3Com 2500 manual Displaying the Multicast Cache, ip multicast cacheDisplay

Displaying the Multicast Cache 10-9

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-If1	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-If1	Set of interfaces on which the traffic will be flooded out. I repre-
	sents the interface.
1In-If and Out-If	Together, these attributes define a Spanning Tree configuration. Interfaces
	that comprise loops are disabled

Displaying the Multicast Cache

Top-Level Menu
system
	interface
ethernet
	route	dvmrp
fddi
	arp	igmp
atm
	atmArpServer	interfaces
bridge
	➧multicast	tunnel
➧ip
	udpHelper	routeDisplay
ipx
	routing	➧cacheDisplay
appletalk
	icmpRouterDiscovery
snmp
	rip
analyzer
	ping
script
	statistics
logout

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:

1From the top level of the Administration Console, enter:

ip multicast cacheDisplay

You are prompted for the multicast source address.

2Enter the multicast source subnetwork address. You are prompted for the multicast group address.

3Enter the multicast group address.

The DVMRP status and IGMP status appear on the screen.