Description
Product Overview
The Dell PowerEdge 1855 is a server blade enclosure that is designed to hold up to ten server blades. It was introduced by Dell in 2004 and was aimed at providing a compact and high-density solution for data centers. One of the key components of the PowerEdge 1855 enclosure is the HJ574 Gigabit Ethernet Pass Through Switch Module. In this article, we will explain what this module is, how it works, and its importance in the PowerEdge 1855 enclosure.
Specification of Pass Through Switch Module
The HJ574 module is a switch that allows multiple server blades to connect to a network using Gigabit Ethernet technology. It is a passive switch, which means it does not require any power or configuration to operate. The HJ574 module is designed to be installed in the back of the PowerEdge 1855 enclosure and provides a total of four Gigabit Ethernet ports per module. This allows each server blade to have access to one or two Ethernet ports depending on the configuration.
Working Process of Gigabit Ethernet Pass Through Switch
The HJ574 module works by providing a direct connection between each server blade and the network switch. When a server blade is inserted into the PowerEdge 1855 enclosure, its Ethernet ports are connected to the HJ574 module via internal cabling. The HJ574 module then passes the Ethernet traffic from each blade to the network switch without modifying it in any way. This means that each blade has direct access to the network without any additional latency or overhead introduced by the switch.
The HJ574 module also supports jumbo frames, which are Ethernet frames that are larger than the standard 1500-byte frames. Jumbo frames can improve network performance by reducing the number of frames that need to be transmitted. However, not all network switches support jumbo frames, so it is important to verify compatibility before enabling this feature.
Importance of Gigabit Ethernet Switch
The HJ574 module is an important component of the PowerEdge 1855 enclosure because it allows each server blade to have direct access to the network. This is important for several reasons. First, it reduces network latency and overhead because each blade does not have to go through an additional switch. Second, it simplifies network configuration because each blade appears as a separate device on the network. This can make it easier to troubleshoot network issues and manage network traffic.
Another important feature of the HJ574 module is its support for Link Aggregation Control Protocol (LACP). LACP allows multiple Ethernet links to be aggregated into a single logical link, which can increase bandwidth and provide redundancy in case one link fails. The HJ574 module supports LACP in both active and passive modes, which allows it to be used with a wide range of network switches.
Finally, the HJ574 Dell PowerEdge 1855 Gigabit Ethernet Pass Through Switch Module is a critical component of the PowerEdge 1855 enclosure. It allows each server blade to have direct access to the network, reducing latency and simplifying network configuration. The HJ574 module also supports jumbo frames and LACP, which can further improve network performance and provide redundancy. If you are considering deploying a PowerEdge 1855 enclosure, it is important to understand the role of the HJ574 module and how it can benefit your network infrastructure.
Main Specification about the Dell HJ574
- Manufacturer: Dell
- Part Number or SKU# HJ574
- Device Type: Switch Module
Technical Information
- Total Number of Ports : 10
- Form Factor : Rack-Mountable
- Compatible Rack Unit : 1U
- Data Link Protocol : Gigabit Ethernet
- Network Technology : 10/100/1000
Expansion / Connectivity
- Ports Type : RJ-45
