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This page includes the following fields: 
 
Object Description 
RSTP mode:  The user must enable the RSTP function first before configuring 
the related parameters. 
Priority (0-61440): The switch with the lowest value has the highest priority and is 
selected as the root. If the value is changed, the user must 
reboot the switch.  
The value must be a multiple of
 4096 according to the protocol 
standard rule. 
Max Age (6-40):  The number of seconds a switch waits without receiving 
Spanning-tree Protocol configuration messages before 
attempting a reconfiguration.  
Enter a value between 6 through 40. 
Hello Time (1-10): 
The time that controls the switch to send out the BPDU packet 
to check RSTP current status.  
Enter a value between 1 through 10. 
Forward Delay Time (4-30): The number of seconds a port waits before changing from its 
Rapid Spanning-Tree Protocol learning and listening states to 
the forwarding state.  
Enter a value between 4 through 30. 
 
NOTE: 
Follow the rule as below to configure  the MAX Age, Hello Time, and Forward 
Delay Time.  
2 x (Forward Delay Time value -1) > = Max Age value >= 2 x (Hello Time value +1). 
 
Port Configuration 
This web page provides the port configur ation interface for RSTP. You can assign 
higher or lower priority to each port. Rapi d spanning tree will have the port with the 
higher priority in forwarding state and block  other ports to make certain that there is 
no loop in the LAN.  
						

							
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Figure 5-42:  RSTP Port Configuration interface 
 
This page includes the following fields: 
 
Object Description 
Path Cost: The cost of the path to the other bridge from this transmitting bridge 
at the specified port. Enter 
a number 1 through 200,000,000. 
Priority: Decide which port should be blocked by setting its priority as the 
lowest. Enter a number between 0 an
d 240. The value of priority must 
be the multiple of 16. 
Admin P2P:  The rapid state transitions possible within RSTP are dependent upon 
whether the port concerned can only be connected to exactly 
another bridge (i.e. it is served by a point-to-point LAN segment), or 
can be connected to two or more bridges (i.e. it is served by a shared 
medium LAN segment). This function allows the P2P status of the link 
to be manipulated administratively. True means the port is regarded 
as a point-to-point link. False means the port is regarded as a shared 
link. Auto means the link type is determined by the auto-negotiation 
between the two peers. 
Admin Edge: 
The port directly connected to end stations won’t create bridging loop 
in the network. To configure the port as an edge port, set the port to 
“True” status. 
Admin Non STP: The port includes the STP mathematic calculation. True is not 
including STP mathematic calculation. False is including the STP 
mathematic calculation.  
						

							
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NOTE:  Path cost 0 is used to indicate auto -configuration mode. When the short path 
cost method is selected and the defaul t path cost recommended by the IEEE 8021w 
standard exceeds 65,535, the de fault is set to 65,535. 
By default, the system automatically detects the speed and duplex mode used on 
each port, and configures the path cost  according to the values shown below. 
Table 5-1:  Recommended STP Path Cost Range 
Port Type  IEEE 802.1D-1998  IEEE 802.1w-2001  
Ethernet  50-600   200,000-20,000,000  
Fast Ethernet  10-60   20,000-2,000,000  
Gigabit Ethernet  3-10   2,000-200,000  
Table 5-2:  Recommended STP Path Costs 
Port Type  Link Type  IEEE 802.1D-1998  IEEE 802.1w-2001  
Ethernet  Half Duplex 
Full Duplex 
Trunk  100  
95  
90   2,000,000  
1,999,999  
1,000,000  
Fast Ethernet  Half Duplex 
Full Duplex 
Trunk  19  
18  
15   200,000 
100,000 
50,000  
Gigabit Ethernet  Full Duplex 
Trunk  
4  
3   10,000 
5,000  
SNMP Configuration 
Simple Network Management Protocol (SNMP)
 is the protocol developed to manage 
nodes (servers, workstations, routers, switch es and hubs etc.) on an IP network. SNMP 
enables network administrators to manage  network performance, find and solve 
network problems, and plan for networ k growth. Network management systems 
learn of problems by receiving traps or  change notices from network devices 
implementing SNMP.  
						

							
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System Configuration 
Figure 5-43:  SNMP System Configuration interface 
 
This page includes the following fields: 
 
Object Description 
Community Strings:  Here you can define the new community string set and remove the unwanted community string. 
String: Fill the name string. 
RO: Read only. Enables requests accompanied by this community 
string to display MIB-object information. 
RW: Read/write. Enables requests accompanied by this community 
string to display MIB-object information and to set MIB objects. 
Click APPLY. 
To remove the community string, select the community string that 
you defined before and click REMOVE.  
The strings of Public_RO and Private_RW are default strings. You 
can remove them but after resetting the switch to default, the two 
strings show up again. 
Agent Mode:  Select the SNMP version that you want to use it. And then click CHANGE to switch to the selected SNMP version mode. 
 
Trap Configuration 
A trap manager is a management station  that receives the trap messages generated 
by the switch. If no trap manager is define d, no traps will be issued. To define a 
management station as a trap manager,  assign an IP address, enter the SNMP 
community strings, and sele ct the SNMP trap version.  
						

							
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Figure 5-44:  Trap Managers interface 
 
This page includes the following fields: 
 
Object Description 
IP Address:  Enter the IP address of the trap manager. 
Community:  Enter the community string for the trap station. 
Trap Version:  Select the SNMP trap version type—v1 or v2c. 
 
SNMPV3 Configuration 
Configure the SNMP V3 function. 
Figure 5-45:  SNMP V3 configuration interface - User Table 
  
						

							
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• Context Table 
Configure SNMP v3 context table. Assign th e context name of context table. Click ADD 
to add context name. Click REMOVE  to remove unwanted context name. 
•  User Table 
Configure SNMP v3 user table. 
This page includes the following fields: 
 
Object Description 
User ID:  Set up the user name. 
Authentication 
Password:  Set up the authentication password. 
Privacy Password:  Set up the private password. 
• 
Group Table 
Configure SNMP v3 group table. 
Figure 5-46:  SNMP V3 configuration interface - Group Table 
 
 
 
  
						

							
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This page includes the following fields: 
 
Object Description 
Security Name (User ID):  Assign the user name that you have set up in user table. 
Group Name:  Set up the group name. 
•  Access Table 
Configure SNMP v3 access table. 
Figure 5-47:  SNMP V3 configuration interface - Access Table 
 
This page includes the following fields: 
 
Object Description 
Context Prefix:  Set up the context name. 
Group Name:  Set up the group. 
Security Level:  Select the access level. 
Context Match Rule:  Select the context match rule. 
Read View Name:  Set up the read view. 
Write View Name:  Set up the write view. 
Notify View Name:  Set up the notify view.  
						

							
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• MIBview Table 
Configure MIB view table. 
Figure 5-48:  SNMP V3 configuration interface - MIBView Table 
 
This page includes the following fields: 
 
Object Description 
ViewName:  Set up the name. 
Sub-Oid Tree:  Fill the Sub OID. 
Type:  Select the type – exclude or included. 
 
  
						

							
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QoS Configuration 
Quality of Service (QoS) is an advanced traffi c prioritization feature that allows you to 
establish control over network traffic. QoS  enables you to assign various grades of 
network service to different types of traffi c, such as multi-media, video, protocol-
specific, time critical, and file-backup traffic. 
QoS reduces bandwidth limitations, delay, loss , and jitter. It also provides increased 
reliability for delivery of your data and allows  you to prioritize certain applications 
across your network. You can define ex actly how you want the switch to treat 
selected applications and types of traffic. 
You can use QoS on your system to: 
•  Control a wide variety of network traffic by: 
•  Classifying traffic based on packet attributes. 
•  Assigning priorities to traffic  (for example, to set higher pr iorities to time-critical or 
business-critical applications). 
•  Applying security policy through traffic filtering. 
•  Provide predictable throughput for multimedia applications such as video 
conferencing or voice over IP by minimizing delay and jitter. 
•  Improve performance for specific types of  traffic and preserve performance as 
the amount of traffic grows. 
•  Reduce the need to constantly  add bandwidth to the network. 
•  Manage network congestion. 
 
The QoS page of the Switch contains thr ee types of QoS mode - the CoS mode, TOS 
mode or Port-based mode can  be selected. Both the three mode rely on predefined 
fields within the packet to determine the output queue.  
•  CoS / 802.1p Tag Priority Mode -The output queue assignment is determined by 
the IEEE 802.1p VLAN priority tag. 
•  TOS / DSCP Mode - The output queue assi gnment is determined by the TOS or 
DSCP field in the IP packets. 
•  Port-Based Priority Mode - Any packet receiv ed from the specify high priority port 
will treated as a high priority packet. 
  
						

							
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QoS Policy and Priority Type 
Here you can choose to use an 8-4-2-1 queuing scheme or a strict priority scheme, or 
select the priority type to configure QoS policy. 
Figure 5-49:  QoS Configuration interface 
 
This page includes the following fields: 
 
Object Description 
Qos Policy:  Select the QoS policy rule. 
Using the 8,4,2,1 weight fair queue scheme: The switch will follow 
8:4:2:1 rate to process priority queue from High to lowest queue.  
For example, while the system processing, 1 frame of the lowest 
queue, 2 frames of the low queue, 4 frames of the middle queue, and 
8 frames of the high queue will be
 processed at the same time in 
accordance with the 8,4,2,1 policy rule. 
Use a strict priority scheme: Always the higher queue will be 
processed first, except the higher queue is empty. 
Priority Type:  There are 5 priority type selections available— 
Port-based 
TOS only 
COS only 
TOS first 
COS first 
Disable means no priority type is selected.