Enterasys Networks 2H253 manual Dynamicegress, Syntax dynamicegress action vid Options action, Vid

Built-in Commands

dynamic_egress

Description: Enables, disables or displays the status of the dynamic_egress control function. The command requires a corresponding VLAN Identifier (VID).

The dynamic_egress control function allows or disallows VLANs to be dynamically added to the dynamic Port VLAN Lists of a port. The default is that no dynamic Port VLAN Lists will be modified. The lists are modified based on the inbound traffic on a port. After a frame is classified into a VLAN (via PVID, L2/L3/L4 classification, etc.), that VLAN is added to the dynamic Port VLAN List of that port. The following three conditions must be met before the VLAN is added to the dynamic Port VLAN List.

1.The feature is enabled for that VLAN.

2.The frame was not Q-tagged (priority tagged or untagged is okay).

3.The SmartSwitch device is not currently in STP blocking or listening on that port.

After a VLAN has been added to the dynamic Port VLAN List, the entry is subject to time out (age out) if the port does not receive another frame for that VLAN within the aging time. The dynamic-egress aging time is equal to the Spanning Tree aging time (default is 300 seconds).

NOTE: Devices that do not source frames regularly (such as printers), may not operate properly with dynamic egress enabled. In these cases, it is recommended to manually create Port VLAN Lists.

For an example of how dynamic_egress functions, refer to Section 11.3.

Syntax: dynamic_egress [action] [vid]

Options: action:

status – Allows the status of the dynamic_egress function to be checked to see if it is enabled or disabled.

enable – Allows dynamic egress modification for the vid.

disable – Disallows dynamic egress modification for the vid.

vid:

The VID of the VLAN to be acted on. The VLAN must be one that has been configured in the switch before it can be selected. The maximum VID value that can be entered is 4095.

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