cache system parameter defines the maximum number of repeated DVMRP traffic
being sent from the same source address and being received by the same destination address. To
define this maximum, enter a command such as the following.
BigIron RX(config)# system-max dvmrp-mcache 500
Syntax: system-max dvmrp-mcache <num>
The <num> parameter specifies the maximum number of multicast cache entries for DVMRP.
Enter a number from 128 – 2048. The default is 512.

Defining the maximum number of PIM cache entries

The PIM cache system parameter defines the maximum number of repeated PIM traffic being sent
from the same source address and being received by the same destination address. To define this
maximum, enter a command such as the following.
BigIron RX(config)# system-max pim-mcache 999
Syntax: system-max pim-mcache <num>
The <num> parameter specifies the maximum number of multicast cache entries for PIM. Enter a
number from 256 – 4096. The default is 1024.

IP multicast boundaries

The Multicast Boundary feature is designed to selectively allow or disallow multicast flows to
configured interfaces.
The ip multicast-boundary command allows you to configure a boundary on PIM enabled interface
by defining which multicast groups may not forward packets over a specified interface. This
includes incoming and outgoing packets. By default, all interfaces that are enabled for multicast
are eligible to participate in a multicast flow provided they meet the multicast routing protocol's
criteria for participating in a flow.
582 BigIron RX Series Configuration Guide
53-1002253-01