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Chapter 9 VLAN
MGS3520 Series User’s Guide
116
9.10 Port-based VLAN Setup
Port-based VLANs are VLANs where the packet forwarding decision is based on the destination MAC
address and its associated port.
Port-based VLANs require allowed outgoing ports to be defined for each port. Therefore, if you wish
to allow two subscriber ports to talk to each other, for example, between conference rooms in a
hotel, you must define the egress (an egress port is an outgoing port, that is, a port through which
a data packet leaves) for both ports.
Port-based VLANs are specific only to the Switch on which they were created.
Note: When you activate port-based VLAN, the Switch uses a default VLAN ID of 1. You
cannot change it.
Note: In screens (such as
IP Setup
and
Filtering
) that require a VID, you must enter 1
as the VID.
The port-based VLAN setup screen is shown next. The
CPU
management port forms a VLAN with all
Ethernet ports.
MAC Limit
Number
Use this field to limit the number of (dynamic) MAC addresses that may be learned on a port
in a specified VLAN. For example, if you set this field to "5" on port 2, then only the devices
with these five learned MAC addresses may access port 2 at any one time. A sixth device
would have to wait until one of the five learned MAC addresses aged out. MAC address aging
out time can be set in the Switch Setup screen. The valid range is from “0” to “16384”. If
you enter 0 here, the Switch automatically changes to use the maximum value (16384).
Note: You also set the MAC address learning limit in the
Port Security
screen. If you
configure two different limits, the Switch bases on the smaller one.
Add
Click
Add
to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the
Save
link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Index
This field displays the index number of the rule. Click an index number to change the
settings.
Active
This field displays
Yes
when the rule is activated and
No
when is it deactivated.
VID
This field displays the ID number of the VLAN to which the port belongs.
Port
This field displays the number of the port to which this rule is applied.
MAC Learning
This field displays
Y
when the MAC address learning limit is enabled in this rule. Otherwise,
it displays
N
.
MAC Limit
Number
This is the maximum number of MAC addresses which a port can learn in a VLAN.
Delete
Check the rule(s) that you want to remove in the
Delete
column and then click the
Delete
button.
Cancel
Click
Cancel
to clear the
Delete
check boxes.
Table 34
Advanced Application > VLAN > VLAN MAC Learning (continued)
LABEL
DESCRIPTION