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Scalable Gigabit Modular Platform |
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Delivers Flexible Mixtures of Media and Bandwidth |
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Intelligent Layer 3 Network Control |
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| What is a Layer 3 Switch? |
| Layer 3 switches have optimized hardware to pass data as fast as Layer 2 switches, yet they use the IP address for making a switching decision at Layer 3, just like a router. The 802.1Q VLAN of a Layer 2 switch allows network operators to configure and maintain the network more effectively, but cross VLAN communication still relies on traditional Layer 3 routers. Both routers and Layer 3 switches use a routing protocol and routing table to determine the best path. However, compared to router that is usually software-based, Layer 3 switches are relatively faster and less expensive due to built-in switching hardware with optimized chips and full-wire speed IP frame forwarding performance suitable for VLAN interconnection. Moxas Layer 3 switch can be used to partition a large-scale LAN into multiple subnets for better network performance. |
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| Static Routing |
| Instead of using a Layer 2 Ethernet switch MAC table, the EDS-828 series has a built-in IP routing table to support forwarding IP frames. Network administrators need to configure and maintain this IP routing table totally manually. Any change in the network topology will also require the network administrator to reconfigure the routing table. |
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| Routing Information Protocol (RIP) |
| In addition to static routing, the EDS-828 has a built-in IP routing table that can be set up and updated dynamically by routing protocol. RIP is an often used routing protocol that uses the Bellman-Ford algorithm and hop count measurement to determine how packets should be routed from one network to another. |
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| Open Shortest Path First (OSPF) |
| The EDS-828 series also supports OSPF, which uses Link State instead of hop count to determine the network route. OSPF is more complicated than RIP. However, compared to RIP, OSPF has faster network convergence and less network traffic. Both RIP and OSPF are usually referred to as Interior Gateway Protocols (IGP). |
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| Static versus Dynamic |
| The EDS-828 built-in IP routing table can be updated and maintained both statically and dynamically. If the network is small and fixed, the network administrator may configure the IP routing table manually. However, any network topology change will require the network administrator to reconfigure the settings manually. If the network is extended or the network topology is changed frequently, using dynamic routing can efficiently enhance network stability and reduce the time it takes to effect network convergence. Dynamic routing protocol allows devices to detect and respond to network changes automatically. In this case, network administrators do not need to reconfigure the settings after the network changes. |
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