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Layer 2 switch VLAN isolation and all access to internet

tecnico41
Level 1
Level 1

We try to configure the switch SRW248G4 model with mouths that are common to each other in a VLAN (pvid2) and various other ports in another VLAN group (pvid3).
These two groups each should not be, but both have to be vented to the common port 48 which is Internet is.
1- proceeded to create the groups (create VLAN)
2- We mark each port is of "general" type. Default is marked "Trunk"
3- assign each port to the corresponding VLAN
4- we assign each port because VLAN is visible.

Once this is done, pinging from one port to another between different VLAN they do not respond until right there. Pinging mouth 48 from each VLAN group responds, right.
Once this is done after a few minutes the network has begun to collapse, the response time of ping exceeded 1500 m between computers and the network is saturated without internet access.
Can anybody help me?
thanks

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