Pim-dm operating rules – HP 3500YL User Manual
Page 72
PIM-DM (Dense Mode)
PIM-DM Operating Rules
Multicast Address:
In IP multicast traffic on the switch, this is a single IP
address that can be used by a group of related or unrelated clients wanting
the same data. A single S/G pair consists of unicast source address and a
multicast group address. Sometimes termed a “multicast group address”. See
also “Source” and “S/G Pair”.
Multicast Routing:
A method for transmitting multicast datagrams from a
source in one IP network to a multicast address in one or more other IP
networks.
PIM Neighbor:
On a routing switch configured for PIM operation, a PIM
neighbor is another PIM-configured routing switch or router that is either
directly connected to the first routing switch or connected through networked
switches and/or hubs.
Prune:
To eliminate branches of a multicast tree that have no hosts sending
joins to request or maintain membership in that particular multicast group.
S/G Pair:
The unicast address of the server transmitting the multicast traffic
and the multicast address to which the server is transmitting the traffic.
Source (S):
In IP multicast traffic on the switch, the source (S) is the unicast
address of the server transmitting the multicast traffic. A single S/G pair
consists of unicast source address and a multicast group address. See also
“S/G Pair”.
PIM-DM Operating Rules
■
The routing switch supports 2048 multicast flows in hardware. (For more
on this topic, refer to “Flow Capacity” on page 3-36.)
■
The multicast routing table (MRT) that PIM-DM creates allows up to 128
outbound VLANs, meaning that at any given time, PIM-DM supports
multicast routing across 128 VLANs.
■
The routing switch allows one instance of PIM per VLAN. Thus, in net
works using multinetted VLANs, all routers on a given VLAN intended to
route multicast packets must have a least one common subnet on that
VLAN. Thus, in the case of multinetting, you must select one subnet on
the multinetted VLAN to use for multicast routing. To facilitate this, the
routing switch provides a command for specifying which IP address PIM
will use on each VLAN.
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