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Displaying the Multicast Cache 10-9
Displaying the
Multicast Cache
The IP multicast cache contains the IP source address and destination
address for packets observed on the system. The multicast cache shows you
how information is routed over interfaces and ports in your system.
To display all learned routes in the multicast cache:
1 From the top level of the Administration Console, enter:
ip multicast cacheDisplay
You are prompted for the multicast source address.
2 Enter the multicast source subnetwork address.
You are prompted for the multicast group address.
3 Enter the multicast group address.
The DVMRP status and IGMP status appear on the screen.
Table 10-1 Field Attributes for Multicast route display
Field Description
Origin-Subnet The source address and the number of bits in the subnetwork
From-Gateway The interface address of the gateway
Metric The hop count
Tmr The amount of time, in seconds, since the routing table entry was
last reset
In-If
1
Interface number on which that gateway is connected. Traffic is
expected to originate on this interface.
T represents the tunnel; P denotes that a prune has been sent to
this tunnel.
Out-If
1
Set of interfaces on which the traffic will be flooded out. I repre-
sents the interface.
1
In-If and Out-If Together, these attributes define a Spanning Tree configuration. Interfaces
that comprise loops are disabled
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