
Local Management: Overview, Setup, and Navigation
154
dynamic_egress:
Description:
Allows the dynamic egress control function to be enabled,
disabled, or the status viewed to see if the function is enabled or
disabled. The command requires a corresponding VID.
The dynamic egress control function allows or disallows VLANs to
be dynamically added to the dynamic Port VLAN Lists of a port.þ
The default is that no dynamic Port VLAN Lists will be
modified.þThe lists are modified based on the inbound traffic on a
port.þ 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
“Examples of Dynamic Egress use” on page 155.
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