Example 6 - Basic Understanding Of Vlans With Multicast Filtering - N-Tron 7012FX2 User Manual & Installation Manual

Example 6 – Basic understanding of VLANs with Multicast Filtering
Receiving Tagged VID
Port # in packet
TX1 Untagged
TX3 Untagged
TX2 Untagged
TX2 Untagged
TX3 Untagged
TX6 Untagged
TX3 Untagged
Note: If there are multiple ports on different VLANs, the 7012FX2 will apply the static multicast address to
the lowest VLAN-ID that is associated with one of the ports assigned to the static multicast address. If the
lowest VLAN-ID contains all the ports assigned to the static multicast address (an umbrella VLAN), it will
function for all those ports with no problems. This can be achieved with overlapping VLANs.
For further information and examples on overlapping vlans, see:
http://www.n-tron.com/pdf/overlappingportvlan.pdf
(Revised 2012-05-01)
Top of Form
Bottom of Form
Destination Transmitting
Address Port #s
01:00:00:00:00:01 TX2
01:00:00:00:00:02 TX6, TX8
01:00:00:00:00:01 TX1,TX3-TX8
01:00:00:00:00:02 TX1,TX3-TX8
01:00:00:00:00:01 TX2, TX4-TX8
01:00:00:00:00:02 TX8
01:00:00:00:00:02 TX6, TX8
Notes
Goes to ports TX1-TX8, but TX1 can only
send to TX2 (VLAN 4)
Goes to ports TX2, TX6-TX8 (VLAN 3) but
filter keeps it on ports TX6 and TX8 only
Goes to ports TX1-TX8, but won't go back
out the port it came in on
Goes to ports TX1,TX3-TX8
Goes to ports TX2, TX4-TX8
Goes to port TX8
Goes to ports TX6 and TX8
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