3com corebuilder 10002211 Manual De Usuario

When you select the IGMP option, the interface prompts you to enable or 
disable IGMP snooping mode and IGMP query mode. Both are enabled by 
default. Under most conditions, IGMP snooping mode and IGMP query 
mode should remain enabled. 

To enable or disable IGMP, from the top level of the Administration Console, 
enter:

1 Enter the slot of the switching module for which you want to enable IGMP.

Select IP stack(s) by slot (2,3,7,9-12|all) [12]:

2 The interface prompts you to enable or disable IGMP query mode and IGMP 

snooping mode. If an IP interface has been defined on an EFSM or a TMM 
module in the CoreBuilder system, IGMP snooping mode is enabled by 
default. 

Slots 9-12 - Enter IGMP snooping mode (disabled, enabled) 

[enabled]: 

The IP multicast interface selections allow you to enable and disable 
multicast characteristics on previously defined IP interfaces. A multicast 
interface has three characteristics, explained next.

The DVMRP metric value determines the cost of a multicast interface. The 
higher the cost, the less likely it is that the packets will be routed over the 
interface. The default value is 1. 

The TTL threshold determines whether the interface will forward multicast 
packets to other switches and routers in the subnetwork. If the interface TTL 
is greater than the packet TTL, then the interface does not forward the 
packet. The default value is 1, which means that the interface will forward 
all packets.

system
ethernet
fddi
tokenring
bridge

➧

ip
ipx
appletalk
snmp
analyzer
script
logout

interface
route
arp

➧

multicast
udpHelper
routing
icmpRouterDiscovery
rip
ping
statistics

dvrmp

➧

igmp
interface
tunnel
routeDisplay
cacheDisplay