C
HAPTER
17
| IGMP Commands
– 277 –
igmp fastleave
This command displays or sets IGMP fast leave for specified ports.
S
YNTAX
igmp fastleave
[
port-list
] [
enable
|
disable
]
port-list
- A specific port or range of ports. (Range: 1-28, or
all
)
enable
- Enables IGMP fast leave. If enabled, the switch
immediately deletes a member port of a multicast service if a leave
packet is received at that port.
disable
- Disables IGMP fast leave.
D
EFAULT
S
ETTING
Disabled
C
OMMAND
U
SAGE
◆
The switch can be configured to immediately delete a member port of a
multicast service if a leave packet is received at that port and the Fast
Leave function is enabled. This allows the switch to remove a port from
the multicast forwarding table without first having to send an IGMP
group-specific (GS) query to that interface.
◆
If Fast Leave is
not
used, a multicast router (or querier) will send a
GS-query message when an IGMPv2/v3 group leave message is
received. The router/querier stops forwarding traffic for that group only
if no host replies to the query within the specified time-out period.
◆
If Fast Leave is enabled, the switch assumes that only one host is
connected to the interface. Therefore, Fast Leave should only be
enabled on an interface if it is connected to only one IGMP-enabled
device, either a service host or a neighbor running IGMP snooping.
◆
Fast Leave is only effective if IGMP snooping is enabled, and IGMPv2 or
IGMPv3 snooping is used.
◆
Fast Leave does not apply to a port if the switch has learned that a
multicast router is attached to it.
◆
Fast Leave can improve bandwidth usage for a network which
frequently experiences many IGMP host add and leave requests.
E
XAMPLE
IGMP>fastleave 6-10 enable
IGMP>
Summary of Contents for 8028L2
Page 1: ...MANAGEMENT GUIDE TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Page 6: ...ABOUT THIS GUIDE 6 ...
Page 22: ...FIGURES 22 ...
Page 26: ...SECTION Getting Started 26 ...
Page 46: ...CHAPTER 2 Initial Switch Configuration Managing System Files 46 ...
Page 48: ...SECTION Web Configuration 48 ...
Page 144: ...CHAPTER 4 Configuring the Switch Configuring DHCP Relay and Option 82 Information 144 ...
Page 184: ...CHAPTER 6 Performing Basic Diagnostics Running Cable Diagnostics 184 ...
Page 238: ...CHAPTER 12 Port Commands 238 ...
Page 244: ...CHAPTER 13 Link Aggregation Commands 244 ...
Page 262: ...CHAPTER 15 RSTP Commands 262 ...
Page 272: ...CHAPTER 16 IEEE 802 1X Commands 272 ...
Page 282: ...CHAPTER 17 IGMP Commands 282 ...
Page 290: ...CHAPTER 18 LLDP Commands 290 ...
Page 296: ...CHAPTER 19 MAC Commands 296 ...
Page 306: ...CHAPTER 21 PVLAN Commands 306 ...
Page 318: ...CHAPTER 22 QoS Commands 318 ...
Page 352: ...CHAPTER 26 SNMP Commands 352 ...
Page 355: ...CHAPTER 27 HTTPS Commands 355 EXAMPLE HTTPS redirect enable HTTPS ...
Page 356: ...CHAPTER 27 HTTPS Commands 356 ...
Page 362: ...CHAPTER 29 UPnP Commands 362 ...
Page 370: ...CHAPTER 31 Firmware Commands 370 ...
Page 372: ...SECTION Appendices 372 ...
Page 386: ...GLOSSARY 386 ...
Page 391: ...INDEX 391 ...
Page 392: ...149100000079A R01 SMC8028L2 ...