Configuring Igmp Snooping For Vlans - TP-Link T1500 Series User Manual

Configuring Layer 2 Multicast
IGMP Version
Unknown
Multicast Groups
Header Validation
2) Click Apply.

2.1.2 Configuring IGMP Snooping for VLANs

Before configuring IGMP Snooping for VLANs, set up the VLANs that the router ports and
the member ports are in. For details, please refer to
The switch supports configuring IGMP Snooping on a per-VLAN basis. After IGMP
Snooping is enabled globally, you also need to enable IGMP Snooping and configure the
corresponding parameters for the VLANs that the router ports and the member ports are
in.
Choose the menu L2 FEATURES > Multicast > IGMP Snooping > Global Config, and click
in your desired VLAN entry in the IGMP VLAN Config section to load the following page.
Specify the IGMP version.
v1: The switch works as an IGMPv1 Snooping switch. It can only process
IGMPv1 messages from the host. Messages of other versions are ignored.
v2: The switch works as an IGMPv2 Snooping switch. It can process both
IGMPv1 and IGMPv2 messages from the host. IGMPv3 messages are ignored.
v3: The switch works as an IGMPv3 Snooping switch. It can process IGMPv1,
IGMPv2 and IGMPv3 messages from the host.
Set the way in which the switch processes data that are sent to unknown
multicast groups as Forward or Discard. By default, it is Forward.
Unknown multicast groups are multicast groups that do not match any of the
groups announced in earlier IGMP membership reports, and thus cannot be
found in the multicast forwarding table of the switch.
IGMP Snooping and MLD Snooping share the setting of Unknown
Note:
Multicast Groups, so you have to enable MLD Snooping globally on the L2
FEATURES > Multicast > MLD Snooping > Global Config page at the same
time.
Enable or disable Header Validation. By default, it is disabled.
Generally, for IGMP packets, the TTL value should be 1, ToS field should be
0xC0, and Router Alert option should be 0x94040000. The fields to be validated
depend on the IGMP version being used. IGMPv1 only checks the TTL field.
IGMPv2 checks the TTL field and the Router Alert option. IGMPv3 checks TTL
field, ToS field and Router Alert option. Packets that fail the validation process
will be dropped.
IGMP Snooping Configuration
Configuring 802.1Q VLAN.
Configuration Guide 218