x530L Series Installation Guide for Virtual Chassis Stacking
45
The lowest priority level is Low. This is the default setting. Ports set to this
level only receive power if all of the ports assigned to the other two levels
are already receiving power. As with the other levels, if there is not enough
power to support all of the ports set to the Low priority level, power is
provided to the ports based on port number, in ascending order.
Power allocation is dynamic. Ports supplying power to powered devices
can cease power transmission if the switch power budget is at maximum
usage and new powered devices, connected to ports with higher priorities
become active.
Wiring
Implementation
The IEEE 802.3af standard defines two methods for delivering DC power
over twisted pair cable by a switch to powered devices. These methods
are known as Modes A and B, and identify the individual wires that carry
the DC power within the cable from the switch to powered devices.
Twisted pair cabling typically consists of eight wires. With 100Base-TX
devices, the wires connected to pins 1, 2, 3, and 6 on the RJ-45
connectors carry the network traffic while the wires connected to pins 4, 5,
7, and 8 are unused. At higher speeds, all eight wires are used to carry
network data.
It takes four wires to deliver DC power to a powered device. With Mode A,
power is delivered on pins 1, 2, 3, and 6. These are the same pins in
10Base-T and 100Base-TX devices that carry the network data. With
Mode B, power is provided over the spare wires.
The x530L-28GPX and x530L-52GPX switches support powered device
Classes 0 to 4 up to 30W, using Mode A.
The wiring modes for the x530L-10GHXm and x530L-18GHXm switches
are as follows:
Classes 0-4 (Type 1 or 2 up to 30W): Mode A (MDI-x)
Classes 5-6 (Type 3 up to 45W/60W): Mode A (MDI-x) plus Mode
B (MDI-x, MDI)
Classes 7-8 (Type 4 up to 75W/90W): Mode A (MDI-x) plus Mode
B (MDI-x, MDI)
Powered devices of Classes 0 to 4 that comply with the IEEE 802.3af
standard are required to support both Modes A and B. Legacy devices that
do not comply with the standard will work with the switch if they are
powered on pins 1, 2, 3, and 6.
Содержание x530L Series
Страница 8: ...Contents 8 ...
Страница 12: ...Tables 12 ...
Страница 16: ...Preface 16 ...
Страница 56: ...Chapter 1 Overview 56 ...
Страница 60: ...Chapter 2 Virtual Chassis Stacking 60 When using a multi speed port as a stack port it supports 1 to 8 links ...
Страница 88: ...Chapter 2 Virtual Chassis Stacking 88 ...
Страница 140: ...Chapter 6 Installing the Switch on a Wall 140 ...
Страница 202: ...Chapter 8 Building the Stack Trunk with 5Gbps Multi Speed Ports 202 ...
Страница 210: ...Chapter 9 Cabling the Networking Ports 210 ...
Страница 228: ...Appendix A Technical Specifications 228 ...