Hello
You enable snooping on vlan 100 so snooping is expecting to see traffic tagged with vlan 100.
However you have made this vlan 100 native on the trunk interconnecting the router, and If you haven't done the same on the router sub interface for vlan 100 then effectively you have bridge two vlans to be untagged -
So now any host traffic on vlan 100 needing to send its traffic over the trunk will do so untagged and as a result when the router see this traffic untagged it will associate it with its native vlan interface and not vlan 100.
So its possible dhcp snooping isnt seeing the correct traffic to negate dhcp allocation
res
Paul
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Kind Regards
Paul
