Configuring Advanced Features

 

 

Spanning Tree Protocol (STP)

 

 

 

 

Problem:

 

 

 

Solution:

 

STP enabled with 2

 

STP enabled with

 

separate (non-trunked)

 

one trunked link.

 

links blocks a VLAN link.

 

 

 

 

 

 

 

Nodes 1 and 2 cannot communicate because STP is blocking the link.

Features

Advanced Configuring

 

 

Nodes 1 and 2 can communicate because STP sees the trunk as a single link and 802.1Q (tagged) VLANs enable the use of one (trunked) link for both VLANs.

Figure 9-72. Example of Using a Trunked Link with STP and VLANs

For more information, refer to “Spanning Tree Protocol Operation with VLANs” on page 9-73.

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