Switch Release Notes
Configuring the Cajun P550 Switch (Layer 2 & Layer 3)
Cajun P550/P220 Switch Operation Guide   3
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21
Configuring Fast Start Mode
Fast Start mode causes ports to begin forwarding traffic without waiting for the spanning 
tree negotiation to complete. 
Examples of situations where you may want to set a port to Fast Start mode are:
❒
End-station ports that do not need to participate in the full spanning tree 
negotiation
❒
Loop-free topologies that do not need spanning tree protocol to resolve redundant 
connections
To enable Fast Start for ports on a module associated with a selected bridge:
1.
In the 
System Configuration 
section of the Web Agent window, click 
Modules 
& Ports
. The Module Information dialog box opens.
2.
In the 
Switch Ports
 column, click on the 
switch port number
 listed for the 
selected module. The Switch Ports dialog box opens.
Table 3-12. Example 2. Trunk to 3Com SuperStack
TM
Parameter Recommended Setting
Port VLAN Default - This parameter is ignored when using 3Com 
VLANs.
Trunk Mode 3Com - Allows the switch to read the incoming VLAN tags.
VLAN Binding Static - This parameter is ignored when using 3Com VLANs.
Automatic VLAN 
Creation
Disable - This parameter is ignored when using 3Com VLANs.
Table 3-13. Example 3. Trunk to Bay Networks System 5000
TM
Parameter Recommended Setting
Port VLAN Default - Causes untagged packets to be assigned to the 
default VLAN.
Trunk Mode IEEE-802.1Q - Causes the port to send frames using the 
IEEE-802.1Q format. This assumes that you have configured 
the Bay Networks switch to use IEEE-802.1Q VLAN tagging as 
well.
VLAN Binding Bind to All - Binds the port to all VLANs known to the 
switch.
Automatic VLAN 
Creation
Enable - Causes the switch to learn new VLAN IDs that arrive 
at the port, and then bind the port to these VLANs.










