TP-Link T2600G-28SQ T2600G Series Switches CLI Reference Guide Guide - Page 181
ip igmp snooping header-validation, ip igmp snooping vlan-config
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T2600G-28TS(config)# ip igmp snooping drop-unknown 21.4 ip igmp snooping header-validation Description The ip igmp snooping header-validation command is used to enable IGMP Header Validation globally. To disable the IGMP Header Validation function, please use no ip igmp snooping command. 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. Syntax ip igmp snooping header-validation no ip igmp snooping header-validation Command Mode Global Configuration Mode Privilege Requirement Only Admin, Operator and Power User level users have access to these commands. Example Enable IGMP Header Validation: T2600G-28TS(config)# ip igmp snooping header-validation 21.5 ip igmp snooping vlan-config Description The ip igmp snooping vlan-config command is used to enable VLAN IGMP Snooping function or to modify IGMP Snooping parameters. To disable the VLAN IGMP Snooping function, please use no ip igmp snooping vlan-config command. To restore the default values, please use no ip igmp snooping vlan-config with specified parameters. Syntax ip igmp snooping vlan-config vlan-id-list [ rtime router-time | mtime member-time | ltime leave-time ] 158
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