C
HAPTER
2
| Network Planning
Application Examples
– 27 –
ES-2024G/2024GP
M
AKING
VLAN
C
ONNECTIONS
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.
These switches also support multiple spanning trees which allow VLAN
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.
At Layer 3, VLANs are used to create an IP interface, where one or more
ports are assigned to the same IP segment. Traffic is automatically routed
between different IP segments on the same switch, without any need to
configure routing protocols.
Figure 11: Making VLAN Connections
N
OTE
:
When connecting to a switch that does not support IEEE 802.1Q
VLAN tags, use untagged ports.
VLAN unaware
switch
Testing
R&D
Finance
Marketing
VLAN 3
Finance
R&D
Testing
Tagged Ports
Untagged Ports
Tagged Ports
VLAN unaware
switch
VLAN 1
VLAN 2
VLAN 3
VLAN 4
VLAN 2
VLAN 1
Содержание iPECS ES-2024G
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