Introduction

The Cisco EtherSwitch service modules (NME-16ES-1G, NME-16ES-1G-P, NME-X-23ES-1G, NME-X-23ES-1G-P, NME-XD-48ES-2S-P, and NME-XD-24ES-1S-P) provide Cisco modular access routers the ability to stack Cisco EtherSwitch service modules as Layer 2 switches using Cisco StackWise technology. The Cisco EtherSwitch service modules are supported by either the IP base image (formerly known as standard multilayer image [SMI]) or the IP services image (formerly known as the enhanced multilayer image [EMI]). The IP base image provides Layer 2+ features, including access control lists (ACLs), quality of service (QoS), static routing, and the Routing Information Protocol (RIP). The IP services image provides a richer set of enterprise-class features, including Layer 2+ features and full Layer 3 routing (IP unicast routing, IP multicast routing, and fallback bridging). To distinguish it from the Layer 2+ static routing and RIP, the IP services image includes protocols such as the Enhanced Interior Gateway Routing Protocol (EIGRP) and the Open Shortest Path First (OSPF) Protocol.

The six types of Cisco EtherSwitch service modules are:

• NME-16ES-1G—Standard single-wide Cisco EtherSwitch service module with 16 10/100-Mbps ports, and 1 10/100/1000 Gigabit Ethernet port.
• NME-16ES-1G-P—Standard single-wide Cisco EtherSwitch service module with 16 10/100-Mbps ports with Power over Ethernet (PoE), and 1 10/100/1000 Gigabit Ethernet port.

Note: The 10/100/1000 Gigabit Ethernet port on the 16-port Cisco EtherSwitch service module does not support PoE.

• NME-X-23ES-1G—Extended single-wide Cisco EtherSwitch service module with
  23 10/100-Mbps ports and 1 10/100/1000 Gigabit Ethernet port.
• NME-X-23ES-1G-P—Extended single-wide Cisco EtherSwitch service module with
  23 10/100-Mbps PoE ports and 1 10/100/1000 Gigabit Ethernet port. All ports support PoE.
• NME-XD-48ES-2S-P—Extended double-wide Cisco EtherSwitch service module with
  48 10/100-Mbps PoE ports, and 2 small form-factor pluggable (SFP) Gigabit Ethernet service module ports
• NME-XD-24ES-1S-P—Extended double-wide Cisco EtherSwitch service module with
  24 10/100-Mbps PoE ports, 1 SFP port, and 2 Cisco StackWise ports

Specifications

The Cisco EtherSwitch service modules are shipped with either of these software images installed:

• IP base image, which provides Layer 2+ features (enterprise-class intelligent services). These features include access control lists (ACLs), quality of service (QoS), static routing, and the Hot Standby Router Protocol (HSRP) and the Routing Information Protocol (RIP). Cisco EtherSwitch service modules with the IP base image installed can be upgraded to the IP services image.

• IP services image, which provides a richer set of enterprise-class intelligent services. It includes all IP base image features plus full Layer 3 routing (IP unicast routing, IP multicast routing, and fallback bridging). To distinguish it from the Layer 2+ static routing and RIP, the IP services image includes protocols such as the Enhanced Interior Gateway Routing Protocol (EIGRP) and the Open Shortest Path First (OSPF) Protocol.

Some features noted in this section are available only on the cryptographic versions of the IP base image and IP services image. You must obtain authorization to use this feature and to download the cryptographic version of the software from Cisco.com.

The Cisco EtherSwitch service module has these features and benefits:

• Ease-of-Use and Ease-of-Deployment Features

• Performance Features

• Management Options

• Manageability Features

• Availability Features

• VLAN Features

• Security Features

• QoS and CoS Features

• Power-over-Ethernet Features

• Monitoring Features
Ease-of-Use and Ease-of-Deployment Features

• Express Setup for quickly configuring a Cisco EtherSwitch service module for the first time with basic IP information, contact information, Cisco EtherSwitch service module and Telnet passwords, and Simple Network Management Protocol (SNMP) information through a browser-based program.

• Graphical user interfaces (GUIs) for easier Cisco EtherSwitch service module configuration and monitoring. For more information about these GUIs, see the "Management Options" section.

• User-defined and Cisco-default SmartPorts macros for creating custom Cisco EtherSwitch service module configurations for simplified deployment across the network.

• Cisco StackWise technology for these uses:

–Connecting up to nine Cisco EtherSwitch service modules through Cisco StackWise ports and operating as a single switch in the network.

–Using a single IP address and configuration file to manage the entire switch stack.

–Automatic Cisco IOS software version-check of new stack members with the option to automatically load images from the stack master or from a TFTP server.

–Adding, removing, and replacing Cisco EtherSwitch service modules in the stack without disrupting the operation of the stack.

–Provisioning a new member for a switch stack with the offline configuration feature. You can configure the interface configuration for a specific stack member number in advance. The switch stack retains this information across stack reloads whether or not the provisioned
Cisco EtherSwitch service module is part of the stack.

–Displaying stack-ring activity statistics (the number of frames sent by each stack member to the ring).
Performance Features

• Autosensing of port speed and autonegotiation of duplex mode on all Cisco EtherSwitch service module ports for optimizing bandwidth

• Automatic-medium-dependent interface crossover (Auto-MDIX) capability on 10/100-Mbps interfaces that enables the interface to automatically detect the required cable connection type (straight-through or crossover) and to configure the connection appropriately

• Up to 32 Gbps of forwarding rates in a switch stack

• EtherChannel for enhanced fault tolerance and for providing up to 800 Mbps (Fast EtherChannel) of full-duplex bandwidth between Cisco EtherSwitch service modules, routers, and servers

• Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol (LACP) for automatic creation of EtherChannel links

• Forwarding of Layer 2 and Layer 3 packets at gigabit-per-second line rate across the
Cisco EtherSwitch service modules in the stack

• Per-port storm control for preventing broadcast, multicast, and unicast storms

• Port blocking on forwarding unknown Layer 2 unknown unicast, multicast, and bridged broadcast traffic

• Cisco Group Management Protocol (CGMP) server support and Internet Group Management Protocol (IGMP) snooping for IGMP versions 1, 2, and 3:

–(For CGMP devices) CGMP for limiting multicast traffic to specified end stations and reducing overall network traffic

–(For IGMP devices) IGMP snooping for efficiently forwarding multimedia and multicast traffic

• IGMP report suppression for sending only one IGMP report per multicast router query to the multicast devices (supported only for IGMPv1 or IGMPv2 queries)

• Multicast VLAN registration (MVR) to continuously send multicast streams in a multicast VLAN while isolating the streams from subscriber VLANs for bandwidth and security reasons

• IGMP filtering for controlling the set of multicast groups to which hosts on a Cisco EtherSwitch service module port can belong

• IGMP throttling for configuring the action when the maximum number of entries is in the IGMP forwarding table

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