SwitchBlade x8106 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section I: Hardware Overview
69
Power Budgeting
The power for PoE on the ports on the AT-SBx81GP24 Line Card is
provided by the AT-SBxPWRPOE1 Power Supply. It can provide up to
1200 watts of power for powered devices. You may install up to two power
supplies in the chassis for a total of 2400 watts for the powered devices.
The number of powered devices the chassis can support at one time
depends on the number of AT-SBxPWRPOE1 Power Supplies in the
chassis and the power requirements of the powered devices in your
network. Table 22 lists the maximum number of powered devices by class,
for one or two power supplies. The numbers assume that the powered
devices require the maximum amount of power for their classes.
Note
The maximum number of PoE ports in the SwitchBlade x8106
Switch is 96 ports.
PoE Wiring
The IEEE 802.3af and 802.3at standards define two methods for
delivering power to powered devices over the four pairs of strands that
comprise a standard Ethernet twisted-pair cable. The methods are called
Alternatives A and B. In Alternative A, power is supplied to powered
devices on strands 1, 2, 3, and 6, which are the same strands that carry
the 10/100Base-TX network traffic. In Alternative B, power is delivered on
strands 4, 5, 7, and 8. These are the unused strands.
Note
1000BASE-T cables carry the network traffic on all eight strands of
the Ethernet cable.
The PoE implementation on the AT-SBx81GP24 Line Card is Alternative
A. Power is transmitted on strands 1, 2, 3, and 6. Thus, the line card can
Table 22. Maximum Number of Powered Devices
Class
Maximum Number of
Ports with
One PoE PSU
(1200 W)
Maximum Number of
Ports with
Two PoE PSU’s
(2400 W)
0
77
96
1
96
96
2
96
96
3
77
96
4
40
80
Содержание AT-SB*81CFC960
Страница 20: ...20...
Страница 34: ...Chapter 1 Chassis and Power Supplies 34 Section I Hardware Overview...
Страница 94: ...Chapter 3 AT SBx81CFC960 Controller Fabric Card 94 Section I Hardware Overview...
Страница 96: ...96...
Страница 142: ...Chapter 6 Installing the Power Supplies 142 Section II Installing the Chassis...
Страница 166: ...Chapter 7 Installing the AT SBx81CFC960 Controller and Ethernet Line Cards 166 Section II Installing the Chassis...
Страница 230: ...Chapter 10 Powering On the Chassis 230 Section II Installing the Chassis...
Страница 254: ...Chapter 12 Troubleshooting 254 Section II Installing the Chassis...
Страница 298: ...Chapter 14 Upgrading the Controller Fabric Card 298 Section II Installing the Chassis...
Страница 300: ...300...
Страница 314: ...Chapter 15 VCStack Plus Overview 314 Section III Building a Stack with VCStack Plus...
Страница 356: ...Appendix A Technical Specifications 356...