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Figure 10: Making VLAN Connections
R&D
VLAN 1
VLAN 2
Testing
When connecting to a switch that does not support IEEE 802.1Q
N
:
OTE
VLAN tags, use untagged ports.
A
PPLICATION
Full-duplex operation only applies to point-to-point access (such as when a
1.
switch is attached to a workstation, server, or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.
Avoid using flow control on a port connected to a hub unless it is actually
2.
required to solve a problem. Otherwise back pressure jamming signals may
degrade overall performance for the segment attached to the hub.
As a general rule the length of fiber optic cable for a single switched link
3.
should not exceed:
1000BASE-SX: 550 m (1805 ft) for multimode fiber.
■
1000BASE-LX: 10 km (6.2 miles) for single-mode fiber.
■
Tagged
Ports
Untagged Ports
Finance
Marketing
VLAN 3
VLAN 4
N
OTES
C
HAPTER
VLAN
unaware
switch
Finance
VLAN 3
– 32 –
| Network Planning
2
Application Notes
Tagged Port
VLAN
aware
switch
R&D
Testing
VLAN 1
VLAN 2
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