HP ProCurve 600, Planning And Implementation Manual

Page: 100 / 168

7-4
Planning and Implementation for the 2910al PoE+ Switches
Planning Your PoE Configuration
P
lann
ing an
d
Im
p
lem
en
ta
ti
on f
o
r t
he
2910a
l PoE+
Switch
e
s
ProCurve 2910al-48G-PoE+ Configuration
PoE+ power requirements are figured differently for the 2910al-48G-PoE+
switch, see PoE+ Power on
page 2-15 . The table in this example configuration
contains entries that show the PoE+ power available for the 2910al-48G-PoE+
switch.
In the default configuration PoE+ power priority is determined by port
number, with the lowest numbered port (port 1) having the highest priority,
and the highest numbered port (port 48) having the lowest priority.
N o t e
It is the ports configured with the highest priority of either bank (1-24 or
25-48) that will receive PoE+ power first. For example, if the highest priority
ports have been re-configured to be 23, 24 and 47, 48, then they will receive
PoE+ power before the lower priority ports.
Figure 7-3. Example of a 2910al-48G-PoE+ Switch
For example, the switch starts with 382 watts. It takes 360.0 watts to fully
provision 12 ports at 30 watts per port (plus 6 watts to account for load
fluctuations), leaving 22 watts to be returned to the pool of available watts.
Since a port requires 33 watts to power up a PoE+ device, there is not enough
available power to power another device.
Power
Fault
Locator
Console
LED
Mode
Clear Reset
PoE+ Integrated 10/100/1000Base-T Ports (1 - 48T) — Ports are Auto-MDIX
Test
Tmp
Status
Dual-Personality Ports: 10/100/1000-T (T) or SFP (S)
!
Use only one (T or S) f
or eac
h P
or
t
PoE
Fan
45
S
47
S
46 S 48 S
*
Spd mode: off=10 Mbps, 2 flash=100 Mbps, on=1 Gbps, 3 flash=10 Gbps
FDx
Spd
PoE
Act
*
38 40
43 41 39 37
12 10 8 6 4 2
11 9 7 5 3
1
42 44
Link Mode Link Mode
Link Mode
47
T
45
T
46 T 48 T Link Mode
Status of the Back Mdl RPS EPS
ProCurve Switch
2910bl-48G-PoE
J9148A Link Mode
Link Mode 24 22 20 18 16 14
23 21 19 17 15 13
Link Mode
Link Mode 36 34 32 30 28 26
35 33 31 29 27 25
Link Mode
Link Mode
Usr
PoE+
All 24 ports can receive up to 15.4
watts of PoE power
or
48 ports can receive up to 7.0
watts of PoE power
12 ports can receive up to 30
watts of PoE+ power
or
Source of
Power
Watts
Available
# of Ports Powered and
Average watts/Port
Redundant # of Ports
Powered and Average watts/
Port
Internal PoE+
Power
Supply 382 12 @ average 30 W each
24 @ average 15.4 W each
48 @ average 7.5 W each
48 @ average 4.0 W each None