Q&A
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 6 of 7
Q.
Which Cisco Enhanced EtherSwitch Service Modules provide PoE?
A.
Table 5 lists the service modules that support PoE.
Table 7.
Service Modules that Support PoE
Model
Fast Ethernet Ports
Gigabit Ethernet Ports
SFP
Layer 2
Layer 2/L3
PoE
Width
SM-ES2-16-P
15
1
X
Yes
single
SM-ES2-24
23
1
X
Single
SM-ES2-24-P
23
1
X
Yes
Single
SM-D-ES2-48
48
2
X
Double
SM-ES3-16-P
15
1
X
Yes
Single
SM-ES3-16G-P
16
X
Yes
Single
SM-ES3-24-P
23
1
X
Yes
Single
SM-ES3G-24-P
24
X
Yes
Single
SM-D-ES3-48-P
48
2
X
Double
SM-D-ES3G-48-P
48
2
X
Yes
Double
Q.
What is Cisco Enhanced PoE (ePoE)?
A.
Cisco Enhanced PoE supports up to 20 watts per port.
Q.
Is Cisco ePoE 802.3at-compliant?
A.
No, ePoE is not part of the standard yet.
Q.
Can the Cisco Enhanced EtherSwitch Service Modules provide high-power IEEE 802.3af-compliant
power to all ports?
A.
The IEEE 802.3af PoE supports up to 15.4 watts per port and Cisco ePoE supports up to 20 watts per port. The
amount of power available to the enhanced Ethernet ports is limited by the power-supply capabilities of the
hosting platform. Table 6 shows the maximum power available per platform for PoE applications.
Table 8.
Power per Platform for PoE Applications
Integrated Services Router
Platforms
PoE (watts)
PoE Boost from Redundant
Power Supply (RPS) (watts)
Dual AC-IP PSU (watts)
Cisco 2911
200W
750
Cisco 2921
280W
750
Cisco 2951
370W
750
Cisco 3925
520
1040
Cisco 3945
520
1040
Q.
Can I deploy both PoE and non-PoE Cisco Enhanced EtherSwitch modules together in the same
chassis?
A.
Yes, and you can deploy them in any slot.
Q.
Can I upgrade the non-PoE models to support PoE?
A.
No, the Cisco Enhanced EtherSwitch Service Modules do not support a field upgrade to add PoE. You must
order the modules in the correct configuration.
Q.
What are the features of the Cisco Enhanced EtherSwitch Service Modules?
A.
The Cisco Enhanced EtherSwitch Service Modules share common software and features with the Cisco Catalyst
3560-E (ES3) and Catalyst 2960 (ES2) desktop switches.
