3Com 9100 manual Types of VLANs, Port-Based VLANs

66CHAPTER 4: VIRTUAL LANS (VLANS)

Table 18 IGMP Configuration Commands (continued)

Command	Description
config igmp snooping timer	Configures the IGMP snooping timers. Timers
<router_timeout> <host_timeout>	should be set to approximately 2.5 times the
	router query interval in use on the network.
	Specify the following:
	■ router_timeout — The interval, in
	seconds, between the last time the router was
	discovered and the current time. The range is
	10 to 2,147,483,647 seconds (68 years). The
	default setting is 260 seconds.
	■ host_timeout — The interval, in seconds,
	between the last IGMP group report message
	from the host and the current time. The range
	is 10 to 2,147,483,647 seconds (68 years). The
	default setting is 260 seconds.
show igmp snooping {<vlan <name>}	Displays IGMP snooping registration information,
	and a summary of all IGMP timers and states.
disable igmp {vlan <name>}	Disables IGMP processing. No IGMP query is
	generated, but the switch continues to respond to
	IGMP queries received from other devices. If no
	VLAN is specified, IGMP is disabled on all
	interfaces.
disable igmp snooping	Disables IGMP snooping. IGMP snooping can be
	disabled only if IP multicast routing is not being
	used. Disabling IGMP snooping allows all IGMP
	and IP multicast traffic to flood within a given
	VLAN.
clear igmp snooping {vlan <name>}	Removes one or all IGMP snooping entries.

Types of VLANs	The switch supports a maximum of 256 VLANs. VLANs can be created
	according to the following criteria:
	■	Physical port
	■	802.1Q tag
	■ Ethernet, LLC SAP, or LLC/SNAP Ethernet protocol type
	■ A combination of these criteria
Port-Based VLANs	In a port-based VLAN, a VLAN name is given to a group of one or more
	ports on the switch. A port can be a member of only one port-based
	VLAN.