H3C S5120-EI Series Installation manual

H3C S5120-EI Series Ethernet Switches
IP Multicast
Command Reference
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Document Version: 6W102-20100722
Product Version: Release 2202

Copyright © 2009-2010, Hangzhou H3C Technologies Co., Ltd. and its licensors
All Rights Reserved
No part of this manual may be reproduced or transmitted in any form or by any means without prior
written consent of Hangzhou H3C Technologies Co., Ltd.
Trademarks
H3C, , Aolynk, , H3Care, , TOP G, , IRF, NetPilot, Neocean, NeoVTL,
SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V2G, VnG, PSPT,
XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co.,
Ltd.
All other trademarks that may be mentioned in this manual are the property of their respective owners.
Notice
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface
The H3C S5120-EI documentation set includes 10 command references, which describe the
commands and command syntax options for the S5120-EI Release 2202.
The IP Multicast Command Reference describes multicast configuration commands. It covers the
commands for configuring IPv4 multicast and IPv6 multicast. With these multicast configuration
commands, you can implement efficient point-to-multipoint data transmission in your network.
This preface includes:
zAudience
zDocument Organization
zConventions
zAbout the H3C S5120-EI Documentation Set
zObtaining Documentation
zDocumentation Feedback
Audience
This documentation set is intended for:
zNetwork planners
zField technical support and servicing engineers
zNetwork administrators working with the S5120-EI series
Document Organization
The IP Multicast Command Reference comprises these parts:
IGMP Snooping
Configuration
Commands
Multicast VLAN
Configuration
Commands
MLD Snooping
Configuration
Commands
IPv6 Multicast VLAN
Configuration
Commands
Conventions
This section describes the conventions used in this documentation set.
Command conventions
Convention Description
Boldface Bold text represents commands and keywords that you enter literally as shown.
italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are
optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars,
from which you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical
bars, from which you select one or none.

Convention Description
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by
vertical bars, from which you select at least one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optional syntax choices separated by
vertical bars, from which you may select multiple choices or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&)
sign can be entered 1 to n times.
# A line that starts with a pound (#) sign is comments.
Symbols
Convention Description
Means reader be extremely careful. Improper operation may cause bodily
injury.
Means reader be careful. Improper operation may cause data loss or damage to
equipment.
Means a complementary description.
About the H3C S5120-EI Documentation Set
The H3C S5120-EI documentation set also includes:
Category Documents Purposes
Marketing brochures Describe product specifications and benefits.
Technology white papers Provide an in-depth description of software features
and technologies.
RPS User Manual Describes the appearances, features, and
specifications of the RPS units available for the
products.
RPS Ordering Information for
H3C Low-End Ethernet
Switches
Provides the RPS and switch compatibility matrix and
RPS cable specifications.
H3C Low End Series Ethernet
Switches Pluggable Modules
Manual
Describes the models, appearances, and
specifications of the pluggable modules available for
the products.
Product
description and
specifications
Interface Card User Manual Describes the appearance and specifications of the
interface card.
S5120-EI Series Ethernet
Switches Installation Manual
Provides a complete guide to hardware installation
and hardware specifications.
Provides regulatory information and the safety
instructions that must be followed during installation.
Pluggable SFP[SFP+][XFP]
Transceiver Modules Installation
Guide
Guides you through installing SFP/SFP+/XFP
transceiver modules.
Hardware
installation
Interface Card User Manual Describes how to install the interface card.
Software
configuration Configuration guides Describe software features and configuration
procedures.

Category Documents Purposes
Command references Provide a quick reference to all available commands.
H3C Series Ethernet Switches
Login Password Recovery
Manual
Tells how to find the lost password or recover the
password when the login password is lost.
Operations and
maintenance Release notes
Provide information about the product release,
including the version history, hardware and software
compatibility matrix, version upgrade information,
technical support information, and software upgrading.
Obtaining Documentation
You can access the most up-to-date H3C product documentation on the World Wide Web at
http://www.h3c.com.
Click the links on the top navigation bar to obtain different categories of product documentation:
[Technical Support & Documents > Technical Documents] – Provides hardware installation, software
upgrading, and software feature configuration and maintenance documentation.
[Products & Solutions] – Provides information about products and technologies, as well as solutions.
[Technical Support & Documents > Software Download] – Provides the documentation released with
the software version.
Documentation Feedback
You can e-mail your comments about product documentation to [email protected].
We appreciate your comments.

i
Table of Contents
1 IGMP Snooping Configuration Commands ····························································································1-1
IGMP Snooping Configuration Commands·····························································································1-1
display igmp-snooping group ··········································································································1-1
display igmp-snooping statistics······································································································1-2
fast-leave (IGMP-Snooping view)····································································································1-3
group-policy (IGMP-Snooping view)································································································1-4
host-aging-time (IGMP-Snooping view) ··························································································1-5
igmp-snooping·································································································································1-6
igmp-snooping drop-unknown·········································································································1-6
igmp-snooping enable·····················································································································1-7
igmp-snooping fast-leave················································································································1-7
igmp-snooping general-query source-ip··························································································1-8
igmp-snooping group-limit···············································································································1-9
igmp-snooping group-policy··········································································································1-10
igmp-snooping host-aging-time·····································································································1-11
igmp-snooping host-join ················································································································1-11
igmp-snooping last-member-query-interval···················································································1-12
igmp-snooping max-response-time·······························································································1-13
igmp-snooping overflow-replace ···································································································1-14
igmp-snooping querier···················································································································1-14
igmp-snooping query-interval········································································································1-15
igmp-snooping router-aging-time ··································································································1-16
igmp-snooping source-deny··········································································································1-16
igmp-snooping special-query source-ip·························································································1-17
igmp-snooping static-group···········································································································1-18
igmp-snooping static-router-port ···································································································1-19
igmp-snooping version ··················································································································1-19
last-member-query-interval (IGMP-Snooping view)······································································1-20
max-response-time (IGMP-Snooping view) ··················································································1-21
overflow-replace (IGMP-Snooping view)·······················································································1-21
report-aggregation (IGMP-Snooping view) ···················································································1-22
reset igmp-snooping group············································································································1-22
reset igmp-snooping statistics·······································································································1-23
router-aging-time (IGMP-Snooping view)······················································································1-23
source-deny (IGMP-Snooping view) ·····························································································1-24
2 Multicast VLAN Configuration Commands·····························································································2-1
Multicast VLAN Configuration Commands······························································································2-1
display multicast-vlan ······················································································································2-1
multicast-vlan···································································································································2-2
port (multicast VLAN view)··············································································································2-2
port multicast-vlan ···························································································································2-3

ii
subvlan (multicast VLAN view)········································································································2-4
3 MLD Snooping Configuration Commands······························································································3-1
MLD Snooping Configuration Commands ······························································································3-1
display mld-snooping group ············································································································3-1
display mld-snooping statistics········································································································3-2
fast-leave (MLD-Snooping view)·····································································································3-3
group-policy (MLD-Snooping view)·································································································3-4
host-aging-time (MLD-Snooping view)····························································································3-5
last-listener-query-interval (MLD-Snooping view) ···········································································3-6
max-response-time (MLD-Snooping view)······················································································3-6
mld-snooping···································································································································3-7
mld-snooping enable·······················································································································3-8
mld-snooping fast-leave ··················································································································3-8
mld-snooping general-query source-ip····························································································3-9
mld-snooping group-limit···············································································································3-10
mld-snooping group-policy ············································································································3-11
mld-snooping host-aging-time·······································································································3-12
mld-snooping host-join ··················································································································3-12
mld-snooping last-listener-query-interval ······················································································3-13
mld-snooping max-response-time·································································································3-14
mld-snooping overflow-replace ·····································································································3-15
mld-snooping querier·····················································································································3-16
mld-snooping query-interval··········································································································3-16
mld-snooping router-aging-time ····································································································3-17
mld-snooping source-deny············································································································3-17
mld-snooping special-query source-ip···························································································3-18
mld-snooping static-group·············································································································3-19
mld-snooping static-router-port ·····································································································3-20
mld-snooping version ····················································································································3-21
overflow-replace (MLD-Snooping view) ························································································3-21
report-aggregation (MLD-Snooping view)·····················································································3-22
reset mld-snooping group··············································································································3-23
reset mld-snooping statistics·········································································································3-23
router-aging-time (MLD-Snooping view) ·······················································································3-24
source-deny (MLD-Snooping view)·······························································································3-24
4 IPv6 Multicast VLAN Configuration Commands ····················································································4-1
IPv6 Multicast VLAN Configuration Commands ·····················································································4-1
display multicast-vlan ipv6···············································································································4-1
multicast-vlan ipv6···························································································································4-2
port (IPv6 multicast VLAN view)······································································································4-2
port multicast-vlan ipv6····················································································································4-3
subvlan (IPv6 multicast VLAN view)································································································4-4
5 Index ···························································································································································5-1

1-1
1 IGMP Snooping Configuration Commands
IGMP Snooping Configuration Commands
display igmp-snooping group
Syntax
display igmp-snooping group [ vlan vlan-id ] [ slot slot-number ] [ verbose ]
View
Any view
Default Level
1: Monitor level
Parameters
vlan vlan-id: Displays the IGMP Snooping multicast group information in the specified VLAN, where
vlan-id is in the range of 1 to 4094. If you do not specify a VLAN, this command will display the IGMP
Snooping multicast group information in all VLANs.
slot slot-number: Displays information about IGMP Snooping multicast groups on the specified IRF
member device. The slot-number argument is the member number of the device in the IRF, which you
can display with the display irf command. The value range for the slot-number argument depends on
the number of members and numbering conditions in the current IRF. If no IRF exists, the slot-number
argument is the current device number.
verbose: Specifies to display the detailed IGMP Snooping multicast group information.
Description
Use the display igmp-snooping group command to view the IGMP Snooping multicast group
information.
Examples
# View the detailed IGMP Snooping multicast group information in VLAN 2.
<Sysname> display igmp-snooping group vlan 2 verbose
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):2.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
GE1/0/1 (D) ( 00:01:30 )
IP group(s):the following ip group(s) match to one mac group.

1-2
IP group address:224.1.1.1
(0.0.0.0, 224.1.1.1):
Attribute: Host Port
Host port(s):total 1 port.
GE1/0/2 (D) ( 00:03:23 )
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 1 port.
GE1/0/2
Table 1-1 display igmp-snooping group command output description
Field Description
Total 1 IP Group(s). Total number of IP multicast groups
Total 1 IP Source(s). Total number of multicast sources
Total 1 MAC Group(s). Total number of MAC multicast groups
Port flags: D-Dynamic port,
S-Static port, C-Copy port
Port flags: D for dynamic port, S for static port, C for port copied from a
(*, G) entry to an (S, G) entry
Subvlan flags: R-Real VLAN,
C-Copy VLAN
Sub-VLAN flags: R for real egress sub-VLAN under the current entry, C
for sub-VLAN copied from a (*, G) entry to an (S, G) entry
Router port(s) Number of router ports
( 00:01:30 ) Remaining time of the dynamic member port or router port aging timer.
IP group address Address of IP multicast group
(0.0.0.0, 224.1.1.1) An (S, G), where 0.0.0.0 implies any multicast source
MAC group address Address of MAC multicast group
Attribute Attribute of IP multicast group
Host port(s) Number of member ports
display igmp-snooping statistics
Syntax
display igmp-snooping statistics
View
Any view
Default Level
1: Monitor level
Parameters
None

1-3
Description
Use the display igmp-snooping statistics command to view the statistics information of IGMP
messages learned by IGMP Snooping.
Examples
# View the statistics information of IGMP messages learned by IGMP Snooping.
<Sysname> display igmp-snooping statistics
Received IGMP general queries:0.
Received IGMPv1 reports:0.
Received IGMPv2 reports:19.
Received IGMP leaves:0.
Received IGMPv2 specific queries:0.
Sent IGMPv2 specific queries:0.
Received IGMPv3 reports:1.
Received IGMPv3 reports with right and wrong records:0.
Received IGMPv3 specific queries:0.
Received IGMPv3 specific sg queries:0.
Sent IGMPv3 specific queries:0.
Sent IGMPv3 specific sg queries:0.
Received error IGMP messages:19.
Table 1-2 display igmp-snooping statistics command output description
Field Description
general queries General query messages
specific queries Group-specific query messages
reports Report messages
leaves Leave messages
reports with right and wrong records Report messages with correct and incorrect records
specific sg query packet(s) Group-and-source-specific query message(s)
error IGMP messages IGMP messages with errors
fast-leave (IGMP-Snooping view)
Syntax
fast-leave [ vlan vlan-list ]
undo fast-leave [ vlan vlan-list ]
View
IGMP-Snooping view
Default Level
2: System level

1-4
Parameters
vlan vlan-list: Defines one or multiple VLANs. You can provide up to 10 VLAN lists, by each of which
you can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id
to end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The effective range of
a VLAN ID is 1 to 4094.
Description
Use the fast-leave command to enable fast leave processing globally. With this function enabled,
when the switch receives an IGMP leave message on a port, it directly removes that port from the
multicast forwarding entry of the specific group.
Use the undo fast-leave command to disable fast leave processing globally.
By default, fast leave processing is disabled.
Note that:
zThis command works on IGMP Snooping–enabled VLANs.
zIf you do not specify any VLAN, the command will take effect for all VLANs; if you specify a VLAN
or multiple VLANs, the command will take effect for the specified VLAN(s) only.
Related commands: igmp-snooping fast-leave.
Examples
# Enable fast leave processing globally in VLAN 2.
<Sysname> system-view
[Sysname] igmp-snooping
[Sysname-igmp-snooping] fast-leave vlan 2
group-policy (IGMP-Snooping view)
Syntax
group-policy acl-number [ vlan vlan-list ]
undo group-policy [ vlan vlan-list ]
View
IGMP-Snooping view
Default Level
2: System level
Parameters
acl-number: Basic or advanced ACL number, in the range of 2000 to 3999. The source address or
address range specified in the advanced ACL rule is used to match the multicast source address(es)
specified in IGMPv3 reports, rather than the source address in the IP packets. The system assumes
that an IGMPv1 or IGMPv2 report or an IGMPv3 IS_EX or TO_EX report that does not carry a
multicast source address carries a multicast source address of 0.0.0.0.
vlan vlan-list: Defines one or multiple VLANs. You can provide up to 10 VLAN lists, by each of which
you can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id
to end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The effective range of
a VLAN ID is 1 to 4094.

1-5
Description
Use the group-policy command to configure a global multicast group filter, namely to control the
multicast groups a host can join.
Use the undo group-policy command to remove the configured global multicast group filter.
By default, no global multicast group filter is configured, namely a host can join any valid multicast
group.
Note that:
zIf you do not specify any VLAN, the command will take effect for all VLANs; if you specify a VLAN
or multiple VLANs, the command will take effect for the specified VLAN(s) only.
zIf the specified ACL does not exist or the ACL rule is null, all multicast groups will be filtered out.
zYou can configure different ACL rules for a port in different VLANs; for a given VLAN, a newly
configured ACL rule will override the existing one.
Related commands: igmp-snooping group-policy.
Examples
# Apply ACL 2000 as a multicast group filter in VLAN 2 so that hosts in this VLAN can join 225.1.1.1
only.
<Sysname> system-view
[Sysname] acl number 2000
[Sysname-acl-basic-2000] rule permit source 225.1.1.1 0
[Sysname-acl-basic-2000] quit
[Sysname] igmp-snooping
[Sysname-igmp-snooping] group-policy 2000 vlan 2
host-aging-time (IGMP-Snooping view)
Syntax
host-aging-time interval
undo host-aging-time
View
IGMP-Snooping view
Default Level
2: System level
Parameters
interval: Dynamic member port aging time, in seconds. The effective range is 200 to 1,000.
Description
Use the host-aging-time command to configure the aging time of dynamic member ports globally.
Use the undo host-aging-time command to restore the default setting.
By default, the aging time of dynamic member ports is 260 seconds.
This command works on IGMP Snooping–enabled VLANs.
Related commands: igmp-snooping host-aging-time.
Examples
# Set the aging time of dynamic member ports globally to 300 seconds.

1-6
<Sysname> system-view
[Sysname] igmp-snooping
[Sysname-igmp-snooping] host-aging-time 300
igmp-snooping
Syntax
igmp-snooping
undo igmp-snooping
View
System view
Default Level
2: System level
Parameters
None
Description
Use the igmp-snooping command to enable IGMP Snooping globally and enter IGMP-Snooping view.
Use the undo igmp-snooping command to disable IGMP Snooping globally.
By default, IGMP Snooping is disabled.
Related commands: igmp-snooping enable.
Examples
# Enable IGMP Snooping globally and enter IGMP-Snooping view.
<Sysname> system-view
[Sysname] igmp-snooping
[Sysname-igmp-snooping]
igmp-snooping drop-unknown
Syntax
igmp-snooping drop-unknown
undo igmp-snooping drop-unknown
View
VLAN view
Default Level
2: System level
Parameters
None
Description
Use the igmp-snooping drop-unknown command to enable the function of dropping unknown
multicast data in the current VLAN, so that such multicast data will only be forwarded to router ports.
Use the undo igmp-snooping drop-unknown command to disable the function of dropping unknown
multicast data in the current VLAN.

1-7
By default, this function is disabled, that is, unknown multicast data is flooded.
This command takes effect only if IGMP Snooping is enabled in the VLAN.
Examples
# In VLAN 2, enable the function of dropping unknown multicast data.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping drop-unknown
igmp-snooping enable
Syntax
igmp-snooping enable
undo igmp-snooping enable
View
VLAN view
Default Level
2: System level
Parameters
None
Description
Use the igmp-snooping enable command to enable IGMP Snooping in the current VLAN.
Use the undo igmp-snooping enable command to disable IGMP Snooping in the current VLAN.
By default, IGMP Snooping is disabled in a VLAN.
IGMP Snooping must be enabled globally before it can be enabled in a VLAN.
Related commands: igmp-snooping.
Examples
# Enable IGMP Snooping in VLAN 2.
<Sysname> system-view
[Sysname] igmp-snooping
[Sysname-igmp-snooping] quit
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping enable
igmp-snooping fast-leave
Syntax
igmp-snooping fast-leave [ vlan vlan-list ]
undo igmp-snooping fast-leave [ vlan vlan-list ]
View
Ethernet port view, Layer 2 aggregate port view, port group view
Default Level
2: System level

1-8
Parameters
vlan vlan-list: Defines one or multiple VLANs. You can provide up to 10 VLAN lists, by each of which
you can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id
to end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The effective range of
a VLAN ID is 1 to 4094.
Description
Use the igmp-snooping fast-leave command to enable fast leave processing on the current port or
group of ports. With this function enabled, when the switch receives an IGMP leave message on a port,
it directly removes that port from the multicast forwarding entry of the specific group.
Use the undo igmp-snooping fast-leave command to disable fast leave processing on the current
port or group of ports.
By default, fast leave processing is disabled.
Note that:
zThis command works on IGMP Snooping–enabled VLANs.
zIf you do not specify any VLAN when using this command in Ethernet port view or Layer 2
aggregate port view, the command will take effect for all VLANs the port belongs to; if you specify
a VLAN or multiple VLANs, the command will take effect only if the port belongs to the specified
VLAN(s).
zIf you do not specify any VLAN when using this command in port group view, the command will
take effect on all the ports in this group; if you specify a VLAN or multiple VLANs, the command
will take effect only on those ports in this group that belong to the specified VLAN(s).
Related commands: fast-leave.
Examples
# Enable fast leave processing on GigabitEthernet1/0/1 in VLAN 2.
<Sysname> system-view
[Sysname] interface gigabitethernet1/0/1
[Sysname-GigabitEthernet1/0/1] igmp-snooping fast-leave vlan 2
igmp-snooping general-query source-ip
Syntax
igmp-snooping general-query source-ip { current-interface | ip-address }
undo igmp-snooping general-query source-ip
View
VLAN view
Default Level
2: System level
Parameters
current-interface: Sets the source address of IGMP general queries to the address of the current
VLAN interface. If the current VLAN interface does not have an IP address, the default IP address
0.0.0.0 will be used as the source IP address of IGMP general queries.
ip-address: Specifies the source address of IGMP general queries, which can be any legal IP address.

1-9
Description
Use the igmp-snooping general-query source-ip command to configure the source address of
IGMP general queries.
Use the undo igmp-snooping general-query source-ip command to restore the default
configuration.
By default, the source IP address of IGMP general queries is 0.0.0.0.
This command takes effect only if IGMP Snooping is enabled in the VLAN.
Examples
# In VLAN 2 specify 10.1.1.1 as the source IP address of IGMP general queries.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping general-query source-ip 10.1.1.1
igmp-snooping group-limit
Syntax
igmp-snooping group-limit limit [ vlan vlan-list ]
undo igmp-snooping group-limit [ vlan vlan-list ]
View
Ethernet port view, Layer 2 aggregate port view, port group view
Default Level
2: System level
Parameters
limit: Maximum number of multicast groups that can be joined on a port. The effective range is 1 to
1000.
vlan vlan-list: Defines one or multiple VLANs. You can provide up to 10 VLAN lists, by each of which
you can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id
to end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The effective range of
a VLAN ID is 1 to 4094.
Description
Use the igmp-snooping group-limit command to configure the maximum number of multicast groups
that can be joined on a port.
Use the undo igmp-snooping group-limit command to restore the default setting.
The default the maximum number of multicast groups is 1000.
Note that:
zIf you do not specify any VLAN when using this command in Ethernet port view or Layer 2
aggregate port view, the command will take effect for all VLANs the port belongs to; if you specify
a VLAN or multiple VLANs, the command will take effect only if the port belongs to the specified
VLAN(s).
zIf you do not specify any VLAN when using this command in port group view, the command will
take effect on all the ports in this group; if you specify a VLAN or multiple VLANs, the command
will take effect only on those ports in this group that belong to the specified VLAN(s).

1-10
Examples
# Specify to allow a maximum of 10 multicast groups to be joined on GigabitEthernet1/0/1 in VLAN 2.
<Sysname> system-view
[Sysname] interface gigabitethernet1/0/1
[Sysname-GigabitEthernet1/0/1] igmp-snooping group-limit 10 vlan 2
igmp-snooping group-policy
Syntax
igmp-snooping group-policy acl-number [ vlan vlan-list ]
undo igmp-snooping group-policy [ vlan vlan-list ]
View
Ethernet port view, Layer 2 aggregate port view, port group view
Default Level
2: System level
Parameters
acl-number: Basic or advanced ACL number, in the range of 2000 to 3999. The source address or
address range specified in the advanced ACL rule is used to match the multicast source address(es)
specified in IGMPv3 reports, rather than the source address in the IP packets. The system assumes
that an IGMPv1 or IGMPv2 report or an IGMPv3 IS_EX and TO_EX report that does not carry a
multicast source address carries a multicast source address of 0.0.0.0.
vlan vlan-list: Defines one or multiple VLANs. You can provide up to 10 VLAN lists, by each of which
you can specify an individual VLAN in the form of vlan-id, or a VLAN range in the form of start-vlan-id
to end-vlan-id, where the end VLAN ID must be greater than the start VLAN ID. The effective range of
a VLAN ID is 1 to 4094.
Description
Use the igmp-snooping group-policy command to configure a multicast group filter on the current
port(s), namely to control the multicast groups hosts on the port(s) can join.
Use the undo igmp-snooping group-policy command to remove a multicast group filter on the
current port(s).
By default, no multicast group filter is configured on a port, namely a host can join any valid multicast
group.
Note that:
zIf you do not specify any VLAN when using this command in Ethernet port view or Layer 2
aggregate port view, the command will take effect for all VLANs the port belongs to; if you specify
a VLAN or multiple VLANs, the command will take effect only if the port belongs to the specified
VLAN(s).
zIf you do not specify any VLAN when using this command in port group view, the command will
take effect on all the ports in this group; if you specify a VLAN or multiple VLANs, the command
will take effect only on those ports in this group that belong to the specified VLAN(s).
zIf the specified ACL does not exist or the ACL rule is null, all multicast groups will be filtered out.
zYou can configure different ACL rules for a port in different VLANs; for a given VLAN, a newly
configured ACL rule will override the existing one.

1-11
Related commands: group-policy.
Examples
# Apply ACL 2000 as a multicast group filter so that hosts on GigabitEthernet 1/0/1 in VLAN 2 can join
225.1.1.1 only.
<Sysname> system-view
[Sysname] acl number 2000
[Sysname-acl-basic-2000] rule permit source 225.1.1.1 0
[Sysname-acl-basic-2000] quit
[Sysname] interface gigabitethernet1/0/1
[Sysname-GigabitEthernet1/0/1] igmp-snooping group-policy 2000 vlan 2
igmp-snooping host-aging-time
Syntax
igmp-snooping host-aging-time interval
undo igmp-snooping host-aging-time
View
VLAN view
Default Level
2: System level
Parameters
interval: Dynamic member port aging time, in seconds. The effective range is 200 to 1,000.
Description
Use the igmp-snooping host-aging-time command to configure the aging time of dynamic member
ports in the current VLAN.
Use the undo igmp-snooping host-aging-time command to restore the default setting.
By default, the aging time of dynamic member ports is 260 seconds.
This command takes effect only if IGMP Snooping is enabled in the VLAN.
Related commands: host-aging-time.
Examples
# Set the aging time of dynamic member ports to 300 seconds in VLAN 2.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping host-aging-time 300
igmp-snooping host-join
Syntax
igmp-snooping host-join group-address [ source-ip source-address ] vlan vlan-id
undo igmp-snooping host-join group-address [ source-ip source-address ] vlan vlan-id
View
Ethernet port view, Layer 2 aggregate port view, port group view

1-12
Default Level
2: System level
Parameters
group-address: Address of the multicast group that the simulated host is to join, in the range of
224.0.1.0 to 239.255.255.255.
source-address: Address of the multicast source that the simulated host is to join. The value of this
argument should be a valid unicast address or 0.0.0.0. If the value is 0.0.0.0, this means that no
multicast source is specified.
vlan vlan-id: Specifies the VLAN that comprises the port(s), where vlan-id is in the range of 1 to 4094.
Description
Use the igmp-snooping host-join command to configure the current port(s) as simulated member
host(s), namely configure the current port as a member host for the specified multicast group or source
and group.
Use the undo igmp-snooping host-join command to remove the current port(s) as simulated
member host(s) for the specified multicast group or source and group.
By default, this function is disabled.
Note that:
zThis command works on IGMP Snooping–enabled VLANs. The version of IGMP on the simulated
host depends on the version of IGMP Snooping running in the VLAN.
zThe source-ip source-address option in the command is meaningful only for IGMP Snooping
version 3. If IGMP Snooping version 2 is running, although you can include source-ip
source-address in the command, the simulated host does not respond to a query message.
zIf configured in Ethernet port view or Layer 2 aggregate port view, this feature takes effect only if
the port belongs to the specified VLAN.
zIf configured in port group view, this feature takes effect only on those ports in this port group that
belong to the specified VLAN.
Examples
# Configure GIgabitEthernet1/0/1 as a simulated member host in VLAN 2 for multicast source 1.1.1.1
and multicast group 232.1.1.1.
<Sysname> system-view
[Sysname] igmp-snooping
[Sysname-igmp-snooping] quit
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping enable
[Sysname-vlan2] igmp-snooping version 3
[Sysname-vlan2] quit
[Sysname] interface gigabitethernet1/0/1
[Sysname-GigabitEthernet1/0/1] igmp-snooping host-join 232.1.1.1 source-ip 1.1.1.1 vlan 2
igmp-snooping last-member-query-interval
Syntax
igmp-snooping last-member-query-interval interval
undo igmp-snooping last-member-query-interval

1-13
View
VLAN view
Default Level
2: System level
Parameters
interval: Interval between IGMP last-member queries, in seconds. The effective range is 1 to 5.
Description
Use the igmp-snooping last-member-query-interval command to configure the interval between
IGMP last-member queries in the VLAN.
Use the undo igmp-snooping last-member-query-interval command to restore the default setting.
By default, the IGMP last-member query interval is 1 second.
This command takes effect only if IGMP Snooping is enabled in the VLAN.
Related commands: last-member-query-interval.
Examples
# Set the interval between IGMP last-member queries to 3 seconds in VLAN 2.
<Sysname> system-view
[Sysname] vlan 2
[Sysname-vlan2] igmp-snooping last-member-query-interval 3
igmp-snooping max-response-time
Syntax
igmp-snooping max-response-time interval
undo igmp-snooping max-response-time
View
VLAN view
Default Level
2: System level
Parameters
interval: Maximum response time to IGMP general queries, in seconds. The effective range is 1 to 25.
Description
Use the igmp-snooping max-response-time command to configure the maximum response time to
IGMP general queries in the VLAN.
Use the undo igmp-snooping max-response-time command to restore the default setting.
By default, the maximum response time to IGMP general queries is 10 seconds.
This command takes effect only if IGMP Snooping is enabled in the VLAN.
Related commands: max-response-time, igmp-snooping query-interval.
Examples
# Set the maximum response time to IGMP general queries to 5 seconds in VLAN 2.
<Sysname> system-view