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HPE FlexNetwork 5130 EI Series Configuration Guide

HPE FlexNetwork 5130 EI Series
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43
Configuring multicast VLANs
Overview
As shown in Figure 17, Host A, Host B, and Host C are in different VLANs and the same multicast
group. When Switch A (Layer 3 device) receives multicast data for that group, it sends three copies
of the multicast data to Switch B (Layer 2 device). This occupies a large amount of bandwidth and
increases the burden on the Layer 3 device.
Figure 17 Multicast transmission without the multicast VLAN feature
After a multicast VLAN is configured on Switch B, Switch A sends only one copy of the multicast data
to the multicast VLAN on Switch B. This method saves network bandwidth and lessens the burden
on the Layer 3 device.
Multicast VLANs include sub-VLAN-based multicast VLANs and port-based multicast VLANs.
Sub-VLAN-based multicast VLAN
As shown in Figure 18:
Host A, Host B, and Host C are in VLAN 2 through VLAN 4, respectively.
On Switch B, VLAN 10 is a multicast VLAN. VLAN 2 through VLAN 4 are sub-VLANs of VLAN
10.
IGMP snooping is enabled for the multicast VLAN and its sub-VLANs.
Source
Receiver
Host A
Multicast packets
VLAN 2
VLAN 3
VLAN 4
VLAN 2
VLAN 3
VLAN 4
Switch B
Receiver
Host B
Receiver
Host C
Switch A
IGMP querier

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HPE FlexNetwork 5130 EI Series Specifications

General IconGeneral
BrandHPE
ModelFlexNetwork 5130 EI Series
CategorySwitch
LanguageEnglish

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