5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide
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Parameters
vlan_id
(Optional) Indicates the VLAN identifier.
Default
The default is Disabled.
Command Mode
VLAN Config
5-467 set igmp header-validation
Enable header validation for IGMP messages.
When header validation is enabled, IGMP Snooping scans:
•
The time-to-live (TTL) field in the IGMP header and drops packets where TTL does not equal 1.
The TTL field should always be set to 1 in the headers of IGMP reports and queries.
•
Router alert option (9404) in the IP packet header of the lGMPv2 message and drops packets
that do not include this option.
•
Router alert option (9404) and ToS Byte = 0xC0 (Internet Control) in the IP packet header of
IGMPv3 message and drops packets that do not include these options.
No
command disables header validation for IGMP messages.
set igmp header-validation
no set igmp header-validation
Parameters
None
Default
The default is Disabled.
Command Mode
Global Config
5-468 set igmp interfacemode
Enable IGMP Snooping on all interfaces. When IGMP Snooping is enabled and the interface routing is
enabled or if it is a member of a port-channel (LAG) the IGMP Snooping functionality is disabled.
No
command disables IGMP Snooping on all interfaces.
set igmp interfacemode
no set igmp interfacemode
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