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Data Sheet

Advanced PoE Support

The new Cisco EtherSwitch service modules (NME-16ES-1G-P, NME-X-23ES-1G-P, NME-XD-

24ES-1S-P, and NME-XD-48ES-2S-P only) are capable of providing both Cisco pre-standard

and IEEE 802.3af Power over Ethernet (PoE) support when inserted in Cisco 2800 Series or 3800

Series Integrated Services Routers (requires an upgrade to an AC-IP power supply). 802.3af is the

IEEE standard for delivering power to Ethernet ports. The new Cisco EtherSwitch service modules

offer many benefits in regards to PoE support (Table 3) and can be used to power devices such as

access points, IP phones, and other powered devices. Cisco EtherSwitch service modules are the

first network modules offered by Cisco that are capable of supporting 802.3af-compliant devices.

The type of PoE that is delivered to the Ethernet ports differs by platform. Table 3 details PoE

(Cisco pre-standard and 802.3af) support on a platform and module combination basis.

Table 3. PoE Features and Benefits

Feature Benefit

PoE Support

Compliant with

IEEE 802.3af

●

When used in a host router platform that is capable of providing 802.3af support such as

the Cisco 2800 Series or 3800 Series (requires AC-IP power supply), the PoE-capable

Cisco EtherSwitch service module can provide PoE to ports in compliance with the IEEE

802.3af specification (not available on Cisco 2691 or 3700 Series routers).

●

Provides up to 15W of power per port; total PoE delivery capability varies by the router

host (Table 9).

●

Can be used to power any IEEE 802.3af-compliant devices such as IP phones, access

points, card readers, and Web cameras.

Cisco Pre-standard

PoE Support

●

Can support Cisco devices based on Cisco's pre-standard implementation of PoE

●

NME-16ES-1G-P can be used with routers that are not capable of supporting IEEE

802.3af, such as Cisco 3700 Series routers, to provide Cisco pre-standard PoE (not

available on Cisco 2691 routers).

Superior Redundancy

for Fault Backup

●

The Cisco RPS 2300 Redundant Power Supply can provide redundancy for the internal

power supply on the Cisco 2800 Series or 3800 Series routers, for the PoE provided by the

EtherSwitch service modules, and for up to six other Cisco networking devices.

●

Cisco 3845 and 3745 routers have dual internal power supply options that can be used to

provide redundancy for the internal power supply of the routers and for in the PoE provided

by the EtherSwitch service modules.

Cisco StackWise Technology Support

The new NME-XD-24-1S-P Cisco EtherSwitch service module provides two Cisco StackWise

connectors for interconnection with Cisco Catalyst 3750 and 3750-E Series switches. The

Cisco StackWise architecture (Table 4) is a stacking architecture that is optimized for Gigabit

Ethernet and designed to respond to stack additions and deletions, as well as redeployment while

maintaining constant performance. Cisco StackWise technology unites individual Cisco Catalyst

3750 Series switches with the NME-XD-24-1S-P module into a single logical unit, using special

stack-interconnect cables and stacking software. The stack behaves as a single switching unit

that is managed by a master switch elected from one of the member switches. The master switch

automatically creates and updates all of the switching and optional routing tables. A working stack

can accept new members or delete old ones without service interruption.

Integrating Cisco StackWise technology into a Cisco integrated services router allows network

managers to manage an entire stack of switches from the router CLI or with Cisco Network

Assistant software, lowering operational costs by streamlining the checking of software versions,

loading of global configuration parameters, and simplifying deployment of additional ports. For

rapidly growing businesses, Cisco StackWise technology allows customers to pay for only what

they need, and to easily add new switches to the stack as additional ports are needed.