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Page 156 / 241 Scroll up to view Page 151 - 155
Vigor2130 Series User’s Guide
148
1:
TCP frames where the URG field is set must be able to
match this entry.
Any:
Any value is allowed.
z
Choose
IPv4
as the Frame Type. You will see
IP Parameters
on the bottom of the page.
If you choose
Other
as
IP Protocol Filter
, you will get the page as the following:
IP Protocol Value
When "Other" is selected for the IP protocol filter, you can
enter a specific value here. The range is 0 to 255. The
default value is “255”.A frame meeting this ACE matches
this IP protocol value.
Source IP
Specify the source IP filter for this ACE.
Any:
No source IP filter is specified.
Host
: Source IP filter is set to Host. Specify the source IP
address in the source IP Address field that appears.
Network:
Source IP filter is set to Network. Specify the
source IP address and source IP mask in the source IP
Address and source IP Mask fields that appear.
Source IP Address
Type the source IP Address here. This option is available
when you choose
Host
or
Network
as source IP Filter.
Source IP Mask
Type the source IP Mask here. This option is available
only when you choose
Network
as source IP.
Dest IP
Specify the destination IP filter for this ACE.
Any:
No destination IP filter is specified.
Host:
Destination IP filter is set to Host. Specify the
destination IP address in the destination IP Address field
that appears.
Network:
Destination IP is set to Network. Specify the
destination IP address and destination IP mask in the
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destination IP address and destination IP mask fields that
appear.
Dest IP Address
Type the Dest IP Address here. This option is available
when you choose
Host
or
Network
as destination IP filter.
Dest IP Mask
Type the Dest IP Mask here. This option is available only
when you choose
Network
as destination IP filter.
4.5 Bandwidth Management
Below shows the menu items for Bandwidth Management.
4.5.1 Session Limit
A PC with private IP address can access to the Internet via NAT router. The router will
generate the records of NAT sessions for such connection. The P2P (Peer to Peer) applications
(e.g., BitTorrent) always need many sessions for procession and also they will occupy over
resources which might result in important accesses impacted. To solve the problem, you can
use limit session to limit the session procession for specified Hosts.
In the
Bandwidth Management
menu, click
Sessions Limit
to open the web page.
To activate the function of limit session, simply click
Enable
and set the default session limit.
Enable
Click this button to activate the function of limit session.
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Disable
Click this button to close the function of limit session.
Default Sessions Limit
Defines the default session number used for each computer in
LAN.
Limitation List
Displays a list of specific limitations that you set on this web
page.
Start IP
Defines the start LAN IP address for limit session.
End IP
Defines the end LAN IP address for limit session.
Sessions Limit
Defines the available session number for each host in the
specific range of IP addresses. If you do not set the session
number in this field, the system will use the default session limit
for the specific limitation you set for each index.
Add
Adds the specific session limitation onto the list above.
Edit
Allows you to edit the settings for the selected limitation.
Delete
Remove the selected settings existing on the limitation list.
When you finish adding a new session limit, simply click
OK
. The following page will appear
for you to check.
4.5.2 Bandwidth Limit
The downstream or upstream from FTP, HTTP or some P2P applications will occupy large of
bandwidth and affect the applications for other programs. Please use Limit Bandwidth to make
the bandwidth usage more efficient.
In the
Bandwidth Management
menu, click
Bandwidth Limit
to open the web page.
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To activate the function of limit bandwidth, simply click
Enable
and set the default or
user-defined upstream and downstream limit.
Disable
Click this button to close the function of limit bandwidth.
Enable
Click this button to activate the function of limit bandwidth.
Smart Bandwidth Limit
Click this radio button to configure the default limitation for
bandwidth.
When session number exceeds –
type the value here as a
threshold to apply the smart bandwidth limit.
TX limit
- Define the default speed of the upstream for
each computer in LAN.
RX limit
- Define the default speed of the downstream for
each computer in LAN.
User-defined Bandwidth
Limit
Click this radio button to configure the user-defined
limitation for bandwidth.
Limitation List
- Display a list of specific limitations that
you set on this web page.
Start IP
- Bandwidth limit can be applied on certain IP
range. That’s, only the PCs within the range will be
influenced by the bandwidth limitation set here. Please
define the start IP address for the specific limitation.
End IP
- Define the end IP address for the specific
limitation.
TX Limit
- Define the limitation for the speed of the
upstream to be applied as specific limitation. If you do not
set the limit in this field, the system will use the default
speed for the specific limitation you set for each index.
RX Limit
- Define the limitation for the speed of the
downstream to be applied as specific limitation. If you do
not set the limit in this field, the system will use the default
speed for the specific limitation you set for each index.
Add
- Add the specific speed limitation onto the list above.
Edit
- Allows you to edit the settings for the selected
limitation.
Delete
- Remove the selected settings existing on the
limitation list.
When you finish adding a new bandwidth limit, simply click
OK
.
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4.5.3 Port Rate Control
A policer can limit the bandwidth of received frames. It is located in front of the ingress queue.
And a shaper can limit the bandwidth of transmitted frames. It is located after the ingress
queues. This page allows you to configure the switch port rate limit for Policers and Shapers.
Port
Represent LAN or WAN interface.
Policer Enabled
Check this box to enable policer function.
Policer Rate(Rx)
Type the number for policer function. The default value is 500.
It is restricted to 500-1000000 when the Policer Unit is set in
kbps, and it is restricted to 1-1000 when the Policer Unit is set
in Mbps.
Policer Unit
Determine the unit (kbps/Mbps) for policer.
Shaper Enabled
Check this box to enable shaper function.
Shaper Rate (Tx)
Type the number for shaper function. The default value is 500.
It is restricted to 500-1000000 when the Shaper Unit is set in
kbps, and it is restricted to 1-1000 when the Shaper Unit is set
in Mbps.
Shaper Unit
Determine the unit (kbps/Mbps) for shaper function.
4.5.4 QoS Control List
Deploying QoS (Quality of Service) management to guarantee that all applications receive the
service levels required and sufficient bandwidth to meet performance expectations is indeed
one important aspect of modern enterprise network.
One reason for QoS is that numerous TCP-based applications tend to continually increase their
transmission rate and consume all available bandwidth, which is called TCP slow start. If
other applications are not protected by QoS, it will detract much from their performance in the
overcrowded network. This is especially essential to those are low tolerant of loss, delay or
jitter (delay variation).
Another reason is due to congestions at network intersections where speeds of interconnected
circuits mismatch or traffic aggregates, packets will queue up and traffic can be throttled back
to a lower speed. If there’s no defined priority to specify which packets should be discarded
(or in another term “dropped”) from an overflowing queue, packets of sensitive applications
mentioned above might be the ones to drop off. How this will affect application performance?
There are two components within Primary configuration of QoS deployment:
z
Classification: Identifying low-latency or crucial applications and marking them for
high-priority service level enforcement throughout the network.

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