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VLAN Tagging Mode

Sets the VLAN tagging mode of the virtual port; possible values are Tagged and Untagged. As explained previously, only one virtual port on each TS port can be untagged. All other virtual ports must be tagged and the 802.1Q VLAN ID must be the same in both ends.

Because VLAN tagging mode imposes a small overhead, the VLAN that is expected to have the largest amount of traffic should be untagged.

Default: Untagged for the first virtual port and Tagged for the subsequent ports.

FC Modification

Enabled FC modification preserves frame priority during translation between Ethernet and Token Ring (both directions). Possible values are Enabled and Disabled. As discussed earlier, a VLAN frame tag also contains a 3-bit priority field. If FC modification is enabled, the Token Ring frame priority in the FC byte is set to the frame tag priority. If FC modification is disabled, the FC priority is set to 0, and the frame tag priority is discarded.

When the SSIM-H2-02 inserts a frame tag in a frame, and FC modification is enabled, the SmartStack SSIM-H2-02 module uses the FC priority from the Token Ring frame. Otherwise the frame tag priority is set to 0 and the FC priority is discarded.

Default: Disabled

Address Aging Time

Sets the aging time for addresses and RIFs learned on an TS port. Possible value are 1 to 9999 minutes or 0 to disable aging. When there has been no activity on an address it is deleted from the address table.

For an address using the RIF entry, when no frames with the RIF have been received for the specified period of time, the RIF and address entry is deleted. Only for address entries known from the host is the status of the address changed to RIF unknown.

Default: 5 minutes

RIF Not Learn Interval

Sets the learning blocked interval for RIF entries. Possible values are 0 to 900 seconds. A new RIF cannot be learned unless a specified period of time has passed since the activity on current RIF entry was seen.

Default: 20 seconds

SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide

Configuration

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Cabletron Systems SSIM-H2-02 manual Vlan Tagging Mode, FC Modification, Address Aging Time, RIF Not Learn Interval