I want to create one vlan in extreme switch but only access internet

[hussainsupari]

Please help me how to create separate VLAN for internet only use should not access intranet please give your expert advice on it 

[Brent_Addis]

>>>>in cli:
create vlan internet_only tag y

>>>>where y = the number vlan tag you wish to use.

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configure vlan internet only add ports x

configure vlan internet_only add ports z tagged

save configuration

x is the untagged port (IE Access port) you wish to use and z is the tagged (IE Upstream, could be a firewall) port you wish to use.

Extreme Documentation on vlans is available here: https://documentation.extremenetworks.com/exos_32.1/GUID-9FC94E71-1F71-46E6-A726-416BE5D640FF.shtml