Configuring IGMP and IGMP-Snoop Timers and expected behavior.
Both igmp timers and igmp-snoop timers values are configurable which results in both settings acting upon the same flow. It is also possible with igmp timers value greater than igmp-snooping timers value that you could get into a scenario where igmp-snoop membership is cleared momentarily. If you need to change the igmp timer values then it is suggest that you set them to a higher value than the current default igmp timer settings. It is important to note that with no igmp-snoop timer configuration, igmp-snoop will inherit the original igmp default timer settings regardless of how you have modified the igmp timer. NOTE: Unless there are specific application requirements it is recommended that you use the default settings for igmp and igmp-snoop timers. IGMP-Snoop Timer and IGMP Timer Testing Results and observations Configured igmp-snoop timers with igmp default timers: