Specification Sheet

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Feature
Description
Discovery
Bonjour
The switch advertises itself using the Bonjour protocol
Link Layer Discovery Protocol
(LLDP) (802.1ab) with LLDP-
MED extensions
Link Layer Discovery Protocol (LLDP) allows the switch to advertise its identification, configuration, and
capabilities to neighboring devices that store the data in a MIB. LLDP-MED is an enhancement to LLDP that
adds the extensions needed for IP phones
Cisco Discovery Protocol
The switch advertises itself using the Cisco Discovery Protocol. It also learns the connected device and its
characteristics using Cisco Discovery Protocol
Product specifications
802.3at PoE+ and 802.3af PoE
delivered over any of the RJ-45
ports within the listed power
budgets
The following switches support 802.3at PoE+, 802.3af, and Cisco prestandard (legacy) PoE. Maximum
power of 30.0W to any 10/100 or Gigabit Ethernet port, until the PoE budget for the switch is reached. The
total power available for PoE per switch is as follows:
Model
Power dedicated to PoE
Number of ports that support PoE
SF250-24P
185W
24
SF250-48HP
195W
48
SG250-08HP
45W
8
SG250-10P
62W
8
SG250-26HP
100W
24
SG250-26P
195W
24
SG250-50HP
192W
48
SG250-50P
375W
48
SG250X-24P
195W
24
SG250X-48P
382W
48
PoE Powered Device (PD) and
PoE pass-through
Besides AC power, select compact switch models can work as PoE Powered Device (PD) and be powered
by PoE switches connected to the uplink ports. The switch can also pass through the power to downstream
PoE end devices if required
Maximum of 60W can be drawn per uplink port if the peer PoE switch supports 60W PoE. When multiple
uplink ports are connected to PoE switches, the power drawn from these ports is combined
When AC power is connected and functioning correctly, it is preferred over PoE power. The PoE power can
function as a backup to the AC power source or be used as the sole power source for the switch
Model
Power option
Available PoE pass-
through power (W)
Can switch be powered with
uplinks?
SG250-08
1 x PoE uplink
1 x PoE+ uplink
AC Power
N/A
N/A
N/A
Yes
Yes
Yes
SG250-10P
1 x PoE uplink
2 x PoE uplink
1 x PoE+ uplink
2 x PoE+ uplink
1 x 60W PoE uplink
2 x 60W PoE uplink
AC Power
0W
0W
0W
22W
22W
50W
62W
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Power consumption
(worst case)
Model
Green power (mode)
System power
consumption
Power consumption
(with PoE)
Heat dissipation
(BTU/hr)
SF250-24
EEE, Energy Detect
110V=10.6W
220V=10.9W
–
37.19
SF250-24P
EEE, Energy Detect
110V=29.2W
220V=28.3W
110V=238W
220V=230W
812.09
SF250-48
EEE, Energy Detect
110V=23.4W
220V=24.2W
–
82.57
SF250-48HP
EEE, Energy Detect
110V=43.1W
220V=44.3W
110V=265.2W
220V=255.8W
904.90