The disable-snooping parameter is essential and applicable only for Cisco Catalyst 6000/6500 series switches. Without this statement, the behavior is not affected. IGMP snooping does not constrain Layer 2 multicasts generated by routing protocols.
NLB generated 0100.5exx.xxxx when IGMP support is enabled and 0300.5exx.xxxx when disabled.
disable-snooping option is only available when using the mac-address of 0100.5exx.xxxx and not when address beigns 0300.5e.
Permanent Multicast address range is 126.96.36.199 - 188.8.131.52 and and hence they will not come under IGMP snooping, however the range is outside this so we should be able to disable-snoop but option is not available or not required.
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