HP 3500YL - Manual (Page 152)

PIM-SM (Sparse Mode)
Displaying PIM-SM Data and Configuration Settings
Listing Data for an Active Multicast Group
Syntax: show ip mroute [< group-addr > < source-addr >]
Lists the following data for the specified flow (multicast
group):
Group Address: The multicast group IP address for the current
group.
Source Address: The source IP address
< source-ip-addr > for the
current group.
Source Mask: The subnet mask applied to the multicast source
address
< source-ip-addr >.
Neighbor: Lists the IP address of the upstream next-hop router
running PIM-SM; that is, the router from which the router is
receiving datagrams for the current multicast group. This
value is
0.0.0.0 if the router has not detected the upstream next-
hop router’s IP address. This field is empty if the multicast
server is directly connected to the router.
VLAN: Lists the VLAN ID (VID) on which the router received
the specified multicast flow.
Up Time (Sec): The elapsed time in seconds since the router
learned the information for the current instance of the indi­
cated multicast flow.
Expire Time (Sec): Indicates the remaining time in seconds
before the router ages-out the current flow (group member­
ship). This value decrements until:
• Reset by a state refresh packet originating from the
upstream multicast router. (The upstream multicast router
issues state refresh packets for the current group as long as
it either continues to receive traffic for the current flow or
receives state refresh packets for the current flow from
another upstream multicast router
.)
• Reset by a new flow for the current multicast group on the
VLAN
.
• The timer expires (reaches 0). In this case the switch has
not received either a state refresh packet or new traffic for
the current multicast group, and ages-out (drops) the group
entry
.
Multicast Routing Protocol: Identifies the IP multicast routing
protocol through which the current flow was learned.
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