Allied-telesis AT-S39 Manuel d'utilisateur télécharger pdf (Page 96)

Section II: Local and Telnet Management

Drawbacks to

Port-based

VLANs

There are several drawbacks to port-based VLANs:

❑ It is not easy to share network resources, such as servers and

printers, across multiple VLANs. A router or Layer 3 switch must be

added to the network to provide a means for interconnecting the

port-based VLANs.

❑ The introduction of a router into your network could create

security issues from unauthorized access to your network.

❑ A VLAN that spans several switches will require a port on each

switch for the interconnection of the various parts of the VLAN.

For example, a VLAN that spans three switches would require one

port on each switch to interconnect the various sections of the

VLAN. In network configurations where there are many individual

VLANs that span switches, many ports can end up being used

ineffectively just to interconnect the various VLANs.

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Allied-telesis AT-S39 Manuel d'utilisateur Page 96