Configuring the Cajun P550 Switch (Layer 2 & Layer 3)

4.From the Fast Start pull-down menu, select to Enable or Disable. When enabled, Fast Start mode ports begin forwarding traffic without waiting for the spanning tree negotiation to complete. Fast start eliminates the waiting time of listen and learn states. Ports immediately enter the forward state.

5.From the Known Mode pull-down menu, select to Enable or Disable. Selecting Enable suppresses the packets with unknown unicast destination addresses flooded to this port. For example, if a known end-station or file server is connected to the port, there’s no need to flood unknown unicasts to that port. You must manually enter a static MAC address for the station actually attached to the port.

6.From the 3Com Mapping Table pull-down menu, select an assignment to specify how incoming tagged frames from 3Com equipment are mapped to Lucent VLANs. Refer to “Creating 3Com Mapping Tables”, in Chapter 12, for more information on 3Com Mapping Tables.

7.Click APPLY to save your changes, or CANCEL to restore previous settings.

Examples of Switch Ports Settings for Various VLAN Connection Types

Use Table 3-11through Table 3-13 for recommended switch port settings for each connection type.

Note: Automatic VLAN Creation and VTP Snooping must not be enabled at the same time.

Table 3-11.Example 1. Trunk to Cisco Catalyst 5000TM

 

 

Parameter

Recommended Setting

 

 

Port VLAN

Default - causes untagged packets to be assigned to the

 

default VLAN.

 

 

Trunk Mode

Multi-layer- causes the port to send frames using the

 

multi-layer format.

 

 

VLAN Binding

Bind to All - binds the port to all VLANs known to the

 

switch.

 

 

Automatic VLAN

Enable (Disable if using VTP Snooping) - causes the

Creation

switch to learn new VLAN IDs that arrive at the port, and then

 

bind the port to these VLANs.

 

 

VTP Snooping

Enable - cause the switch to update its VLANs as they are

 

created, deleted, or changed on the Catalyst.

 

 

3-20

Cajun P550/P220 Switch Operation Guide