H3C S3600 Series Command Manual

Command Manual – Multicast

H3C S3600 Series Ethernet Switches-Release 1510 Table of Contents

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Table of Contents

Chapter 1 IGMP Snooping Configuration Commands............................................................... 1-1

1.1 IGMP Snooping Configuration Commands .......................................................................1-1

1.1.1 display igmp-snooping configuration.......................................................................1-1

1.1.2 display igmp-snooping group..................................................................................1-2

1.1.3 display igmp-snooping statistics..............................................................................1-3

1.1.4 igmp-snooping.........................................................................................................1-4

1.1.5 igmp-snooping fast-leave........................................................................................1-5

1.1.6 igmp-snooping general-query source-ip .................................................................1-6

1.1.7 igmp-snooping group-limit.......................................................................................1-7

1.1.8 igmp-snooping group-policy....................................................................................1-8

1.1.9 igmp-snooping host-aging-time.............................................................................1-10

1.1.10 igmp-snooping max-response-time.....................................................................1-11

1.1.11 igmp-snooping querier ........................................................................................1-12

1.1.12 igmp-snooping query-interval..............................................................................1-12

1.1.13 igmp-snooping router-aging-time........................................................................1-13

1.1.14 reset igmp-snooping statistics.............................................................................1-14

1.1.15 service-type multicast..........................................................................................1-14

Chapter 2 Common IP Multicast Configuration Commands.....................................................2-1

2.1 Common IP Multicast Configuration Commands............................................................... 2-1

2.1.1 display mpm forwarding-table.................................................................................2-1

2.1.2 display mpm group..................................................................................................2-2

2.1.3 display multicast forwarding-table...........................................................................2-3

2.1.4 display multicast routing-table.................................................................................2-5

2.1.5 display multicast-source-deny.................................................................................2-6

2.1.6 multicast route-limit .................................................................................................2-7

2.1.7 multicast routing-enable..........................................................................................2-8

2.1.8 multicast-source-deny.............................................................................................2-9

2.1.9 reset multicast forwarding-table............................................................................2-10

2.1.10 reset multicast routing-table................................................................................2-11

Chapter 3 Multicast MAC Address Entry Configuration Commands.......................................3-1

3.1 Multicast MAC Address Entry Configuration Commands..................................................3-1

3.1.1 mac-address multicast interface .............................................................................3-1

3.1.2 mac-address multicast vlan.....................................................................................3-2

3.1.3 display mac-address multicast static.......................................................................3-2

Chapter 4 Unknown Multicast Drop Configuration Command.................................................4-1

4.1 Unknown Multicast Drop Configuration Command............................................................4-1

4.1.1 unknown-multicast drop enable ..............................................................................4-1

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Chapter 5 IGMP Configuration Commands................................................................................5-1

5.1 IGMP Configuration Commands........................................................................................5-1

5.1.1 display igmp group..................................................................................................5-1

5.1.2 display igmp interface .............................................................................................5-2

5.1.3 igmp enable.............................................................................................................5-3

5.1.4 igmp group-limit.......................................................................................................5-4

5.1.5 igmp group-policy....................................................................................................5-5

5.1.6 igmp group-policy vlan............................................................................................5-6

5.1.7 igmp host-join port...................................................................................................5-7

5.1.8 igmp host-join vlan ..................................................................................................5-8

5.1.9 igmp lastmember-queryinterval...............................................................................5-9

5.1.10 igmp max-response-time.....................................................................................5-10

5.1.11 igmp proxy...........................................................................................................5-11

5.1.12 igmp robust-count ...............................................................................................5-12

5.1.13 igmp timer other-querier-present.........................................................................5-13

5.1.14 igmp timer query..................................................................................................5-14

5.1.15 igmp version........................................................................................................5-15

5.1.16 reset igmp group .................................................................................................5-16

Chapter 6 PIM Configuration Commands...................................................................................6-1

6.1 PIM Configuration Commands...........................................................................................6-1

6.1.1 bsr-policy.................................................................................................................6-1

6.1.2 c-bsr ........................................................................................................................6-2

6.1.3 c-rp..........................................................................................................................6-3

6.1.4 crp-policy.................................................................................................................6-4

6.1.5 display pim bsr-info .................................................................................................6-5

6.1.6 display pim interface ...............................................................................................6-6

6.1.7 display pim neighbor ...............................................................................................6-7

6.1.8 display pim routing-table.........................................................................................6-8

6.1.9 display pim rp-info...................................................................................................6-9

6.1.10 pim.......................................................................................................................6-11

6.1.11 pim bsr-boundary ................................................................................................6-11

6.1.12 pim dm.................................................................................................................6-12

6.1.13 pim neighbor-limit................................................................................................6-13

6.1.14 pim neighbor-policy.............................................................................................6-14

6.1.15 pim sm.................................................................................................................6-14

6.1.16 pim timer hello.....................................................................................................6-15

6.1.17 register-policy......................................................................................................6-16

6.1.18 reset pim neighbor ..............................................................................................6-17

6.1.19 reset pim routing-table ........................................................................................6-17

6.1.20 spt-switch-threshold ............................................................................................6-19

6.1.21 source-policy.......................................................................................................6-20

6.1.22 static-rp................................................................................................................6-21

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Chapter 7 MSDP Configuration Commands............................................................................... 7-1

7.1 MSDP Configuration Commands.......................................................................................7-1

7.1.1 cache-sa-enable......................................................................................................7-1

7.1.2 display msdp brief ...................................................................................................7-1

7.1.3 display msdp peer-status........................................................................................7-2

7.1.4 display msdp sa-cache............................................................................................7-3

7.1.5 display msdp sa-count ............................................................................................7-5

7.1.6 import-source ..........................................................................................................7-6

7.1.7 msdp........................................................................................................................7-6

7.1.8 msdp-tracert............................................................................................................7-7

7.1.9 mtracert...................................................................................................................7-9

7.1.10 originating-rp .......................................................................................................7-10

7.1.11 peer description...................................................................................................7-11

7.1.12 peer mesh-group.................................................................................................7-11

7.1.13 peer minimum-ttl..................................................................................................7-12

7.1.14 peer request-sa-enable.......................................................................................7-13

7.1.15 peer sa-cache-maximum.....................................................................................7-13

7.1.16 peer connect-interface ........................................................................................7-14

7.1.17 peer sa-policy......................................................................................................7-15

7.1.18 peer sa-request-policy.........................................................................................7-16

7.1.19 reset msdp peer ..................................................................................................7-17

7.1.20 reset msdp sa-cache...........................................................................................7-17

7.1.21 reset msdp statistics............................................................................................7-18

7.1.22 shutdown.............................................................................................................7-18

7.1.23 static-rpf-peer......................................................................................................7-19

7.1.24 timer retry............................................................................................................7-20

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Chapter 1 IGMP Snooping Configuration

Commands

 Note:

z AmongS3600 series Ethernet switches,S3600-EI series support all the multicast

protocols listed in this manual, whileS3600-SI series only support IGMP Snooping

z An Ethernet switch serves as a router when an IP multicast protocol is running on it.

The routers mentioned here refer to common routers and Layer 3 Ethernet switches

running an IP multicast protocol.

1.1 IGMP Snooping Configuration Commands

1.1.1 display igmp-snooping configuration

Syntax

display igmp-snooping configuration

View

Any view

Parameter

None

Description

Use the display igmp-snooping configuration command to display IGMP Snooping

configuration information.

When IGMP Snooping is enabled on the switch, this command displays the following

information: IGMP Snooping status, aging time of the router port, query response

timeout time, and aging time of multicast member ports.

Related command: igmp-snooping.

Example

# Display IGMP Snooping configuration information on the switch.

<H3C> display igmp-snooping configuration

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Enable IGMP-Snooping.

The router port timeout is 105 second(s).

The max response timeout is 10 second(s).

The host port timeout is 260 second(s).

The above-mentioned information shows: IGMP Snooping is enabled, the aging time of

the router port is 105 seconds, the query response timeout time is 10 seconds, and the

aging time of multicast member ports is 260 seconds.

1.1.2 display igmp-snooping group

Syntax

display igmp-snooping group [ vlan vlan-id ]

View

Any view

Parameter

vlan-id: VLAN under which the multicast group information is to be displayed. If you do

not provide this argument, this command displays the multicast group information of all

VLANs.

Description

Use the display igmp-snooping group command to display information about the IP

and MAC multicast groups under the specified VLAN (with vlan vlan-id) or all VLANs

(without vlan vlan-id).

This command displays the following information: VLAN ID, router port, IP multicast

group address, member ports included in the IP multicast group, MAC multicast group,

MAC multicast group address, and member ports included in the MAC multicast group.

Example

# Display the information about the multicast groups under all the VLANs.

<H3C> display igmp-snooping group

Total 1 IP Group(s).

Total 1 MAC Group(s).

Vlan(id):99.

Total 1 IP Group(s).

Total 1 MAC Group(s).

Static Router port(s):

Ethernet1/0/11

Dynamic Router port(s):

Ethernet1/0/22

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IP group(s):the following ip group(s) match to one mac group.

IP group address:228.0.0.0

Static host port(s):

Ethernet1/0/23

Dynamic host port(s):

Ethernet1/0/10

MAC group(s):

MAC group address:0100-5e00-0000

Host port(s):Ethernet1/0/10 Ethernet1/0/23

Table 1-1 Description on the fields of the display igmp-snooping group command

Field Description

Total 1 IP Group(s).

Total 1 MAC Group(s).

Total number of IP multicast groups and

MAC multicast groups

Vlan(id):

ID of the VLAN whose multicast group

information is displayed

Static Router port(s): Static router port

Dynamic Router port(s): Dynamic router port

IP group address: IP address of a multicast group

MAC group(s): MAC multicast group

MAC group address: Address of a MAC multicast group

Host port(s) Member ports

1.1.3 display igmp-snooping statistics

Syntax

display igmp-snooping statistics

View

Any view

Parameter

None

Description

Use the display igmp-snooping statistics command to display IGMP Snooping

statistics.

This command displays the following information: the numbers of the IGMP general

query packets, IGMP group-specific query packets, IGMPv1 report packets, IGMPv2

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report packets, IGMP leave packets and error IGMP packets received, and the number

of the IGMP group-specific query packets sent.

Related command: igmp-snooping.

Example

# Display IGMP Snooping statistics.

<H3C> display igmp-snooping statistics

Received IGMP general query packet(s) number:0.

Received IGMP specific query packet(s) number:0.

Received IGMP V1 report packet(s) number:0.

Received IGMP V2 report packet(s) number:0.

Received IGMP leave packet(s) number:0.

Received error IGMP packet(s) number:0.

Sent IGMP specific query packet(s) number:0.

The information above shows that IGMP receives:

z zero IGMP general query packets

z zero IGMP specific query packets

z zero IGMPv1 report packets

z zero IGMPv2 report packets

z zero IGMP leave packets

z zero IGMP error packets

IGMP Snooping sends:

z zero IGMP specific query packets

1.1.4 igmp-snooping

Syntax

igmp-snooping { enable | disable }

View

System view

Parameter

enable: Enables the IGMP Snooping feature.

disable: Disables the IGMP Snooping feature.

Description

Use the igmp-snooping enable command to enable the IGMP Snooping feature.

Use the igmp-snooping disable command to disable the IGMP Snooping feature.

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By default, the IGMP Snooping feature is disabled.

Caution:

z To configure IGMP Snooping in VLAN view, you should first enable IGMP Snooping

globally in system view, and then enable IGMP Snooping in VLAN view. Otherwise,

the IGMP Snooping function does not take effect.

z If you enable both IGMP Snooping and VLAN VPN in a VLAN, IGMP query

messages may fail to pass the VLAN.

Example

# Enable the IGMP Snooping feature on the switch.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping enable

Enable IGMP-Snooping ok.

1.1.5 igmp-snooping fast-leave

Syntax

igmp-snooping fast-leave [ vlan vlan-list ]

undo igmp-snooping fast-leave [ vlan vlan-list ]

View

System view, Ethernet port view

Parameter

vlan-list: List of VLANs. You can specify multiple VLANs by providing this argument in

the form of vlan-list = { vlan-id [ to vlan-id ] } & < 1-10 >, where vlan-id is the ID of the

VLAN, in the range of 1 to 4,094 and & < 1-10 > means that you can provide up to 10

VLANs/VLAN ranges for this argument.

Description

Use the igmp-snooping fast-leave command to enable IGMP fast leave processing.

Use the undo igmp-snooping fast-leave command to cancel the configuration.

By default, IGMP fast leave processing is disabled.

Normally, upon receipt of an IGMP Leave message, Switch does not immediately

remove the port from the multicast group, but sends a group-specific query message. If

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no response is received in a given period, it then removes the port from the multicast

group.

After this command is executed, upon receipt of an IGMP Leave packet, Switch

removes the port from the multicast group directly. When the port is connected to only

one user, enabling IGMP fast leave processing can save bandwidth.

 Note:

z This feature is effective for IGMPv2-enabled clients only.

z When this feature is enabled, if one of the multiple users on a port leaves, the

multicast services for the other users in the same multicast group may be

interrupted.

Example

# Enable IGMP fast leave processing on Ethernet1/0/1.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping fast-leave

1.1.6 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

Parameter

current-interface: Specifies the current interface whose IP address is selected by the

Layer 2 multicast switch.

ip-address: Source IP address of the general query packet that the Layer 2 multicast

switch sends.

Description

Use the igmp-snooping general-query source-ip current-interface command to

configure the Layer 2 multicast switch to use the IP address of the current VLAN

interface as the source IP address of the general query packets that the Layer 2

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multicast switch sends. If no IP address is configured on the current VLAN interface,

the default IP address 0.0.0.0. is used as the default source IP address.

Use the igmp-snooping general-query source-ip ip-address command to configure

the Layer 2 multicast switch to use the specified IP address as the source IP address

when sending general query packets.

Use the undo igmp-snooping general-query source-ip command to configure the

Layer 2 multicast switch to use the default IP address as the source address when

sending general query packets.

These commands are effective after the IGMP Snooping querier is enabled on the

switch; otherwise, the switch cannot send general query packets.

By default, the Layer 2 multicast switch sends general query packets with the source IP

address 0.0.0.0.

Example

# Configure the Layer 2 multicast switch to send general query packets with the source

IP address 2.2.2.2 in VLAN 3.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

[H3C-vlan3] igmp-snooping general-query source-ip 2.2.2.2

1.1.7 igmp-snooping group-limit

Syntax

igmp-snooping group-limit limit [ vlan vlan-list ] [ overflow-replace ]

undo igmp-snooping group-limit [ vlan vlan-list ]

View

Ethernet port view

Parameter

limit: Maximum number of multicast groups the port can join, in the range of 1 to 256.

overflow-replace: Allows a new multicast group to replace an existing multicast group

and the multicast group with the lowest IP address is replaced first.

vlan-list: List of VLANs. You can specify multiple VLANs by providing this argument in

the form of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where &<1-10> means that you

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can provide up to 10 VLANs/VLAN ranges for this argument. VLAN ID ranges from 1 to

4094.

Description

Use the igmp-snooping group-limit command to define the maximum number of

multicast groups the port can join.

Use the undo igmp-snooping group-limit command to restore the default setting.

By default, there is no limit on the number of multicast groups the port can join.

Example

# Allow Ethernet1/0/1 to join at most 200 multicast groups.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping group-limit 200

1.1.8 igmp-snooping group-policy

Syntax

igmp-snooping group-policy acl-number [ vlan vlan-list ]

undo igmp-snooping group-policy [ vlan vlan-list ]

View

System view, Ethernet port view

Parameter

acl-number: Basic ACL number, in the range of 2000 to 2999.

vlan-id: vlan-list: List of VLANs. You can specify multiple VLANs by providing this

argument in the form of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where &<1-10>

means that you can provide up to 10 VLANs/VLAN ranges for this argument. VLAN ID

ranges from 1 to 4094.

Description

Use the igmp-snooping group-policy command to configure an IGMP Snooping

filtering ACL.

Use the undo igmp-snooping group-policy command to remove the IGMP Snooping

filtering ACL.

By default, no IGMP Snooping filtering ACL is configured.

You can configure multicast filtering ACLs globally or on the switch ports connected to

user ends so as to use the IGMP Snooping filter function to limit the multicast streams

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that the users can access. With this function, you can treat different VoD users in

different ways by allowing them to access the multicast streams in different multicast

groups.

In practice, when a user orders a multicast program, an IGMP host report message is

generated. When the message arrives at the switch, the switch examines the multicast

filtering ACL configured on the access port to determine if the port can join the

corresponding multicast group or not. If yes, it adds the port to the forward port list of

the multicast group; if not, it drops the IGMP host report message and does not forward

the corresponding data stream to the port. In this way, you can control the multicast

streams that users can access.

An ACL rule defines a multicast address or a multicast address range (for example

224.0.0.1 to 239.255.255.255) and is used to:

z Allow the port(s) to join only the multicast group(s) defined in the rule by a permit

statement.

z Inhibit the port(s) from joining the multicast group(s) defined in the rule by a deny

statement.

 Note:

z One port can belong to multiple VLANs. But for each VLAN on the port, you can

configure only one ACL.

z If no ACL rule is configured or the port does not belong to the specified VLAN, the

filter ACL you configured does not take effect on the port.

z Since most devices broadcast unknown multicast packets, this function is often

used together with the unknown multicast packet drop function to prevent multicast

streams from being broadcast to a filtered port as unknown multicast packets.

Example

# Configure ACL 2000 to allow users under Ethernet1/0/1 to access the multicast

streams in groups 225.0.0.0 to 225.255.255.255.

z Configure ACL 2000.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] acl number 2000

[H3C-acl-basic-2000] rule permit source 225.0.0.0 0.255.255.255

[H3C-acl-basic-2000] quit

z Create VLAN 2 and add Ethernet1/0/1 to VLAN 2.

[H3C] vlan 2

[H3C-vlan2] port Ethernet 1/0/1

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[H3C-vlan2] quit

z Configure ACL 2000 on Ethernet1/0/1 to allow this VLAN 2 port to join only the

IGMP multicast groups defined in the rule of ACL 2000.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping group-policy 2000 vlan 2

[H3C-Ethernet1/0/1] quit

# Configure ACL 2001 to allow users under Ethernet1/0/2 to access the multicast

streams in any groups except groups 225.0.0.0 to 225.0.0.255.

z Configure ACL 2001.

[H3C] acl number 2001

[H3C-acl-basic-2001] rule deny source 225.0.0.0 0.0.0.255

[H3C-acl-basic-2001] rule permit source any

[H3C-acl-basic-2001] quit

z Create VLAN 2 and add Ethernet1/0/2 to VLAN 2.

[H3C] vlan 2

[H3C-vlan2] port Ethernet 1/0/2

[H3C-vlan2] quit

z Configure ACL 2001 on Ethernet1/0/2 to allow this VLAN 2 port to join any IGMP

multicast groups except those defined in the deny rule of ACL 2001.

[H3C] interface Ethernet 1/0/2

[H3C-Ethernet1/0/2] igmp-snooping group-policy 2001 vlan 2

1.1.9 igmp-snooping host-aging-time

Syntax

igmp-snooping host-aging-time seconds

undo igmp-snooping host-aging-time

View

System view

Parameter

seconds: Aging time (in seconds) of multicast member ports, in the range of 200 to

1,000.

Description

Use the igmp-snooping host-aging-time command to configure the aging time of

multicast member port.

Use the undo igmp-snooping host-aging-time command to restore the default aging

time.

By default, the aging time of multicast member ports is 260 seconds.

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The aging time of multicast member ports determines the refresh frequency of multicast

group members. In an environment where multicast group members change frequently,

a relatively shorter aging time is required.

Related command: igmp-snooping.

Example

# Set the aging time of multicast member ports to 300 seconds.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping host-aging-time 300

1.1.10 igmp-snooping max-response-time

Syntax

igmp-snooping max-response-time seconds

undo igmp-snooping max-response-time

View

System view

Parameter

seconds: Query response timeout time in seconds, in the range of 1 to 25.

Description

Use the igmp-snooping max-response-time command to configure the query

response timeout time.

Use the undo igmp-snooping max-response-time command to restore the default

timeout time.

By default, the query response timeout time is 10 seconds.

Related command: igmp-snooping, igmp-snooping router-aging-time.

Example

# Set the query response timeout time to 15 seconds.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping max-response-time 15

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1.1.11 igmp-snooping querier

Syntax

igmp-snooping querier

undo igmp-snooping querier

View

VLAN view

Parameter

None

Description

Use the igmp-snooping querier command to enable the IGMP Snooping querier

feature on the current VLAN of the Layer 2 multicast switch.

Use the undo igmp-snooping querier command to disable the IGMP Snooping

querier feature on the current VLAN of the Layer 2 multicast switch.

By default, the IGMP Snooping querier feature of the Layer 2 multicast switch is

disabled.

Example

# Enable the IGMP Snooping feature on VLAN 3 of the Layer 2 multicast switch.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

1.1.12 igmp-snooping query-interval

Syntax

igmp-snooping query-interval seconds

undo igmp-snooping query-interval

View

VLAN view

Parameter

seconds: Interval for the Layer 2 multicast switch to send general query packets.

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Description

Use the igmp-snooping query-interval command to configure the interval for the

Layer 2 multicast switch to send general query packets.

Use the undo igmp-snooping query-interval command to restore the interval to the

default value.

These commands are effective after the IGMP Snooping querier feature is enabled.

Otherwise, the switch will not send general query packets. The configured query

interval must be longer than the maximum response interval of the host,

By default, the Layer 2 multicast switch sends general query packets at the interval of

60 seconds.

Example

# Configure the Layer 2 multicast switch to send general query packets at the interval of

100 seconds on VLAN 3.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

[H3C-vlan3] igmp-snooping query-interval 100

1.1.13 igmp-snooping router-aging-time

Syntax

igmp-snooping router-aging-time seconds

undo igmp-snooping router-aging-time

View

System view

Parameter

seconds: Aging time (in seconds) of the router port, in the range of 1 to 1,000.

Description

Use the igmp-snooping router-aging-time command to configure the aging time of

the IGMP Snooping router port.

Use the undo igmp-snooping router-aging-time command to restore the default

aging time.

By default, the aging time of the router port is 105 seconds.

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Chapter 1 IGMP Snooping Configuration

Commands

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The router port here refers to the port connecting the Layer 2 switch to the router. The

Layer 2 switch receives IGMP general query messages from the router through this

port. The aging time of the router port should be a value about 2.5 times of the general

query interval.

Related command: igmp-snooping max-response-time, igmp-snooping.

Example

# Set the aging time of the router port to 500 seconds.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping router-aging-time 500

1.1.14 reset igmp-snooping statistics

Syntax

reset igmp-snooping statistics

View

User view

Parameter

None

Description

Use the reset igmp-snooping statistics command to clear IGMP Snooping statistics.

Related command: igmp-snooping.

Example

# Clear IGMP Snooping statistics.

<H3C> reset igmp-snooping statistics

1.1.15 service-type multicast

Syntax

service-type multicast

undo service-type multicast

View

VLAN view

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Commands

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Parameter

None

Description

Use the service-type multicast command to set the current VLAN as a multicast

VLAN.

Use the undo service-type multicast command to cancel the multicast VLAN setting.

By default, no VLAN is a multicast VLAN.

By configuring a multicast VLAN, adding the corresponding switch ports to the multicast

VLAN, and enabling IGMP Snooping, you can allow users in different VLANs to share

the same multicast VLAN. This saves bandwidth since multicast stream is transmitted

only within the multicast VLAN, and also guarantees the security because the multicast

VLAN is completely isolated from the user VLANs.

 Note:

z Isolate VLANs cannot be set as multicast VLANs.

z One port belongs to one multicast VLAN only.

z The type of ports connected to the user terminal must be hybrid.

z The multicast member port must be in the same multicast VLAN with the router port.

Otherwise, the port cannot receive multicast packets.

z If a router port is added to a multicast VLAN, the router port must be configured as a

trunk port or tagged hybrid port. Otherwise, all the multicast member ports in this

multicast VLAN cannot receive multicast packets.

z If a multicast member port needs to receive packets forwarded by the router port

that does not belong to any multicast VLAN, the multicast member port must be

removed from the multicast VLAN. Otherwise, the port cannot receive multicast

packets.

Example

# Configure VLAN 2 as a multicast VLAN.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] vlan 2

[H3C-vlan2] service-type multicast

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Commands

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Chapter 2 Common IP Multicast Configuration

Commands

2.1 Common IP Multicast Configuration Commands

2.1.1 display mpm forwarding-table

Syntax

display mpm forwarding-table [ group-address ]

View

Any view

Parameter

group-address: IP address of a multicast group, in the range 224.0.0.0 to

239.255.255.255.

Description

Use the display mpm forwarding-table command to display the information about a

multicast forward table/all the multicast forward tables containing port information.

With the group-address argument provided, this command only displays the matched (*,

G) entries. Otherwise, this command displays all the entries.

To display the information about a multicast forward table that does not contain port

information, use the display multicast forwarding-table command.

Example

# Display the information about all the multicast forward tables containing port

information.

<H3C> display mpm forwarding-table

Total 1 entry(entries)

00001. (120.0.0.2, 225.0.0.2)

iif Vlan-interface1200

1 oif(s):

Vlan-interface32

Ethernet1/0/19

Total 1 entry(entries) Listed

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Table 2-1 Description on the fields of the display mpm forwarding-table command

Field Description

Total 1 entry(entries) Total number of the entries

00001 Entry number

(120.0.0.2, 225.0.0.2) Source address-group address pair

iif Vlan-interface1200 The inbound VLAN is VLAN 1200.

1 oif(s): 2 out-vlan(s): Two outbound VLANs exist.

Vlan-interface32

Ethernet1/0/19

The first outbound VLAN is VLAN 32, with

Ethernet1/0/19 as the outbound port

Total 1 entry(entries) Listed

The multicast forward table contains one

(S,G) entry.

2.1.2 display mpm group

Syntax

display mpm group [ vlan vlan-id ]

View

Any view

Parameter

vlan vlan-id: Specifies a VLAN ID. If you do not specify this keyword-argument

combination, all the VLANs are specified.

Description

Use the display mpm group command to display the information about the IP

multicast groups and MAC multicast groups in a VLAN/all the VLANs configured on a

switch.

The output information includes:

z VLAN ID

z Router interface

z IP multicast group address

z Member port of an IP multicast group

z MAC multicast group

z MAC multicast group address

z Member port of a MAC multicast group

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H3C S3600 Series Command Manual

H3C S3600 Series Command Manual

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