Making Vlan Connections; Figure 2-4. Making Vlan Connections - Edge-Core ES4512C Installation Manual

Making VLAN Connections

These switches support VLANs which can be used to organize any group of network
nodes into separate broadcast domains. VLANs confine broadcast traffic to the
originating group, and can eliminate broadcast storms in large networks. This
provides a more secure and cleaner network environment.
VLANs can be based on untagged port groups, or traffic can be explicitly tagged to
identify the VLAN group to which it belongs. Untagged VLANs can be used for small
networks attached to a single switch. However, tagged VLANs should be used for
larger networks, and all the VLANs assigned to the inter-switch links.
The switches also support multiple spanning trees which allow VLANs groups to
maintain a more stable path between all VLAN members. This can reduce the
overall amount of protocol traffic crossing the network, and provide a shorter
reconfiguration time if any link in the spanning tree fails.
R&D
VLAN 1
Tagged
Ports
VLAN 2
Testing
Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use
untagged ports.
1 3 5 7 9 11 13
2 4 6 8 10 12 14
Untagged Ports
VLAN
unaware
Finance
switch
Marketing
VLAN 3
VLAN 4

Figure 2-4. Making VLAN Connections

Application Examples
15 17 19 21 23
21
22 23
16 18 20 22 24
Tagged Port
Finance
VLAN 3
2
1000=Green 10/100=Yellow
Link
Power
/Act
1 3 5 7 9 11 13 15 17 19 21 23 Console
24 FDX Diag
Link
RPU
/Act
2 4 6 8 10 12 14 16 18 20 22 24
FDX
1000=Green 10/100=Yellow
ES4524C
VLAN
aware
switch
R&D
Testing
VLAN 1
VLAN 2
2-5