Chapter 1 Multicast
Configuration Guide
1.1 IGMP Snooping Configuration Examples
I. Network diagram
Figure 1-1 Network diagram for simulated
joining configuration
II. Networking and configuration
requirements
l
As shown in Figure 1-1, Router A connects to the
multicast source through GigabitEthernet 1/0/2 and to Switch A through GigabitEthernet
1/0/1.
l
IGMPv2 is required on Router A, IGMP Snooping version
2 is required on Switch A, and Router A will act as the IGMP querier on the
subnet.
l
It is required that multicast data for group
224.1.1.1 can be forwarded through GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4
of Switch A even if Host A and Host B accidentally, temporarily stop receiving
multicast data.
III. Applicable product matrix
|
Product
|
Software version
|
Hardware version
|
|
S3610 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5510 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5500-SI Series
Ethernet Switches
|
Release 1207
|
All
versions
(except S5500-20TP-SI)
|
|
Release
1301
|
S5500-20TP-SI
|
|
S5500-EI Series Ethernet Switches
|
Release 2103
|
All versions
|
|
S7500E Series Ethernet Switches
|
Release 6100
|
All versions
|
IV. Configuration procedure
1)
Configure IP addresses
Configure an IP address and subnet mask for
each interface as per Figure
1-1. The detailed configuration steps are omitted.
2)
Configure Router A
# Enable IP multicast routing, enable
PIM-DM on each interface, and enable IGMPv2 on GigabitEthernet 1/0/1.
<RouterA>
system-view
[RouterA] multicast
routing-enable
[RouterA] interface
GigabitEthernet 1/0/1
[RouterA-GigabitEthernet1/0/1]
igmp enable
[RouterA-GigabitEthernet1/0/1]
pim dm
[RouterA-GigabitEthernet1/0/1]
quit
[RouterA] interface
GigabitEthernet 1/0/2
[RouterA-GigabitEthernet1/0/2]
pim dm
[RouterA-GigabitEthernet1/0/2]
quit
3)
Configure Switch A
# Enable IGMP Snooping globally.
<SwitchA>
system-view
[SwitchA]
igmp-snooping
[SwitchA-igmp-snooping]
quit
# Create VLAN 100, assign GigabitEthernet
1/0/1 through GigabitEthernet 1/0/4 to this VLAN, and enable IGMP Snooping in it.
[SwitchA] vlan
100
[SwitchA-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/4
[SwitchA-vlan100]
igmp-snooping enable
[SwitchA-vlan100]
quit
# Enable simulated host joining on
GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4 respectively.
[SwitchA]
interface GigabitEthernet 1/0/3
[SwitchA-GigabitEthernet1/0/3]
igmp-snooping host-join 224.1.1.1 vlan 100
[SwitchA-GigabitEthernet1/0/3]
quit
[SwitchA]
interface GigabitEthernet 1/0/4
[SwitchA-GigabitEthernet1/0/4]
igmp-snooping host-join 224.1.1.1 vlan 100
[SwitchA-GigabitEthernet1/0/4]
quit
4)
Verify the configuration
# View the detailed information about IGMP
Snooping multicast groups in VLAN 100 on Switch A.
[SwitchA] display
igmp-snooping group vlan 100 verbose
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Port
flags: D-Dynamic port, S-Static port, A-Aggregation port, C-Copy port
Subvlan
flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
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.
IP
group address:224.1.1.1
(0.0.0.0,
224.1.1.1):
Attribute: Host Port
Host port(s):total 2 port.
GE1/0/3 (D) ( 00:03:23 )
GE1/0/4 (D) ( 00:03:23 )
MAC
group(s):
MAC
group address:0100-5e01-0101
Host port(s):total 2 port.
GE1/0/3
GE1/0/4
As shown above, GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/4 of Switch A have joined multicast group 224.1.1.1.
V. Complete configuration
1)
Configuration on Switch A
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
#
interface GigabitEthernet1/0/1
port
access vlan 100
#
interface GigabitEthernet1/0/2
port
access vlan 100
#
interface GigabitEthernet1/0/3
port
access vlan 100
igmp-snooping
host-join 224.1.1.1 vlan 1
#
interface GigabitEthernet1/0/4
port
access vlan 100
igmp-snooping
host-join 224.1.1.1 vlan 1
#
VI. Configuration guidelines
l
Layer 2 and Layer 3 multicast protocols can run simultaneously
on a switch, but a Layer 2 multicast protocol cannot run in a VLAN while a
Layer 3 multicast protocol is running on the virtual interface of that VLAN,
and vice versa.
l
IGMP Snooping must be enabled globally in system
view before it can be enabled in a VLAN.
I. Network diagram
Figure 1-2 Network diagram for static router port
configuration
II. Networking and configuration
requirements
l
If receivers are steady on receiving the
multicast data addressed to a particular group, you can configure a static port
to enhance the reliability of multicast data transmission.
l
As shown in Figure 1-2, Router A connects to a
multicast source (Source) through GigabitEthernet 1/0/2, and to Switch A
through GigabitEthernet 1/0/1.
l
IGMP is to run between Router A and Switch A,
and IGMP Snooping is to run on Switch A, Switch B and Switch C, with Router A
acting as the IGMP querier.
l
Suppose STP runs on the network. To avoid data
loops, the forwarding path from Switch A to Switch C is blocked under normal conditions,
and multicast traffic flows to the receivers, Host A and Host C, attached to
Switch C only along the path of Switch A—Switch B—Switch C.
l
Now it is required to configure GigabitEthernet
1/0/3 that connects Switch A to Switch C as a static router port, so that
multicast traffic can flow to the receivers nearly uninterruptedly along the
path of Switch A—Switch C in the case that the path of Switch
A—Switch B—Switch C gets blocked.
l
It is required to configure GigabitEthernet 1/0/3
and GigabitEthernet 1/0/5 on Switch C as static member ports for multicast
group 225.1.1.1, so that the attached two receivers can steadily receive
multicast data destined for that multicast group.
If no static router
port is configured, when the path of Switch A—Switch B—Switch C
gets blocked, at least one IGMP query-response cycle must be completed before
the multicast data can flow to the receivers along the new path of Switch
A—Switch C, namely multicast delivery will be interrupted during this
process.
III. Applicable product matrix
|
Product
|
Software version
|
Hardware version
|
|
S3610 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5510 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5500-SI Series Ethernet Switches
|
Release 1207
|
All versions
(except S5500-20TP-SI)
|
|
Release 1301
|
S5500-20TP-SI
|
|
S5500-EI Series Ethernet Switches
|
Release 2103
|
All versions
|
|
S7500E Series Ethernet Switches
|
Release 6100
|
All versions
|
IV. Configuration procedure
1)
Configure IP addresses
Configure an IP address and subnet mask for
each interface as per Figure
1-2. The detailed configuration steps are omitted.
2)
Configure Router A
# Enable IP multicast routing, enable
PIM-DM on each interface, and enable IGMP on GigabitEthernet 1/0/1.
<RouterA>
system-view
[RouterA] multicast
routing-enable
[RouterA] interface
GigabitEthernet 1/0/1
[RouterA-GigabitEthernet1/0/1]
igmp enable
[RouterA-GigabitEthernet1/0/1]
pim dm
[RouterA-GigabitEthernet1/0/1]
quit
[RouterA] interface
GigabitEthernet 1/0/2
[RouterA-GigabitEthernet1/0/2]
pim dm
[RouterA-GigabitEthernet1/0/2]
quit
3)
Configure Switch A
# Enable IGMP Snooping globally.
<SwitchA>
system-view
[SwitchA]
igmp-snooping
[SwitchA-igmp-snooping]
quit
# Create VLAN 100, assign GigabitEthernet
1/0/1 through GigabitEthernet 1/0/3 to this VLAN, and enable IGMP Snooping in
it.
[SwitchA] vlan
100
[SwitchA-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/3
[SwitchA-vlan100]
igmp-snooping enable
[SwitchA-vlan100]
quit
# Configure GigabitEthernet 1/0/3 to be a static
router port.
[SwitchA]
interface GigabitEthernet 1/0/3
[SwitchA-GigabitEthernet1/0/3]
igmp-snooping static-router-port vlan 100
[SwitchA-GigabitEthernet1/0/3]
quit
4)
Configure Switch B
# Enable IGMP Snooping globally.
<SwitchB>
system-view
[SwitchB]
igmp-snooping
[SwitchB-igmp-snooping]
quit
# Create VLAN 100, assign GigabitEthernet
1/0/1 and GigabitEthernet 1/0/2 to this VLAN, and enable IGMP Snooping in it.
[SwitchB] vlan
100
[SwitchB-vlan100]
port GigabitEthernet 1/0/1 GigabitEthernet 1/0/2
[SwitchB-vlan100]
igmp-snooping enable
[SwitchB-vlan100]
quit
5)
Configure Switch C
# Enable IGMP Snooping globally.
<SwitchC>
system-view
[SwitchC]
igmp-snooping
[SwitchC-igmp-snooping]
quit
# # Create VLAN 100, assign GigabitEthernet
1/0/1 through GigabitEthernet 1/0/5 to this VLAN, and enable IGMP Snooping in it.
[SwitchC] vlan
100
[SwitchC-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/5
[SwitchC-vlan100]
igmp-snooping enable
[SwitchC-vlan100]
quit
# Configure GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/5 in VLAN 100 as static member ports for multicast group 225.1.1.1.
[SwitchC]
interface GigabitEthernet 1/0/3
[SwitchC-GigabitEthernet1/0/3]
igmp-snooping static-group 225.1.1.1 vlan 100
[SwitchC-GigabitEthernet1/0/3]
quit
[SwitchC]
interface GigabitEthernet 1/0/5
[SwitchC-GigabitEthernet1/0/5]
igmp-snooping static-group 225.1.1.1 vlan 100
[SwitchC-GigabitEthernet1/0/5]
quit
6)
Verify the configuration
# View the detailed information about IGMP
Snooping multicast groups in VLAN 100 on Switch A.
[SwitchA] display
igmp-snooping group vlan 100 verbose
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Port
flags: D-Dynamic port, S-Static port, A-Aggregation port, C-Copy port
Subvlan
flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Router
port(s):total 2 port.
GE1/0/1 (D) ( 00:01:30 )
GE1/0/3 (S)
IP
group(s):the following ip group(s) match to one mac group.
IP
group address:225.1.1.1
(0.0.0.0,
225.1.1.1):
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
As shown above, GigabitEthernet 1/0/3 of
Switch A has become a static router port.
# View the detailed information about IGMP
Snooping multicast groups in VLAN 100 on Switch C.
[SwitchC] display
igmp-snooping group vlan 100 verbose
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Port
flags: D-Dynamic port, S-Static port, A-Aggregation port, C-Copy port
Subvlan
flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Router
port(s):total 1 port.
GE1/0/2 (D) ( 00:01:30 )
IP
group(s):the following ip group(s) match to one mac group.
IP
group address:225.1.1.1
(0.0.0.0,
225.1.1.1):
Host port(s):total 1 port.
GE1/0/3 (S)
GE1/0/5 (S)
MAC
group(s):
MAC
group address:0100-5e01-0101
Host port(s):total 1 port.
GE1/0/3
GE1/0/5
As shown above, GigabitEthernet 1/0/3 and
GigabitEthernet 1/0/5 of Switch C have become static member ports for 225.1.1.1.
V. Complete configuration
1)
Configuration on Switch A
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
#
interface
GigabitEthernet1/0/1
port
access vlan 100
#
interface
GigabitEthernet1/0/2
port
access vlan 100
#
interface
GigabitEthernet1/0/3
port
access vlan 100
igmp-snooping
static-router-port vlan 100
#
2)
Configuration on Switch B
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
#
interface
GigabitEthernet1/0/1
port
access vlan 100
#
interface
GigabitEthernet1/0/2
port
access vlan 100
#
3)
Configuration on Switch C
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
#
interface
GigabitEthernet1/0/1
port
access vlan 100
#
interface
GigabitEthernet1/0/2
port
access vlan 100
#
interface
GigabitEthernet1/0/3
port
access vlan 100
igmp-snooping
static-group 225.1.1.1 vlan 100
#
interface
GigabitEthernet1/0/4
port
access vlan 100
#
interface
GigabitEthernet1/0/5
port access
vlan 100
igmp-snooping
static-group 225.1.1.1 vlan 100
#
VI. Configuration guidelines
None.
I. Network diagram
Figure 1-3 Network diagram for IGMP
Snooping querier configuration
II. Networking and configuration
requirements
l
As shown in Figure 1-3, in a Layer 2–only
network environment, two multicast sources Source 1 and Source 2 send multicast
data to multicast groups 224.1.1.1 and 225.1.1.1 respectively, Host A and Host
C are receivers of multicast group 224.1.1.1, while Host B and Host D are
receivers of multicast group 225.1.1.1.
l
All the receivers are running IGMPv2, and all
the switches need to run IGMP Snooping version 2. Switch A, which is close to
the multicast sources, is chosen as the IGMP Snooping querier.
l
To prevent flooding of unknown multicast traffic
within the VLAN, it is required to configure all the switches to drop unknown
multicast data packets.
l
Because a switch does not enlist a port that has
heard an IGMP query with a source IP address of 0.0.0.0 (default) as a dynamic router
port, it is required configure a non-all-zero IP address as the source IP
address of IGMP queries to ensure normal creation of Layer 2 multicast forwarding
entries.
III. Applicable product matrix
|
Product
|
Software version
|
Hardware version
|
|
S3610 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5510 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5500-SI
Series Ethernet Switches
|
Release
1207
|
All versions
(except
S5500-20TP-SI)
|
|
Release
1301
|
S5500-20TP-SI
|
|
S5500-EI
Series Ethernet Switches
|
Release
2103
|
All
versions
|
|
S7500E
Series Ethernet Switches
|
Release
6100
|
All
versions
|
IV. Configuration procedure
1)
Configure Switch A
# Enable IGMP Snooping globally.
<SwitchA>
system-view
[SwitchA]
igmp-snooping
[SwitchA-igmp-snooping]
quit
# Create VLAN 100 and assign GigabitEthernet
1/0/1 through GigabitEthernet 1/0/3 to the VLAN.
[SwitchA] vlan
100
[SwitchA-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/3
# Enable IGMP Snooping and the function of
dropping unknown multicast traffic in VLAN 100.
[SwitchA-vlan100]
igmp-snooping enable
[SwitchA-vlan100]
igmp-snooping drop-unknown
# Enable the IGMP Snooping querier function
in VLAN 100
[SwitchA-vlan100]
igmp-snooping querier
# Set the source IP address of IGMP general
queries and group-specific queries to 192.168.1.1 in VLAN 100.
[SwitchA-vlan100]
igmp-snooping general-query source-ip 192.168.1.1
[SwitchA-vlan100]
igmp-snooping special-query source-ip 192.168.1.1
2)
Configure Switch B
# Enable IGMP Snooping globally.
<SwitchB>
system-view
[SwitchB]
igmp-snooping
[SwitchB-igmp-snooping]
quit
# Create VLAN 100, and assign GigabitEthernet
1/0/1 through GigabitEthernet 1/0/4 to the VLAN.
[SwitchB] vlan
100
[SwitchB-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/4
# Enable IGMP Snooping and the function of
dropping unknown multicast traffic in VLAN 100.
[SwitchB-vlan100]
igmp-snooping enable
[SwitchB-vlan100]
igmp-snooping drop-unknown
[SwitchB-vlan100]
quit
Configurations on Switch C and Switch D are
similar to the configuration on Switch B.
3)
Verify the configuration
After the IGMP Snooping querier starts to
work, all the switches but the querier can receive IGMP general queries. By
using the display igmp-snooping statistics command, you can view the
statistics information about the IGMP messages received. For example:
# View the IGMP message statistics on
Switch B.
[SwitchB-vlan100]
display igmp-snooping statistics
Received
IGMP general queries:3.
Received
IGMPv1 reports:0.
Received
IGMPv2 reports:12.
Received
IGMP leaves:0.
Received
IGMPv2 specific queries:0.
Sent
IGMPv2 specific queries:0.
Received
IGMPv3 reports:0.
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:0.
V. Complete configuration
1)
Configuration on Switch A
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
igmp-snooping
drop-unknown
igmp-snooping
querier
igmp-snooping
general-query source-ip 192.168.1.1
igmp-snooping
special-query source-ip 192.168.1.1
#
interface
GigabitEthernet1/0/1
port
access vlan 100
#
interface
GigabitEthernet1/0/2
port
access vlan 100
#
interface
GigabitEthernet1/0/3
port
access vlan 100
#
2)
Configuration on Switch B
#
igmp-snooping
#
vlan 100
igmp-snooping
enable
igmp-snooping
drop-unknown
#
interface
GigabitEthernet1/0/1
port
access vlan 100
#
interface
GigabitEthernet1/0/2
port
access vlan 100
#
interface
GigabitEthernet1/0/3
port
access vlan 100
#
interface
GigabitEthernet1/0/4
port
access vlan 100
#
The configuration on Switch C and Switch D is
similar to the configuration on Switch B.
1.2 MLD Snooping Configuration Examples
I. Network diagram
Figure 1-4 Network diagram for simulated
joining configuration
II. Networking and configuration
requirements
l
As shown in Figure 1-4, Router A connects to the
IPv6 multicast source through GigabitEthernet 1/0/2 and to Switch A through
GigabitEthernet 1/0/1.
l
MLDv1 is required on Router A, MLD Snooping
version 1 is required on Switch A, and Router A will act as the MLD querier on
the subnet.
l
It is required that the receivers, Host A and
Host B, attached to Switch A can receive IPv6 multicast traffic; multicast
traffic can be forwarded through GigabitEthernet 1/0/3 and GigabitEthernet 1/0/4
of Switch A even if Host A and Host B accidentally, temporarily stop receiving
IPv6 multicast data.
III. Applicable product matrix
|
Product
|
Software version
|
Hardware version
|
|
S3610 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5510 Series Ethernet Switches
|
Release 5301
|
All versions
|
|
S5500-SI Series Ethernet Switches
|
Release 1207
|
All versions
(except S5500-20TP-SI)
|
|
Release 1301
|
S5500-20TP-SI
|
|
S5500-EI Series Ethernet Switches
|
Release 2103
|
All versions
|
IV. Configuration procedure
1)
Configure IPv6 addresses
Enable IPv6 forwarding and configure an
IPv6 address and prefix length for each interface as per Figure 1-4.
The detailed configuration steps are omitted.
2)
Configure Router A
# Enable IPv6 multicast routing, enable
IPv6 PIM-DM on each interface, and enable MLDv1 on GigabitEthernet 1/0/1.
<RouterA>
system-view
[RouterA] multicast
ipv6 routing-enable
[RouterA] interface
GigabitEthernet 1/0/1
[RouterA-GigabitEthernet1/0/1]
mld enable
[RouterA-GigabitEthernet1/0/1]
pim ipv6 dm
[RouterA-GigabitEthernet1/0/1]
quit
[RouterA] interface
GigabitEthernet 1/0/2
[RouterA-GigabitEthernet1/0/2]
pim ipv6 dm
[RouterA-GigabitEthernet1/0/2]
quit
3)
Configure Switch A
# Enable MLD Snooping globally.
<SwitchA>
system-view
[SwitchA]
mld-snooping
[SwitchA-mld-snooping]
quit
# Create VLAN 100, assign GigabitEthernet 1/0/1
through GigabitEthernet 1/0/4 to this VLAN, and enable MLD Snooping in it.
[SwitchA] vlan
100
[SwitchA-vlan100]
port GigabitEthernet 1/0/1 to GigabitEthernet 1/0/4
[SwitchA-vlan100]
mld-snooping enable
[SwitchA-vlan100]
quit
# Configure GigabitEthernet 1/0/3 and GigabitEthernet
1/0/4 as simulated hosts for IPv6 multicast group FF1E::101.
[SwitchA]
interface GigabitEthernet 1/0/3
[SwitchA-GigabitEthernet1/0/3]
mld-snooping host-join ff1e::101 vlan 100
[SwitchA-GigabitEthernet1/0/3]
quit
[SwitchA]
interface GigabitEthernet 1/0/4
[SwitchA-GigabitEthernet1/0/4]
mld-snooping host-join ff1e::101 vlan 100
[SwitchA-GigabitEthernet1/0/4]
quit
4)
Verify the configuration
# View the detailed information about MLD
Snooping multicast groups in VLAN 100 on Switch A.
[SwitchA] display
mld-snooping group vlan 100 verbose
Total
1 IP Group(s).
Total
1 IP Source(s).
Total
1 MAC Group(s).
Port
flags: D-Dynamic port, S-Static port, A-Aggregation port, C-Copy port
Subvlan
flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
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.
IP
group address:FF1E::101
(::, FF1E::101):
Attribute: Host Port
Host port(s):total 2 port.
GE1/0/3 (D) ( 00:03:23 )
GE1/0/4 (D) ( 00:03:23 )
MAC
group(s):
MAC
group address:3333-0000-1001
Host port(s):total 2 port.
GE1/0/3
