The JetNet 6524G is a 19-inch Gigabit Stackable Layer 3 Managed Switch, equipped with 24 10/100/1000 Base-TX ports including 4 Gigabit SFP combo ports delivering maximum throughput and flexibility for highdensity and ultra high-speed connection. With stacking cable installation, up to 8 units can be stacked together, allowing building a single-IP manageable device and simultaneously providing 40G backplane across full duplex stacking links. The flexible interface design allows JetNet 6524G to provide up to 192 Gigabit ports per stack and 384G bandwidth for building intelligent largescale networks.
In addition to the 90-264VAC power-based JetNet 6524G model, Korenix provides the JetNet 6524GDC series, which support 24V or 48V power inputs and feature a FAN-less design with -40~65°C wide operating temperature for severe industrial applications.
Easy Stack Management
The simplified stack management interface of JetNet 6524G allows users to manage up to 192 ports of the switches through single console interface or remotely manage them through single IP address. Besides, administrators can benefit from the stacking interface by easily configuring the precedence of each stack member. By assigning different precedence to different stack members, users can choose the management (Master) unit of the stack. If a stack member's precedence is assigned to be disabled, this stack member will always be a slave unit.
Triple Layer 3 Routing (IP, VLAN and Multicast routing)
The JetNet 6524G IP routing layer contains the IP forwarding layer, Address Resolution Protocol (ARP) mapping layer and Routing Tables. With IP forwarding table, the JetNet 6524G provides wire speed IP and VLAN inter-routing. A single JetNet 6524G allows users to configure multiple IP subnets and assign them to the physical interface. The routing table can be updated according to the routing information defined by configured static route or learnt by dynamic Routing Protocols.
The dynamic Routing Protocols supported by JetNet 6524G are RIPv1, v2, OSPFv1 and V2. Aiming to route multicast streams such as movies, videos, industrial automationstreams through different subnets, in addition to IP and VLAN routing, the dynamic multicast routing protocols, such as PIM-DM and PIM-SM, DVMRP, IGMP v1/v2/v3, are needed. Korenix JetNet 6524G outstands from other layer 3 switches by its multicast routing feature. With IGMP snooping and IGMP router port selection protocols, the JetNet 6524G acts as an access level switch or aggregated switch, so that the clients can be divided into different subnets for wire speed routing and for exchanging routing information with other L3 routers/switches.
What is Layer 3 Switch?
Layer 3 means the 3rd level of the OSI 7 layers. It is known as IP layer. Layer 3 switch is also known as Multi-Layer switch which includes the wire-speed layer 2 MAC switching and layer 3 IP routing capabilities.
Routing is the process of moving packets through an internetwork, such as the Internet. To Route traffic, a router or layer 3 switch needs to know the destination IP address, the sources IP it can learn from, the possible routes. Besides, it should find the best route, maintain and verify routing information. If the next hop address is known or assigned by IT manager or service provider, the static route can direct the correct routing request to the connected interface. If not, the dynamic routing protocol is needed.
The dynamic routing protocol includes unicast routing and multicast routing protocols. The unicast routing protocol includes hop based or distance vector based protocols. RIP is the typical hop based protocol, where the less hops path is always the best route. OSPF is a typical distance vector based protocol, where the lowest cost is the best route path. To route multicast services, like movies, videos, industrial automation streams, the multicast routing and related protocols are needed. The DVMRP, PIM-DM, PIM-SM are supported by JetNet 6524G series.
Advantage of the Stack Management
The Stack Management feature provides abundant advantages for management. It simplifies the management interface, reduces the number of IP addresses needed in a network, uses a single out-ofband console interface to control whole stack as one switch and single configuration file.
When the New unit joins or leaves, and/or a stack cable accidentally disconnects, the existed traffic transmission will not face any topology recovery problem. Only when the master switch of the stack fails, the stack will be recovered within a short time.
JetNet 6524G is capable of supporting up to 8 switches per stack with maximum 192 gigabit ports per stack. The JetNet 6524G equips dual 10G interfaces as the backplane between the units. As a result, the 40G backplane decreases the bottleneck effects when the inter-switching traffic is heavy. With the high volume stacking capability, secured stack cable, 10G stack backplane, users can easily and flexible expand the gigabit port volume without changing environment.
VRRP (Virtual Router Redundancy Protocol)
When the source host and the destination host are not on the same segment/subnet, the source host sends the data to the default gateway first. The hosts must have their own IP, subnet mask and default gateway. The VRRP (Virtual Router Redundancy Protocol) is also known as default gateway redundancy.
With VRRP, the hosts can continuously direct traffic to the default gateway without changing default gateway configuration. Once the VRRP master failure happens, the backup VRRP router activates immediately. The TCP connection will not be terminated within short failover time, the hosts will not aware the default gateway failure. The VRRP is a standard protocol and ensures the high reliability of the environment.