Catalyst 2820 Series

Product Overview

The modular Catalyst 2820 series switches are the ideal solution for Ethernet workgroups and individual users who need increased performance at an affordable price, and 100BaseT, Fiber Distributed Data Interface (FDDI), or Asynchronous Transfer Mode (ATM) connectivity to servers and network backbones.

A Catalyst 2820 series Standard Edition switch is an effective backbone in a small/medium business network, aggregating 10BaseT hubs and network resources, or used at the workgroup level in a large network for dedicated, high speed connections from individual desktops to servers and other network devices.

Standard Edition switches are upgradeable to provide unmatched flexibility and scalability when combined with Enterprise Edition software. Enterprise Edition software enables these switches to deliver unmatched network configuration flexibility and scalability through embedded Cisco technologies, delivering comprehensive management and security, bandwidth optimization, networked multimedia, and virtual LAN (VLAN) support. The Enterprise Edition software is pre-installed in Enterprise Edition switches, and available as an Upgrade Kit for Standard Edition switches.

Key Features and Benefits

Standard Edition Feature Summary

• Software upgradeable to Enterprise Edition

• 4 models with 24 10BaseT ports, two slots, and choice of 2K or 8K MAC address cache

• Choice of 9 high-speed modules support 100BaseT, FDDI, and ATM

• Full-duplex operation on all Ethernet and Fast Ethernet ports

• Auto-negotiation on 100BaseTX ports for automatically selecting half-and full-duplex operation

• Congestion control features including IEEE 802.3x-based flow control, and back-pressure based flow control on 10BaseT ports

• Web-based network management

Performance

• Twelve or twenty-four 10BaseT ports deliver dedicated 10 Mbps of bandwidth to individual users or workgroups to support bandwidth-intensive applications

• Two high-speed expansion slots maximize high-speed configuration and backbone flexibility

• One switched Attachment Unit Interface (AUI) port for connecting to fiber or legacy 10Base2 or 10Base5 networks

• Shared-memory architecture with 3-MB packet buffer virtually eliminates packet loss

• Non-blocking, ClearChannel architecture supports wire-speed bridging on all ports, delivering up to 370 Mbps maximum forwarding bandwidth, and 550,000 pps aggregate

• CollisionFree full-duplex operation on switched 10BaseT and 100BaseT ports delivers up to 200 Mbps of bandwidth to end stations, servers and between switches

• Choice of congestion control options for applications that require zero packet loss:

• Enhanced congestion control accelerates packet forwarding when the switch buffers are full

• Back-pressure on half-duplex Ethernet ports throttles network transmission using the IEEE 802.3 Layer 2 back-off algorithm

• IEEE 802.3x flow control on 100BaseTX ports provides intelligent flow management between switches and between a switch and a server

• Per-port broadcast storm control prevents faulty end stations from degrading overall system performance with broadcast storms

• Choice of cut-through or store-and-forward switching lets administrators optimize for performance or error checking

• Security and Redundancy

• IEEE 802.1d Spanning-Tree Protocol support for redundant backbone connections and loop-free networks simplifies network configuration and improves fault tolerance

• User-selectable address learning mode simplifies configuration and enhances security

• Support for optional Cisco 600 watt redundant AC power system provides a backup power source for up to four units for improved fault tolerance and network uptime

• Flexible Network Configuration

• No per-port Media Access Control (MAC) address limitations--provides flexibility to connect to individual users or shared hubs. Support for 1024 MAC addresses on Catalyst 1900 and up to 8192 addresses on Catalyst 2820. Allows switch to scale with a growing network

• Configurable network port that supports unlimited MAC addresses for backbone connectivity

Management

• Simple Network Management Protocol (SNMP) and Telnet support delivers comprehensive in-band manageability, and a menu-based management console provides in-depth, out-of-band manageability

• Support for all nine RMON groups through use of a SwitchProbe Analyzer port that permits traffic monitoring of a single port, a group of ports, or the entire switch from a single network analyzer or RMON probe

• Integrated HTML interface enables management via a Web browser*

• Cisco Discovery Protocol (CDP) enables a CiscoWorks network management station to automatically discover the switch in a network topology

• Autonegotiation on 100BaseTX ports automatically selects half- or full-duplex transmission mode to optimize bandwidth

Figure 8-21: Catalyst 2820 Series Front View

Figure 8-22: Catalyst 2820 Series Rear View

Specifications

Table 8-25: Catalyst 2820 Summary of Features

Characteristic	Description
Performance	1-Gbps bus 370-Mbps maximum forwarding bandwidth 3-MB packet buffer memory dynamically shared by all ports
Selectable switching option:	FragmentFree cut-through-forward after collision window (64 bytes) Store and forward--forward after packet receipt
Packet forwarding rate for 64-byte packets:	14,880 packets per second (pps) to 10-Mbps ports 148,800 pps to 100BaseT module ports Up to 100,000 pps to FDDI module ports Up to 550,500 pps aggregate
Latency (FragmentFree cut-through switching mode):	70 microseconds between 10BaseT ports 11 microseconds between 100BaseT ports
MAC addresses:	1024 per system (Catalyst 1900 series) 2048 or 8192 per system (Catalyst 2820 series) Unlimited MAC address support on configurable network port
Management	SNMP Management Information Base (MIB) II, SNMP MIB extensions Station Management (SMT) 7.3, FDDI MIB, Bridging MIB (RFC 1493)
Standards	IEEE 802.3x full duplex on 10BaseT and 100BaseT ports IEEE 802.3x flow control on 100BaseT ports IEEE 802.1d Spanning-Tree Protocol IEEE 802.3u 100BaseTX and 100BaseFX specifications IEEE 802.3 10BaseT specification IEEE 802.3 AUI specification ATM Forum LANE 1.0; UNI 3.0/3.1; RFC 1483
Connectors and Cabling	10-Mbps ports: RJ-45 connectors; two-pair Category 3, 4 or 5 UTP cabling; DB15 connector on AUI port 100BaseTX ports: RJ-45 connectors; two-pair Category 5 UTP cabling 100BaseFX port: SC connector, 50/125- and 62.5/125-micron multimode fiber-optic cabling Management console port: RJ-45 connector Rack mount kit included
Indicators	Per-port status LEDs--Link Integrity, Disabled, Activity, and Full-Duplex indications System status LEDs--System, RPS, Module Enabled, and bandwidth utilization indications
Dimensions	3.43 x 17.5 x 12.4 in (8.76 x 44.45 x 31.5 cm)
Weight	13 lb. (5.9 kg)

Table 8-26: Environmental Conditions and Power Requirements

Characteristic	Description
Operating temperature:	23 to 113°F (-5 to 45°C)
Operating relative humidity:	10 to 95% noncondensing
Operating altitude:	Up to 9842 ft. (3000 m)
Power consumption:	110W (Catalyst 2820)
AC input voltage/frequency:	90 to 127/200 to 250 VAC (auto-ranging) 50 to 60 Hz
Safety and Electromagnetic Emissions Certifications	UL 1950 CSA 22.2 No. 950 EN 60950 IEC 950 FCC Part 15 Class A, verified to Class B CE Marking EN 55022B Class B VCCI Class II

Software for the Catalyst(r) 2820

For information about the Enterprise Edition Software, see Chapter 6, "Enterprise Edition Software."

Services and Support

All Catalyst 2820 series switches come with a one year limited return to factory warranty that can be extended for a total of three years. SMARTnet and Comprehensive Support Packages are both available. Support options range from help desk assistance to proactive, onsite consultation. All support contracts include major Cisco IOS software updates, full access rights to Cisco Connection Online, and 24-hour-a-day technical assistance. Contact your local sales office for further information.

Documentation

For the Catalyst 2820 Series Installation and Configuration Guide, the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/28ic/index.htm

For the Enterprise Edition Software guide, see the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/00/index.htm

Ordering Information

Catalyst 2820 series Standard and Enterprise Edition switches

All base units include 1 year limited return to factory warranty.

Table 8-27: Catalyst 1900 Series Product Numbers

Description	Product Number
Catalyst 2820 Standard Edition with 24 switched 10BaseT ports, two high-speed expansion slots, and 2048 MAC address cache. Software upgradeable to Enterprise Edition.	WS-C2822-A
Catalyst 2820 Standard Edition with 24 switched 10BaseT ports, two high-speed expansion slots, and 8192 MAC address cache. Software upgradeable to Enterprise Edition.	WS-C2828-A
Catalyst 2820 Enterprise Edition with 24 switched 10BaseT ports, two high-speed expansion slots, and 2048 address cache	WS-C2822-EN
Catalyst 2820 Enterprise Edition with 24 switched 10BaseT ports, two high-speed expansion slots, and 8192 address cache	WS-C2828-EN
Modules for Catalyst 2820 models	WS-X2811
1-port 100BaseTX module	WS-X2818
8-port 100BaseTX module	WS-X2821
1-port 100BaseFX module	WS-X2824
4-port 100BaseFX module	WS-X2841
FDDI Fiber SAS module	WS-X2842
FDDI Fiber DAS module	WS-X2831
FDDI VTP SAS module	WS-X2851
1-port ATM 155 UTP Module	WS-X2861
1-port ATM 155 Multimode Fiber Module
Enterprise Edition Software
Catalyst 1900/2820 Enterprise Edition Upgrade Kit	WS-C19/28EEUG-7.02