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Chapter 5
Cajun P550/P880/P882 Switch User Guide
5. Select Enable from the Known Mode field pull-down menu
to suppress any packets that have unknown unicast
destination addresses and are 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. Reselect
Disable to prevent the suppressing of packets.
6. Select 3Com Default from the 3Com Mapping Table field pull-
down menu to specify how incoming tagged frames from
3Com equipment are mapped to Lucent VLANs. Refer to
"Creating 3Com Mapping Tables", in Chapter 4 for more
information.
7. Click APPLY to save your changes, or CANCEL to restore
previous settings.
Refer to Table5-9 through Table5-11 for examples of the
recommended switch port settings for each connection type.
* Note: Do not enable Automatic VLAN Creation and VTP
Snooping at the same time.
Table 5-9. Example 1. Trunk to Cisco Catalyst 5000
TM
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 Creation
Enable (Disable if using VTP Snooping) - Causes
the switch to learn new VLAN IDs that arrive at the
port, and then bind the port to these VLANs.
VTP Snooping Enable - Causes the switch to update its VLANs as
they are created, deleted, or changed on the Catalyst.
Table 5-10. 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.