1. Our PoE switch (PSE chip) had 2 kinds over load protection
    Surge current protection: over current af: 892mA at:1200mA)
    PSE chip also can offer over 15.5W/30W in af/at mode(max af: 448mA, at: 767mA), when over max current also cute off power.
2. UL must test POE system in shorted that system must enable protected function. Chip vender had approved by UL.
3. Volktek design fuse for double protecting in over load or shorted to protection PSE chips in all PoE switch.
4. If over current over fuse spec, fuse will be destroyed.

The Loop Detection feature in Volktek switches detects a loop in the network, blocks the port causing the loop and avoids degradation of network performance.

A Switching Loop occurs in a network when there are more than one Layer 2 (OSI model) paths between two endpoints.  For example, multiple connections between two network switches or two ports on the same switch connected to each other will create a loop and result in a down network situation.

1.  Install a larger network cabinet for proper airflow and heat dissipation.
2.  Avoid installing cables in front of switch and network cabinet air vents.
3.  In case of a fully-enclosed cabinet, use exhaust fans and perforated walls or doors to facilitate air flow

Username: admin
Password: admin 

CLI Modes in Volktek Switches	Symbol/Command
User Mode	>
Privilege Mode	#
Global Configuration Mode	(config)#
Interface Configuration Mode	(config-if)#

1. Managed Switches
    - GUI
    - Console and
    - Telnet
2. Lite-Managed Switches
    GUI
3. Un-managed switches
    No​

192.168.0.254

For VLAN priority, you can configure by
-  Port-based
-  QinQ
-  MAC-Based
-  ALC

For IGMP snooping and MVR, user can set the multicast IP address, then SW will translate to MAC address. For static multicast MAC address, this is L2 function and use in special case when user understand and want to fix this MAC to specific ports.

Start-up Time is the time the switch will ping to the PD initially after the PD has been start-up.  If the PD responds, the switch will use the Interval + Retry setting to continue the next communication.  If the PD has no response, then the switch will take Action setting.  The Start-up time setting can be configured from 60~300 seconds which the user can configure base on the specific PD re-booting time.

The switch will not drop to a lower priority port at that time, it will take effect when the link is down or power is cycled.

If power is cycled, all PoE ports will turn on at the same time.  If this potentially causes an issue, the used can configure a power delay for each port and determine which ports will have PoE first.

Example:  
The total PoE power is 90W.  Each port's powered devices requires 30W.

Port	PoE Priority	Power Delay (seconds)
1	Critical	50
2	Critical	51
3	Critical	52
5	Low	10

Once power cycles, the switch will provide power base on a power delay.  Thus, the PD under port 4, 1, 2 will have power and port 3 has no power.  Once port 4 link is down/up, then port 3 will have power.  It is better to configure high priority ports with low value for power delay.

 

Example:  

Week	Check	Action	Start	End
Monday	Yes	Enable	0	7
Monday	Yes	Enable	19	24

Instead of taking Action "enable" for your required time range, you can take Action “disable” for the time 7~19

Monday
Week
Check
Action
1
2
3
4
5
6
7
8
»

(Web GUI is enabled by default setting)
- To Enable Web GUI through CLI:
   L2SWITCH(config)#http server port 80
- Disable Web GUI through CLI:
   L2SWITCH(config)#no web server
- Disable Web GUI through GUI: 
   Go to Maintenance >> choose Server and Disable​

1. In global configuration:
   -   Choose state enable/disable to activate this function
   -   Choose which method you prefer:  Local or Radius
   -   Guest VLAN:  Keep as default “0”, if you configure it, please configure on access ports, not on trunk ports
   -   Input Primary/Secondary server info
   -   Input Local Users/Passwords
2. In port setting
    -   You must enable state, and don’t enable all ports at the same time
    -   Control direction: In your preference
    -   Reauthentication
    ＃Disable: If you don’t need supplicant to re-enter username/password when re-auth
    ＃Enable: If you want supplicant to enter username/password when re-auth

>> For convenience:  You should disable (Which means the switch Authenticator will do itself)
    -  Port Control:  Keep as Auto
    -  Guest VLAN:  Depends on your global config
    -  Max-req timer:  Base on your preference
    -  Reauth-period or reAuthWhen:  A timer used by the Reauthentication Timer state machine to determine when reauthentication of the Supplicant takes place.
    -  Quiet Period or QuietWhile:  A timer used by the Authenticator (SW) state machine to define periods of time during which it will not attempt to acquire a Supplicant.
    -  Supp-timeout or authWhile:   A timer used by the Supplicant to determine how long to wait for a request from the Authenticator before timing it out.
    -  Server-timeout or aWhile: A timer used by the Backend Authentication state machine in order to determine timeout conditions in the exchanges between the Authenticator and EAP.
We have no recommendation for you, but hope the above information will help you decide the parameters.

Both T & A indicate member ports in LACP, where T is an inactive link (link down) and A is an active link (link up).

Each unit = 652pps.  Max units which can be configured = 1488000/652 = 2282 ~ 2300 units.

If user configures the Management Host, the switch can only be managed by the host.  The Max Host that can be configured is 3, and the Host IP should be under the same management VLAN.

The power circuit for this model ranges from 12 to 57VDC. The switch can accept an input voltage up to 60V, though it will generate an alarm when power is over 57VDC.

Yes. Dual Homing can work with LACP. Under the Dual Homing setting, you can configure active/backup link by port or trunk.

Yes, the switch will generate a log.

a) Volktek PoE switches have 2 kinds of overload protection Surge current protection: Over current IEEE 802.3 af: 892mA and IEEE 802.3 at:1200mA, while PSE chips also can offer over 15.4W/30W in IEEE 802.3 af/at mode (max IEEE 802.3 af: 448mA, IEEE 802.3 at: 767mA) When the power current exceeds the max the switch cuts the power automatically.

b) Is mandatory for PoE chip vendors to have UL approval. PoE systems have to be tested under short circuit conditions that enable the protection function to confirm it is safe of use. Volktek PoE switches are designed with a fuse that conducts electricity during overload and shorted situations to protect PSE chips. The fuse will be destroyed and the device is safe from damage. If over current over fuse spec, the fuse will be destroyed and save the device from damage.

1. Prevent against network storms
Correct configuration of the network, using a robust ring resiliency protocol between the switches is necessary for network redundancy as well as loop prevention. One can prefer ERPS or Xpress rings for industrial use as their network recovery rate is below 50msec.
 
2. Proper configuration for high-Security authentication on all connected ports
Switch ports should be set up to never allow data exchange with a connected device until that device has provided authentication credentials that have been verified by the network’s authentication server. The switch ports which are not used should be disabled/shut down to prevent being hijacked in any way.
 
3. Real-time network Alarm
Volktek provides various options for real-time network alarm from hardware to software. With 24V/1A terminal connection through hardware to allow connects to the alarm system. Standard network management protocols, Syslog, Email Alarm provide messages that are sent upon state change like ports being plugged or unplugged, un-authentication access etc. Network Management Stations receive and display these alarms so that necessary action can be taken on the network connected devices.

These general installation and maintenance instructions are provided by the Volktek support team. Always follow standard recommendations relating to proper installation, testing, maintenance, and reconditioning. In order to maximize system capabilities and avoid potential pitfalls, installers need to have an understanding of the best practices in configuring Ethernet network infrastructure for the factory floors.

 

I. Do Proper Earthing: 
   The Switches, Network Cabinet, and Rack to be placed in buildings or installation sites are kept above certain height from the ground level.

1. Why we need to do proper Earthing?
   ✓ To prevent exposing the switch to ESD
   ✓ To prevent the causes of equipment failure

 

2. How to check the Earthing Condition?
   ✓ Use a multi-meter and connect Red probe in Earth and Black probe in Neutral
   ✓ Ideal Voltage reading should be less than 3V

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II. Choose the proper size of cabinet/enclosure with door
   Improper airflow due to limited space in the network cabinet leads to switch overheating, especially for industrial applications.

Benefits of a Bigger Cabinet 
✓ Ample air space
✓ Good airflow
✓ Quicker heat dissipation
✓ Better switch performance

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III. Correct DIN-Rail Installation and Power Inserting

1. Installation Flow Chart

 

2. Step 1: Attach the DIN-Rail to the back of the cabinet/enclosure

 

3. Step 2: Grounding Installation
   ✓ Use a screwdriver to loosen the grounding on the switch
   ✓ Attached the grounding lug to the M4 screw grounding receiver
   ✓ Tighten the screws to prevent the lug from loosening
   ✓ Place the switch on the DIN-Rail then push the front of the switch toward the mounting surface until it snaps into place with a click sound
   ✓ Connect grounding wire to the grounding screw on cabinet/enclosure

 

4. Step 3: Wiring the cable and power on the switches

a. Wiring the cable
    ✓ Use a flat-head screwdriver to loosen the wire-clamp screws
    ✓ Insert the corresponding positive/negative into the contact receivers on the terminal block.
    ✓ Tighten the wire-clamp screws to prevent the lugs from loosening

b. Power inserting and power on the switches
    ✓ Using voltage measure to make sure the input voltage is within the range of proper power input specification.
    ✓ Assemble the positive and negative electric wire to the terminal block correctly as in “Wiring the cable”
    ✓ Using voltage measure to make sure the input voltage is in the operation range
    ✓ Turn off power source
    ✓ Plug the terminal block into the switch completely.
    ✓ Then turn on the power source
    ✓ After self-diagnosis, check the LED status on the switch to make sure it already successfully operated.

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IV. Use two available power source to prevent network interruptio

This issue is related to Monitoring tool (3rd party application)

When your switch ports are flooding with broadcast, multi-cast, and unknown uni-cast (also referred to as Destination Look-up Failure or DLF) packets and you want to block the ports.

No. Only one feature can be enabled at a time.

Storm Control feature only limits or restricts the packets flooding the port as configured.  To block the port, enable the Traffic Monitoring feature.

A management VLAN is used to establish an IP connection to the switch from a workstation connected to a port in the VLAN and manage the switch from a remote location using protocols such as Telnet, SSH, SNMP, etc.  By default, the active management VLAN is VLAN1, but you can designate any VLAN as management VLAN.  Only one management VLAN can be active at a time.

      Benefits

• Manage the network from a single remote location
• Better security, control and administration of network
• Improves network usage and efficiency
• Reduces administrative costs 

Downlink ports.

Port status – Blocked
LED status – Off