Configuration Guide Share VLAN Configuration
Port 1 is a hybrid port; PVID is VLAN 2; VLAN 2 and VLAN 10 are untagged;
port 2 is a trunk port; all VLANs are allowed VLANs; the native VLAN is VLAN 1.
Access switch 2
Port 1 is a hybrid port; PVID is VLAN 3; VLAN 3 and VLAN 10 are untagged;
port 2 is a trunk port; all VLANs are allowed VLANs; the native VLAN is VLAN 1.
TV sets belong to different VLANs. When the data from TV set 1 arrives
accesses switches, it will be automatically added with VLAN 2’s tag. The access
switches learn the following address:
Upon receiving the data with VLAN 2 tag from the aggregate switches, the core
switch will check if port 1 connecting the core switches allows receiving the data.
If so, it removes the tag.
Sending packets to the server through a port
Upon receiving the data request, the server will return packets. When the
packets arrive the core switch, it adds VLAN 10 tag to the packets according to
its PVID. Since the VLAN 10’s address cannot be found, the core switch will
replicate and forward the packets in all trunk links. When the packets arrive the
aggregate switches, they will send them to the access switches through
downstream trunk links. Since all downstream TV sets allow the packets from
VLAN 10, the access switches remove the tag of packets and send them to the
TV sets.
Without Share VLAN, one user will access the video server and other users
receive unuseful response packets when the request packet does not belong to
the same VLAN as response packets. This will waste resources significantly.
When VLAN 10 is set to be the Share VLAN on the core switch, the core switch
learns the following address:
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