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.&ACisco Etherswitch Service ModulesOverviewQ. What are the Cisco EtherSwitch service modules?A. The Cisco EtherSwitch service modules are integrated switching modules for Cisco routers. These are the firstenhanced network modules (NME) that can take advantage of NME slots on Cisco integrated services routers.The EtherSwitch service modules expand the features of previous EtherSwitch network modules. These new modules are true service modules, meaning that they run an independent Cisco IOS Software image andprovide access through a reverse Telnet from the router. New features include the addition of IEEE 802.3afcompliant Power over Ethernet (PoE), local Layer 3 switching, support for Cisco Network Administrator and Cisco Emergency Responder, and on one module, Cisco StackWise interfaces.Q. How does the “reverse Telnet” connection work?A. Reverse Telnet uses an internal, virtual Telnet interface from the router to the module. The actual CLI commandis service-module g x/y session. This technique allows a console-type access to the module without an externalconsole connection.Q. What are the benefits of using the EtherSwitch service modules?A. Integrated switching and routing is a proven combination in the marketplace. It provides lower cost of ownershipand ease of management for those customers interested in a single solution. Cisco StackWise interfaces expand the integration to a stack of Cisco Catalyst 3750 and Catalyst 3750-E Series desktop switches, and theEtherSwitch service modules offer common software and features with those switches. Some specific benefitsinclude: Single management platform Single maintenance contract (one Cisco SMARTnet contract covers both router and switch) Shared redundant power supply with Cisco Redundant Power System 2300 (RPS 2300) Redundant physical links between the router and switch stack when using the Cisco StackWise connections Scalable, expandable switching densities that can grow with the needs of the customer Q. What platforms will support the EtherSwitch service modules?A. Table 1 shows platform support per module.Table 1.Platforms SupportedModule16 FE 1 GE NMEPlatform Cisco 2691 Multiservice Platform Cisco 3725 and 3745 Multiservice Access Routers Cisco 2811, 2821, and 2851 Integrated Services Routers Cisco 3825 and 3845 Integrated Services Routers Cisco 2911, 2921, and 2951 Integrated Services Routers Cisco 3925 and 3945 Integrated Services Routers23 FE 1 GE NME-X Cisco 2821 and 2851 Integrated Services Routers Cisco 3825 and 3845 Integrated Services Routers24 FE 1 SFP 2 StackWise NME-XD Cisco 2851 Integrated Services Router Cisco 3825 and 3845 Integrated Services Routers48 FE 2 SFP NME-XD Cisco 2851 Integrated Services Router Cisco 3825 and 3845 Integrated Services Routers 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.Page 1 of 1

Q&AQ. What is the difference between the EtherSwitch service modules and the existing EtherSwitch networkmodules and EtherSwitch high-speed WAN interface cards (HWICs)?A. The EtherSwitch service modules are full-featured desktop switches in a blade form factor] They offer commonfeatures and software with the industry-leading Cisco Catalyst 3750 and Catalyst 3750-E Series desktopswitches, with full integration into a Cisco router. Because the EtherSwitch service modules run a separateCisco IOS Software image, the same image as the Cisco Catalyst 3750 and Catalyst 3750-E Series desktopswitches, it will maintain real-time feature parity into the future. This means that customers will maintain twoCisco IOS Software images per router/switch module combination as well as individual configurations for thesecomponents. EtherSwitch service modules can provide inline power to IP phones, access points, and otherpowered devices, both those IEEE 802.3af compliant devices as well as Cisco pre-standard ones.The EtherSwitch network modules are based on the Cisco Catalyst 2950 chipset and have their configurationintegrated directly into the hosting router. This provides a single image and configuration file while forcing afeature lag from the compatible desktop switches. These modules can provide only Cisco pre-standard inlinepower to attached devices.The EtherSwitch HWICs provide low-density integrated switching to all platforms with a HWIC slot. Thisprovides a modular, integrated switching capability into those platforms, like the Cisco 1841/1941 and Cisco2801/2901 Integrated Services Routers, which cannot support a network module or NME slot. These cardsexpand the switching options for those platforms with an NME slot, offering customers the ability to incorporatelow-density switching or expand the switching capacity of the platform by a few ports. The EtherSwitch HWICsuse a commercial chipset but are based on the same Cisco IOS Software code as the EtherSwitch networkmodules. They support both 802.3af as well as Cisco pre-standard PoE implementations.Q. Why are the EtherSwitch service modules incompatible with the Cisco 2600/2600XM and Cisco 3600Series routers?A. The EtherSwitch service modules meet the NME standard and therefore draw more power than the Cisco2600/2600XM and Cisco 3600 platforms can provide to a network module slot. Many of these platforms havereached end of sale (EOS) and no additional development effort is being done on them. At this writing, the Cisco2600XM platforms have not reached end of sale, but cannot support the NMEs. The Cisco 2691 and Cisco 3700series platforms, while not able to fully support the NME standard, have enhanced power to their NM slots andcan support the new modules.Q. How will the NME EtherSwitch Service Module seat in an Integrated Services Router Generation 2 SeviceModule slot?A. When an NME EtherSwitch Service Module is installed in an Integrated Services Router Generation 2, themodule must use an adapter card in order to be seated in a Service Module slot. When doing so, theEtherSwitchEtherSwitch Service Module will not be able to benefit from the enhanced internal connectionoptions of a native Service Module. Instead the EtherSwitch Service Module will keep the same internalconnection characteristics as in the Cisco 2800/3800 series.Q. Should I expect the current EtherSwitch network modules and EtherSwitch HWICs to reach end of salesoon?A. No plan for end of sale of either of these cards currently exists. The EtherSwitch HWICs are new and provideswitching capabilities to those integrated service routers that do not have NME slots or do not need the featuresor density of the EtherSwitch service modules. The existing EtherSwitch network modules provide a switchingoption to the installed base of Cisco 2600/2600XM and Cisco 3600 Series routers and are supported in theCisco 2691, Cisco 3700 Series, and the Cisco Integrated Services Routers. The EtherSwitch network modulesoffer the option of an external power supply for those implementations that require it. 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.Page 2 of 11

Q&AQ. What are Small Form-Factor Pluggable (SFP) transceivers?A. SFPs transceivers provide Gigabit Ethernet connectivity from the EtherSwitch service modules to distributionlayer switches. They are functionally equivalent to gigabit interface converters (GBICs) but are smaller.Q. Which SFP transceivers are supported in the EtherSwitch service modules?A. The following SFP interfaces are supported in EtherSwitch service modules: GLC-LH-SM GLC-SX-MM 1000Base-SX-MM GLC-ZX-SM GLC-T GLC-GE-100FX CWDM-SFP-1470 CWDM-SFP-1610Q. Do the EtherSwitch service modules interoperate with SFP transceivers from other vendors?A. No, like other Cisco switches and routers, the EtherSwitch service modules do not interoperate with third-partySFP transceivers. The switch modules will shut down the port if an SFP transceiver is inserted that is not fromCisco.Q. Can the 1000BASE-T SFP transceiver support 10/100/1000 Mbps speeds?A. Yes, the copper SFP transceiver is supported at all three speeds.Q. What are the part numbers and details?A. Table 2 provides details per module.Table 2.Product DetailsModule Part NumberNME-16ES-1GPorts 16x10/100 RJ-45 1x10/100/1000 RJ-45Supported Platforms/ Number perPlatform Cisco 2691/1 Cisco 3725/2Maximum Powered Portsper Card– Cisco 3745/2 Cisco 2811/1 Cisco 2821/1 Cisco 2851/1 Cisco 3825/2 Cisco 3845/2 Cisco 2911/1 Cisco 2921/1 Cisco 2951/2 Cisco 3925/2 Cisco 3945/4NME-16ES-1G-P 16 x 10/100 RJ-45 1 x 10/100/1000 RJ-45 Cisco 3725/2 Cisco 3745/216 Cisco 2811/1 Cisco 2821/1 Cisco 2851/1 Cisco 3825/2 Cisco 3845/2 Cisco 2911/1 Cisco 2921/1 Cisco 2951/2 Cisco 3925/2 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.Page 3 of 11

Q&A Cisco 3945/4 23 x 10/100 RJ-45 1 x 10/100/1000 RJ-45NME-X-23ES-1G Cisco 2821/1 Cisco 2851/1– Cisco 3825/1 Cisco 3845/2NME-X-23ES-1G-P 23 x 10/100 RJ-45 1 x 10/100/1000 RJ-45 Cisco 2821/1 Cisco 2851/124 Cisco 3825/1 Cisco 3845/2NME-XD-24ES-1S-P*NME-XD-48ES-2S-P 24 x 10/100 RJ-45 1 x SFP-based Gigabit Ethernet Cisco 2851/1 Cisco 3825/1 2 StackWise interfaces Cisco 3845/1 48-10/100 RJ-45 2x SFP-based Gigabit Ethernet Cisco 2851/1 Cisco 3825/12448 Cisco 3845/2* Only one EtherSwitch service module is supported in a platform when using the NME-XD-24ES-1S-P.Q. How do I configure the EtherSwitch service modules?A. The configuration of EtherSwitch service modules is done in two parts. First, configure the router connection.This is an internal Gigabit Ethernet connection to the router backplane and represents the logical connectionbetween the switch modules and the router. Then issue the session command to connect to the command-lineinterface (CLI) of the EtherSwitch service module itself. At this point you may configure all of the ports andinterfaces on the module. For specific details on configuring selected switch features, see the Cisco IOSSoftware 12.2(25)EZ release notes. You can also configure and manage the EtherSwitch service module usinga combination of the Cisco Router and Security Device Manager (SDM) and the embedded EtherSwitch devicemanager. Both of these tools come pre-installed by default.Q. Do the EtherSwitch service modules work in the same platform as the existing EtherSwitch networkmodules and HWICs?A. Yes, you can use both the current EtherSwitch network modules and HWICs along with the EtherSwitch servicemodules. Because they do not share a common VLAN database, you do not need to connect the currentEtherSwitch network modules with the new modules through intrachassis stacking. However you must continueto use intrachassis stacking to connect two of the current EtherSwitch network modules.Because the EtherSwitch service modules are standalone switches on a blade, they do not require intrachassisstacking, nor do they support it. Connectivity between the current EtherSwitch network modules and the newservice modules can be achieved in one of two ways: either at Layer 3 through the router backplane, or over atrunking connection using an external Ethernet cable. With the trunking approach, separate VLAN databasesare maintained for the EtherSwitch service module and the aggregation of current modules in the platform.Because multiple VLAN database files are involved in the scenario described above, VLAN Trunking Protocol(VTP) should be used for pruning VLANs between the databases.Q. How many switch ports can I install in each platform?A. Table 3 shows the maximum switch port densities in Cisco routers.Table 3.Maximum Switch Port Densities per Router ModelPlatformEtherSwitchHWICsEtherSwitch NetworkModulesEtherSwitch ServiceModulesCisco 2691–11*, ** 16 FE 1 GECisco 3725–22*, *** 48 FE 2 GE 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.Maximum Switch Ports per PlatformPage 4 of 11