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4.4.4 QoS
QoS (Quality of Service). This option will provide better service of selected network traffic
over various technologies. Deploying QoS management to guarantee that all application
receive the service levels required and sufficient bandwidth to meet performance expectations
is indeed one important aspect of modem enterprise network.
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4.4.5 VLAN
Virtual LAN (VLAN) is a group of devices on one or more LANs that are configured so
that they can communicate as if they were attached to the same wire, when in fact they are
located on a number of different LAN segments. Because VLANs are based on logical instead
of physical connections, it is very flexible for user/host management, bandwidth allocation and
resource optimization.
(1) Port-Based VLAN: each physical switch port is configured with an access list specifying
membership in a set of VLANs.
(2) ATM VLAN-using LAN Emulation(LANE) protocol to map Ethernet packets into ATM cells
and deliver then to their destination by converting an Ethernet MAC address into an ATM
address.
The key for the IEEE 802.1Q to perform the above functions is in its tags. 802.1Q-compliant
switch ports can be configure to transmit tagged or untagged frames. A tag field containing
VLAN (and/or 802.1p priority) information can be inserted into an Ethernet frame. If a port has
an 802.1Q-compliant device attached (such as another switch), these tagged frames can carry
VLAN membership information between switches, thus letting a VLAN span multiple switches.
However, it is important to ensure ports with non-802.1Q-compliant devices attached are
configured to transmit untagged frames. Many NICs for PCs and printers are not
802.1Q-compliant. If they received a tagged frame, they will not understand the VLAN tab and
will drop the frame. Also, the maximum legal Ethernet frame size for tagged frames was
increased in 802.1Q (and its companion, 802.3ac) from 1518 to 1522 bytes. This could cause
network interface cards and older switches to drop tagged frames as “oversized”
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Î
Assign VLAN PVID for each interface:
You can assign ATM VC, Ethernet (LAN) port, and
Wireless LAN port’s PVID in this section.
Î
Define VLAN Group:
Based on each VLAN group, you can configure each group’s VLAN
setting. You can configure up to 8 VLAN settings.
4.4.6 ADSL
Select this option to set ADSL Mode and ADSL Type information.
ADSL Mode:
You can set your
ADSL mode
in this section. The option has Auto Sync-up,
ADSL2+, ADSL2, G.DMT, T1.413, G.LITE
ADSL Type:
ANNEX A, ANNEX I, ANNEX A/L, ANNEX M, ANNEX A/I/J/L/M
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4.5 Access Management
4.5.1 ACL
Go to
Access Management
Æ
ACL
to enable remote management. You may use telnet or
Web to remotely manage the ENDSL-A2+4R2. User just needs to enable Telnet or Web and
give it an IP address that wants to access the ENDSL-A2+4R2. The default IP 0.0.0.0 allows
any client to use this service to remotely manage the ENDSL-A2+4R2.
ACL:
There has
Activated
&
Deactivated
option. The default setting is
Deactivated
which
means all IP can access via router. If you choose
Activated
, you only can access via router by
listed IP addresses.
ACL Rule Index:
Index number from 1 and up to 16.
Active:
Once you choose
Yes
then you can access the IP via router.
Application:
Each of these labels denotes a service that you may use to remotely manage the
Router. Choices are
Web, FTP, Telnet, SNMP, Ping, ALL
.
Interface:
Select the access interface. Choices are
WAN, LAN
and
Both.
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For Example:
How to set your ACL?
1. You must choose
Activated
to enable your ACL function.
2.
Select the ACL Rule Index number (up to 16 number)
3.
You can set the specific
Secure IP address
or set
0.0.0.0
for all IPs.
4. Choose the
Application
which you want to access for this ACL Rule index.
5. Select the
Interface
you want to access from.
6.
After all settings are ready, click
SAVE
and continue next ACL Rule Index setting.
[Note]
1. You must set one ACL index to access your router via LAN interface. If you don’t, your
router cannot access other listed IP Address. (Refer to Index 1).
2. Remember! Once you active your ACL function, you only can access via router by
listed Secure IP Address.
4.5.2
IP Filter
The Router provides extensive firewall protection by restricting connection parameters
to limit the risk of intrusion and defending against a wide array of common hacker attackers.
Go to
Access Management
Æ
Filter
to set different IP filter rules of a given protocol (TCP,
UDP, or ICMP) and a specific direction (incoming, outgoing, or both) to filter the packets.
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IP Filter is a more complex filtering tool, based more on IP and custom rules. Each of the
indices can hold six rules, and each interface can have four associated indices, allowing 24

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