Avaya Cajun P882 - Manual (Page 127)

Cajun P550/P880/P882 Switch User Guide
Using VLANs, Spanning Tree, Hunt Groups, and VTP Snooping
4-11
Figure 4-6. Spanning Tree Information Dialog Box
2. Select the type of spanning tree you want to implement from
the Configuration field pull-down menu.
Refer to Table 4-3 for a definition of the Configuration field
parameters:
3. Click APPLY to save your changes, or CANCEL to restore
previous settings.
4. Select a name from the Bridge column to set the bridge
parameters. The Spanning Tree Bridge Configuration dialog
box opens (Figure 4-7).
Table 4-3. Spanning Tree Information Configuration Field Options
Parameter Definition
IEEE 802.1D Entire switch is a single IEEE 802.1D-compliant bridge.
Note: When the spanning tree mode is set to IEEE 802.D, BPDUs are
sent out ports in Clear (non-trunked) format even if the port has a
trunking format (3Com, 802.1Q or Dual layer) defined.
Per VLAN Each VLAN functions as a separate IEEE 802.1D-compliant bridge.
In order for spanning tree to function properly with 3Com trunked
ports, the spanning tree mode should be set to per-VLAN. In Per VLAN
spanning tree, there is one instance of spanning tree for each VLAN
and the BPDUs are tagged with the VLAN ID, ensuring they are
interpreted correctly on the receiving end.
Dual Layer Spanning tree terminates at edge of the switch network. Spanning Tree
per VLAN within the switch network.
Disable Spanning tree not used.