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Categories (x) > Networking > Switches > Commercial/Office Grade > 48- to 52-Port (x)

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  • Manual... 
  • Gigabit Ethernet Managed Switch User Manual
    User Manual for the LGB5028A and LGB5052A (Version 1)
 
  • Firmware... 
  • 48-Port PoE+ Gigabit Managed Switch Eco
    Firmware for the LPB2848A (Version v1.58)
 

Product Data Sheets (pdf)...Gigabit L3 Managed Switches with 10G Uplinks

  • Manual... 
  • Gigabit Managed Switch CLI Guide
    CLI Guide for the LGB1108A, LGB1126A, and LGB1148A (Version 1)
 

Black Box Explains...Layer 3 switching.

In the last decade, network topologies have typically featured routers along with hubs or switches. The hub or switch acts as a central wiring point for LAN segments while the... more/see it nowrouter takes care of higher-level functions such as protocol translation, traffic between LAN segments, and wide-area access.

Layer 3 switching, which combines Layer 2 switching and Layer 3 IP routing, provides a more cost-effective way of setting up LANs by incorporating switching and routing into one device. While a traditional Layer 2 switch simply sends data along without examining it, a Layer 3 switch incorporates some features of a router in that it examines data packets before sending them on their way. The integration of switching and routing in a Layer 3 switch takes advantage of the speed of a switch and the intelligence of a router in one economical package.

There are two basic types of Layer 3 switching: packet-by-packet Layer 3 (PPL3) and cut-through Layer 3.

PPL3 switches are technically routers in that they examine all packets before forwarding them to their destinations. They achieve top speed by running protocols such as OSPF (Open Shortest Path First) and by using cache routing tables. Because these switches understand and take advantage of network topology, they can blow the doors off traditional routers with speeds of more than 7,000,000 (that’s seven million!) packets per second.

Cut-through Layer 3 switching relies on a shortcut for top speed. Cut-through Layer 3 switches, rather than examining every packet, examine only the first in a series to determine its destination. Once the destination is known, the data flow is switched at Layer 2 to achieve high speeds. collapse

  • Firmware... 
  • 48-Port Gigabit Managed Switch Firmware
    Firmware for the LGB1148A (Version v2.00)
 
  • Manual... 
  • Gigabit L3 Managed Switch with 10G Uplinks Accessories Manual
    Accessories Manual for the LGB6026A, LGB6050A, LGB6001C, LGB6000SC-001, & LGB6000SC-004 (Version 1)
 
  • Application Note... 
  • Black Box Multicast Video-over-IP Solution
    MediaCento IPX and LGB Series Ethernet Switches (Version 1)
 
  • Firmware... 
  • 52-Port Gigabit Ethernet Managed Switch
    Firmware for the LGB5052A (Version v2.00)
 

Product Data Sheets (pdf)...10-, 26-, and 48-Port Gigabit Managed Switches

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