Filter
Top Products
Spanning Tree Protocol
D-14 HP ProLiant BL e-Class C-GbE Interconnect Switch User Guide
HP CONFIDENTIAL Codename: DeLorean Part Number: 263682-002 Last Saved On: 2/5/03 10:46 AM
The above graphic is an example of a common network design. The switches C and D have
redundant links to the backbone switches A and B using trunks. Trunks, by default, carry all
the VLAN traffic from VLAN 1 and VLAN 2. So switch C is not only receiving traffic for
VLAN 1, but it is also receiving unnecessary broadcast and multicast traffic for VLAN 2. It is
also blocking one port for VLAN 2. Thus, there are three redundant paths between switches
A and B and two blocked ports per VLAN. This increases the chance of a data loop.
Figure D-10: Example 2: A common network design
In this example, the VLAN definitions are extended to switches A and B. This gives only a
single blocked port per VLAN and allows the removal of all redundant links by removing
switch A or B from the network.