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Featured Products
- NEW: Korenix launches JetNet 3008 V3 series with Heavy Industry EMC cerified design >>
- NEW: JetNet 5012G switches support IP DSCP Remarking for QoS prioritization >>
- NEW: Multiple Event Relay Alarm is launched in JetNet 4508 V2 series for enhanced network control >>
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| Guaranteeing Advanced Data Prioritization and Control through the IP DSCP Remarking of JetNet 5012G IP Surveillance 8+4G Giga Managed Switch...read more |
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Korenix launches JetNet 3008 V3 series 8-port Fast Ethernet Copper and Fiber switches with Enhanced Heavy Industry EMC certified design for Severe Field Site Networking!
JetNet 3008 V3 / 3008f V3  |
Korenix launches the superior V3 model of its JetNet 3008 / 3008f 8-port Fast Ethernet Copper and Fiber switches with an upgraded and IEC/EN 61000-6-2 / 6-4 heavy industry certified design, electromagnetic susceptibility, 10~60VDC redundant power inputs and up to -40~75oC wide operating temperature range to best fit in heavy industrial field site applications.
Combining the 2.0Gbps high performance switching engine, broadcast storm filtering and QoS packet forwarding functions, the copper and fiber models of JetNet 3008 V3 series entry-level switches guarantee excellent data transfer performance in flexible network deployments with up to 30KM extended distances. All of these features make the compact rugged switches the best fitted solutions for roads and traffic control systems, mines and factory automation systems, etc. |
Key distinguishing features of the new JetNet 3008 V3 series are:
> Flexible distance uplink transmission via fiber / copper interfaces
JetNet 3008 V3 series are entry-level switches designed with 8 Fast Ethernet ports with 2.0Gbps switch fabric for providing excellent data transmission without any data loss. Depending on their application distance requirements users can choose to use the JetNet 3008 V3 or JetNet 3008f V3 equipped with 6 Fast Ethernet plus 2 Copper or 2 Fiber uplink ports. The JetNet 3008f V3 fiber switch model further comes with Multi-mode and Single-mode optical fiber ports for extending data transmission to 2KM and 30KM distances.
> Broadcast Storm Filtering & QoS for enhanced data transfer performance
JetNet 3008 V3 series are designed with broadcast storm filtering and flow control functions to ensure your data streaming without traffic congestion. Moreover, with the supported QoS users can prioritize data forwarding to achieve a better traffic streaming and higher network performance.
> Alarm Relay Output for system stability
To provide system stability and reliability the switches offer independent power and port event alarm features for instant maintenance by signaling users once a port/power break occurs.
> Redundant 10~60VDC Power Supply for stable operation
JetNet 3008 V3 series are designed with dual DC 10~60V power inputs for power redundancy ensuring a continuous power supply and preventing complete shutdown of your network. The auto polarity reverse function available on redundant power inputs enables the switches transmitting data even under poor DC power sourcing.
> Heavy industry certified design with Brilliant Electromagnetic Interference
To resist the harsh conditions available in heavy industrial field site applications, such as power substations, wind power plants, mines, factory floors, etc…. the JetNet 3008 V3 series are designed with high level of electromagnetic compatibility which even exceeds IEC / EN 61000-6-2 and 61000-6-4 heavy industry standards. The IP31 grade protected enclosure, and -25~70oC (JetNet 3008 V3), - 10~70oC (JetNet 3008f V3) operating temperature ranges further ensure switch’s stable performance under harsh conditions. For applications with more severe industrial conditions, Korenix offers the JetNet 3008-w V3 and JetNet 3008f-w V3 models with wide operating temperature range to resist under -40~75oC extremes.
The combination of enhanced network features and rugged specs make the JetNet 3008 V3 become your best entry-level networking solution in heavy industrial deployments.
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New IP DSCP Remarking is now launched in JetNet 5012G Industrial 8+4G Gigabit Managed Switch for enhanced QoS prioritization in factory and traffic control systems!
Korenix releases the new IP DSCP Remarking function in its 8+4G port Managed Gigabit switch’s v1.3a firmware to be highly compatible in Factory and Traffic Control networks, VoIP applications, etc, by providing users with advanced QoS prioritization and traffic identification.
JetNet 5012G |
The new feature allows the switch to use the advanced QoS to prioritize traffic forwarding levels in industrial networks. Compared to the earlier QoS prioritization available in the switch’s firmware, the IP DSCP Remarking allows users to reassign IP DSCP values and classify traffic in the network based on these values. As a result, it guarantees the QoS policy and can be controlled by the administrator.
More info is available in technical article; click here to view it! |
Korenix JetNet 5012G is an industrial Layer 2+ managed Ethernet switch with an exclusive design: in addition to the 8 Fast Ethernet ports it provides 2 Gigabit SFP and 2 Gigabit SFP combo ports for high-port connectivity and flexible extended uplink data transmission.
The 4 Gigabit ports design on JetNet 5012G is more convenient and widely required than 3 gigabit ports design as it ensures higher throughput within one switch box. JetNet 5012G supports Korenix patented MSR network redundancy and MultiRing technologies for connecting and forming dual gigabit rings and 4 100M rings. With the fast recovery time of less than 10milliseconds, it becomes possible to have non-stop data transmission without topology change. To be compatible with 3rd party devices when used in factory’s, substations or other existing network infrastructures, the switches also provide MSTP and RSTP network redundancy technologies for guaranteeing the reliability of the data transmission.
To enhance the performance of the streamed data, the JetNet 5012G supports various Layer 2+ advanced management, control and security functions, such as IGMP snooping, QoS, VLAN / Private VLAN / QinQ, DHCP Option 82, LACP, IP based Access Control List…etc. As an addition, the firmware of the switches also supports LLDP protocol which enables users to automatically find devices, visualize network topology and using JetView Pro, Korenix’s own patented NMS or the SNMP protocols easily and efficiently manage network from remote locations.
Last but not least, the UL508 certified fully managed switches are constructed in rugged aluminum enclosures with IP31 grade protection, -25~70oC (JetNet 5012G) as well as -40~70oC (JetNet 5012G-w) wide operating temperature ranges to endure heavy use under high/low temperature extremes of industrial applications.
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New Multiple Event Relay Alarm is launched in JetNet 4508 V2 series Heavy Industry EMC certified switches for Optimized Networking with Enhanced Control!
JetNet 4508 V2 / 4508f V2 |
Korenix integrates a new function, the Multiple Event Relay in its JetNet 4508 V2 series 8-port Managed Fast Ethernet Fiber / Copper Switches aiming to enhance the device control and optimize networks in heavy industrial applications.
Unlike the single event supported in the previous firmware version of the switches, with the new multiple event relay function users can now get alarms if multiple events occur, including power or port link changes, DI/Ring status changes, etc….. This, as a result, enables users to get better control of the switches by fast reacting to the situation changes for their future elimination.
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Korenix JetNet 4508 V2 series are field-level switches designed with outstanding management, control and security features and EN 50121-4, IEC 61373 Railway EMC as well as IEC 61000-6-2/ 61000-6-4 heavy industrial certified design to ensure reliable data transfer when used in harsh environmental applications.
Korenix offers two models, the JetNet 4508 V2 designed with 8 Fast Ethernet RJ45 ports and JetNet 4508f V2 with 6 Fast Ethernet plus 2 Fiber ports for up to 30KM distance uplink connection. Using the built-in watchdog timer, the switches provide operation stability and reliability in environments that are exposed to intense electromagnetic interference, temperature changes etc… Additionally, to ensure reliable operation in harsh environments, the switches, are constructed in rugged IP31 enclosures and have a wide operating temperature range: -25~70°C (JetNet 4508 V2), -10~70°C (JetNet 4508f V2) and -40~75°C (JetNet 4508-w/4508f-w V2).
Combining the MSTP and MSR (with <5ms recovery time) network redundancy technologies as well as the advanced management functions, including LLDP and JetView Pro for auto-device discovery and network management, Modbus TCP, QoS, IGMP snooping, VLAN, Private VLAN, etc… for high performance data streaming, into their intelligent ruggedized design, the JetNet 4508 V2 series become ideal fit for reliable and high quality data transmission in industrial deployments.
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ProTalk |
Guaranteeing Advanced Data Prioritization and Control through the IP DSCP Remarking of JetNet 5012G IP Surveillance 8+4G Giga Managed Switch! |
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When building network infrastructures today, it is essential to assure that the critical applications are guaranteed to get the network resources and data they need, despite varying network traffic load.
Quality of Service (QoS) Overview
Therefore, in industrial communication networks the Quality of Service is a highly important feature that should be provided in the equipment for giving different priorities to different packets generated from the application and users. For example, the control packet that is generated by the SCADA system in substation or factory automation environment is critical and must be forwarded by first priority.
Most industrial switches support QoS, for providing better communication performance through the prioritization. QoS has a simple operation mechanism: it ensures that the traffic takes precedence over non-controllable traffic, such as web surfing or file transfer. To prioritize traffic, managed switches use QoS tags in the packet header.
2 QoS Types are available; QoS can be marked in either the Layer 2 or the Layer 3 IP headers:
For the Layer 2 header, it is referred as the Class of Service (CoS) bits, where 3 bits are used to identify 8 levels of service. The bits are carried in the 802.1Q Tag along with the VLAN ID.
Figure 1: Layer 2 QoS
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For Layer 3, it is called the Differentiated Services Code Point (DSCP) value, where 6 bits are used to identify 64 levels of service. The bits are carried in the IP packets for packet classification purposes.
Figure 2: Layer 3 IP Header
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A Managed switch usually supports 4 physical queues. The below Figure 3 shows the JetNet Switch’s Queue Mapping, which highlights how the above 2 QoS types are prioritized:
Figure 3: JetNet Queue Mapping
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IP DSCP Remarking in JetNet 5012G managed switch
Normally, the DSCP value supported in the Layer 2 managed switch can only be mapped to the QoS table which is only for IP packet prioritizing. The JetNet 5012G is a layer 2+ switch which, in addition to IP packet prioritizing, can identify IP header and support IP DSCP Remarking. Marking a packet with an IP DSCP Remarking allows the switch to give new DSCP value in the IP header of the incoming packets through the switch. The administrator can then classify traffic based on an IP DSCP value and redefine the value for the outgoing traffic. With this function, it becomes flexible to adjust the QoS policy and prioritize the traffic forwarding levels in industrial network environments.
Steps:
1. Create QoS Policy Map
Switch(config)# policy-map control
2. Configuring the Class-Default Class Policy
Switch(config-pmap)#class class-default
Switch(config-pmap-c)#set ip dscp 63
3. Bind the Service Policy to ports
Switch(config)# interface fa1Switch(config-if)# service-policy input control |
Figure 4: IP DSCP Remarking Completed
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Advantage of IP DSCP Remarking
Once the IP packet is marked with DSCP value, the switch will follow the queue mapping configured by the switch’s UI in order to forward traffic. However, if the user assigned the value by itself with highest priority without administrator’s agreement, or if one of the switches is assigned with different DSCP value, the forwarding policy may be affected. This is not allowed by the system administrator and is risky while transmitting the critically important packets.
With the IP DSCP Remarking feature, the administrator can re-assign new DSCP value to the outgoing packets. Even the value of the packet, which is brought out by highest priority, can be changed to lowest, and the lowest priority value can be changed to highest. The IP DSCP Remarking feature can guarantee the QoS policy, and can be controlled well by the administrator.
To support the IP DSCP Remaking feature, it is required to have Layer 2+ chipset and software. Korenix JetNet 5012G is an 8-port Fast Ethernet plus 4-port Gigabit switch equipped with advanced layer 2+ chipset. The new V1.3a firmware of the JetNet 5012G is released with the support of the IP DSCP Remarking feature allowing more flexibility in prioritizing the data in industrial environments. With ruggedized design, outstanding interface capabilities as well as the advanced L2+ functions JetNet 5012G becomes a perfect solution to perform excellent data transfer for industrial communication networks.
For more advantages of IP DSCP remarking in JetNet 5012G series, click here! |
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