EDS-408A/405A Series User’s Manual

Featured Functions

100BaseTX full-duplex Link; only carries VLAN1 (path cost = 18)

Switch A

VLAN1

VLAN2

Switch B

100BaseTX full-duplex Link; only carries VLAN2 (path cost = 18)

Switch C

VLAN1

Block

802.1Q tagged,

VLAN1

VLAN2 10BaseTx half-duplex Link carries VLAN1, 2 (path cost = 100)

VLAN2

To avoid subdividing VLANs, all inter-switch connections should be made members of all available 802.1Q VLANs. This will ensure connectivity at all times. For example, the connections between Switches A and B, and between Switches A and C should be 802.1Q tagged and carrying VLANs 1 and 2 to ensure connectivity.

Configuring STP/RSTP

The following figures indicate the Spanning Tree Protocol parameters that can be configured. A more detailed explanation of each parameter is given below the figure. (NOTE: The user interface for EDS-408A shows 8 ports.)

At the top of this page, the user can check the Current Status of this function. For RSTP, you will see:

Now Active:

This shows the communication protocol being used—Turbo Ring, RSTP, or none.

Root/Not Root

This is displayed only when RSTP is selected as the mode of operation. It indicates whether or not this EDS is the Root of the Spanning Tree (the root is determined automatically).

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