N-Tron 9000 Series - Manual (Page 135)

5/17/2007 page 135 of 138
Example 5 – Basic understanding of Overlapping VLANs
VLAN Configuration View Ports Configuration View
VLAN Status : Enable
VLAN ID VLAN Name Untagged Port(s) Tagged Port(s) Mgmt Port Admit Mirror Port
1 Default VLAN -- -- YES All 0
2 VLAN -2 A1-A6,B1-B6,C1-C6,D1-D6 -- YES All 0
3 VLAN -3 A2-A6,B1-B6,C1-C6,D1-D6 -- YES All 0
4 VLAN -4 A1-A2 -- YES All 0
Receiving
Port # Tagged VID
in packet Destination
Address Transmitting
Port #s Notes
Port A1 Untagged MAC on port A2 Port A2 Unicast Traffic
Port A1 Untagged MAC on port A3 -- Packet Discarded
Port A1 VID 4 MAC on port A2 Port A2 Strips VID off packet
Port A1 VID 4 Unknown MAC Port A2 Strips VID off packet & Floods VLAN
4
Port A2 Untagged MAC on port A1 Port A1 Unicast Traffic
Port A2 Untagged MAC on port A5 Port A5 Unicast Traffic
Port A2 VID 2 or 3 MAC on port A5 Port A5 Strips VID off packet
Port A2 Untagged Unknown MAC Port A1,B1-D6 Floods VLAN 2
Port A3 Untagged MAC on port A1 -- Packet Discarded
Port A3 Untagged MAC on port A2 Port A2 Unicast Traffic
Port A3 Untagged MAC on port A5 Port A5 Unicast Traffic
Port A3 VID 2 or 3 MAC on port A2 Port A2 Strips VID off packet
Example 6 – Basic understanding of VLANs with Multicast Filtering
VLAN Configuration View Ports Configuration View
VLAN Status : Enable
VLAN ID VLAN Name Untagged Port(s) Tagged Port(s) Mgmt Port Admit Mirror Port
1 Default VLAN -- -- YES All 0
2 VLAN -2 A1-A6,B1-B6,C1-C6,D1-D6 -- YES All 0
3 VLAN -3 A2-A6,B1-B6,C1-C6,D1-D6 -- YES All 0
4 VLAN -4 A1-A2 -- YES All 0
Display Static Multicast Group Address(es)
Multicast Address Port List
01:00:00:00:00:01 1-24
01:00:00:00:00:02 1,6,8
Receiving
Port # Tagged VID
in packet Destination
Address Transmitting
Port #s Notes
Port 1 Untagged 01:00:00:00:00:01 Port 2
Goes to Ports 1-24, but port 1 can only
send to Port 2 (VLAN 4)
Port 1 Untagged 01:00:00:00:00:02 -- Packet Discarded
Port 2 Untagged 01:00:00:00:00:01 Port 1,3-24
Goes to Ports 1-24, but won’t go back out
the port it came in on
Port 2 Untagged 01:00:00:00:00:02 Port 1,6,8 Goes to ports 1,6,8
Port 3 Untagged 01:00:00:00:00:01 Port 2,4-24
Goes to Ports 1-24, but can’t talk to Port 1
since it is on a different VLAN
Port 3 Untagged 01:00:00:00:00:02 Port 6,8
Goes to Port 1,6,8, but can’t talk to Port 1
since it is on a different VLAN
Note: If there are multiple ports on different VLANs, the 9000 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.
Port
No
Port
Name
PVID
1 A1 4
2 A2 2
3 A3 3
... … …
23 D5 3
24 D6 3
Port
No
Port
Name
PVID
1 A1 4
2 A2 2
3 A3 3
... … …
23 D5 3
24 D6 3