ZyXEL Communications OMC-2301, User Manual

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Chapter 6 Basic Setting
OMC-2301 User’s Guide
73
6.11 Introduction to VLANs
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into
multiple logical networks. Devices on a logical network belong to one group. A device can
belong to more than one group. With VLAN, a device cannot directly talk to or hear from
devices that are not in the same group(s); the traffic must first go through a router.
In MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and security
among the subscribers. When properly configured, VLAN prevents one subscriber from
accessing the network resources of another on the same LAN, thus a user will not see the
printers and hard disks of another user in the same building.
VLAN also increases network performance by limiting broadcasts to a smaller and more
manageable logical broadcast domain. In traditional switched environments, all broadcast
packets go to each and every individual port. With VLAN, all broadcasts are confined to a
specific broadcast domain.
"
VLAN is unidirectional; it only governs outgoing traffic.
See Chapter 8 on page 83 for information on IEEE 802.1Q tagged VLANs.
Limited Number of
Learned MAC
Addresses
Use this field to limit the number of (dynamic) source MAC addresses that may
be learned on the ONU.
For example, if you set this field to "8", then only the devices with these eight
learned MAC addresses may access through the ONU at any one time. A ninth
device would have to wait until one of the eight learned MAC addresses aged
out. MAC address aging time can be set in the EPON Setup screen.
Select the number of MAC address an ONU can learn.
Encryption Mode You can set the OLT to encrypt data using AES128 to provide secure
communication through the ONUs.
Specify the direction of the traffic to which the OLT encrypts. Data encryption
may affect transmission performance.
Select
Disabled if you do not want to encrypt data.
Add Click Apply to save the settings.
Cancel Click Cancel to reset the fields to your previous configuration.
Clear Click Clear to reset the fields to the default settings.
Name This field displays the descriptive name of a profile.
Active This field displays whether the priority profile is active or not.
Max. Upstream This field displays the maximum upstream bandwidth.
Max. Downstream This field displays the maximum amount of downstream bandwidth.
Addr. Learning This field displays the maximum number of MAC addresses is allowed.
Delete Click Delete to remove the selected entry from the summary table.
Cancel Click Cancel to clear the Delete check boxes.
Table 17 EPON Profile (continued)
LABEL DESCRIPTION