© 1999, Cisco Systems, Inc. 3-1 Chapter 10 Controlling Campus Device Access Chapter 3 Connecting...

© 1999, Cisco Systems, Inc. 3-1

Chapter 10

Controlling Campus Device Access

Chapter 3Chapter 3

Connecting the Switch BlockConnecting the Switch BlockConnecting the Switch BlockConnecting the Switch Block

© 1999, Cisco Systems, Inc. 3-1

© 1999, Cisco Systems, Inc. www.cisco.com BCMSN—3-2

ObjectivesObjectives

Upon completion of this chapter, you will be able to perform the following tasks:• Provide physical links between devices

• Configure connectivity to the access layer using Ethernet

• Configure high-speed access to the distribution layer using Fast Ethernet

• Provide an secondary high-speed path to a backup distribution switch using Fast Ethernet

• Enable inter-block communications through links to the core.


Connecting the Switch BlockConnecting the Switch Block

In this chapter, we discuss the following topics:• Cable media types

• Cabling switch block devices

• Configuring connectivity within the switch block


Connecting the Switch Block (cont.)

Connecting the Switch Block (cont.)

In this section we discuss the following topics:• Cable media types

–Ethernet

–Fast Ethernet

–Gigabit Ethernet




Problem: Need for More Bandwidth

Problem: Need for More Bandwidth

Bandwidth requirement is impacted by the number of users and types of applications


Solution: Ethernet 10BaseT in the Switch Block

Solution: Ethernet 10BaseT in the Switch Block

Ethernet 10BaseT Ethernet 10BaseT

10-Mbps LAN switching is integrated to the desktop, providing dedicated bandwidth and virtual LAN services to the end stations.


100Mbps

Solution: Fast Ethernet in the Switch Block

Solution: Fast Ethernet in the Switch Block

100 Mbps

• Enhances client/server performance across the enterprise

• Connect directly to Fast Ethernet interfaces on LAN switches which aggregate traffic from 10-Mbps segments

100Mbps


What Is Fast Ethernet?What Is Fast Ethernet?

• Built on Ethernet principals

• Runs at 100 Mbps

• Uses same frame types, lengths, and formats

• Still CSMA/CD

• Same MAC layer, new physical layer

100Mbps

100 Mbps

10 Mbps

100 Mbps


Increasing FE Performance with Full Duplex

Increasing FE Performance with Full Duplex

In full-duplex mode, 100 Mbps is available in each direction

200 Mbps100 Mbps

100 Mbps


Increasing FE Performance with Autonegotiation

Increasing FE Performance with Autonegotiation

Allows devices at each end of a network link to automatically exchange information about the link capabilities

I am sending data at 10 Mbps




100 Mbps

10 Mbps


Solution: Gigabit Ethernet in the Switch Block

Solution: Gigabit Ethernet in the Switch Block

1000Mbps

1000 Mbps

1000Mbps

• Enhances client/server performance across the enterprise

• Connects directly to Gbps interfaces on LAN switches which aggregate traffic from 10- or 100-Mbps segments

• Connects distribution-layer switches in each building with a central campus core


Gigabit Ethernet Protocol Architecture

Gigabit Ethernet Protocol Architecture

FC-4 Upper LayerMapping

FC-4 Upper LayerMapping

FC-3 CommService

FC-3 CommService

FC-2 SignalingFC-2 Signaling

FC-1Encode/Decode

FC-1Encode/Decode

FC-0 Interfaceand Media

FC-0 Interfaceand Media

IEEE 802.2 L LCIEEE 802.2 L LC

IEEE 802.3CSMA/CDIEEE 802.3CSMA/CD

IEEE802.3Physical Layer

IEEE802.3Physical Layer

IEEE 802.3Ethernet

ANSI X3T 11FibreChannel

IEEE 802.3zGigabit Ethernet

IEEE 802.2 LLCIEEE 802.2 LLC

CSMA/CD or Full-DuplexMedia Access Control (MAC)

CSMA/CD or Full-DuplexMedia Access Control (MAC)

8B/10B Encode/Decode8B/10B Encode/Decode

Serializer/DeserializerSerializer/Deserializer

ConnectorConnector


Subscribing LinksSubscribing Links

...

...100-Mbps

Fast Ethernet

100-MbpsFast Ethernet

80% LocalTraffic

20% RemoteTraffic

10-MbpsEthernet


Subscribing Links (cont.)Subscribing Links (cont.)


Equal-Cost Paths

E-MailServer

...

...


80% LocalTraffic

20% RemoteTraffic

10-MbpsEthernet



In this section, we discuss the following topics:

• Cable media types


–Cabling to a console port

–Cabling to an Ethernet port



Connecting to a Console Port Connecting to a Console Port

1900 Series Console Port

5000 Series Console PortConsole Port

Console Port


Connecting to an Ethernet Port Connecting to an Ethernet Port

Ethernet Ports

Link State LED



In this section we discuss the following topics:• Cable media types



– Limiting switch access

– Uniquely defining switching

– Configuring switch remote accessibility

– Identifying switch ports

– Defining link speed

– Maximizing data transmission

– Verifying connectivity


Limiting Access to DevicesLimiting Access to Devices

Passwords are used to limit access to the switch


Uniquely Identifying a DeviceUniquely Identifying a Device

The host or prompt name uniquely identifies each device at the command-line interface

Hello, My Name Is:Hello, My Name Is:

ASW44


DSW145


CORE1

Switch(config)#hostname ASW44ASW44(config)#

Switch(enable)prompt DSW145DSW145(enable)

Switch(enable)#prompt CORE1 CORE1(enable)

Catalyst 1912

Catalyst 5000

Catalyst 6500


Configuring Switch Remote Accessibility

Configuring Switch Remote Accessibility

An IP address associates a switch with a management VLAN

Management VLAN = 176.16.1.0

176.16.1.3

176.16.1.1

176.16.1.21

176.16.1.22

176.16.1.23

176.16.1.33176.16.1.32

176.16.1.31


Uniquely Identifying Interfaces/Ports

Uniquely Identifying Interfaces/Ports

A name or description uniquely identifies an interface or port

Port 2/1Primary Link to ASW41

Interface eth 0/4PC To ASW41 Port

ASW41

Switch#show runBuilding configuration...Current configuration:!(text deleted)

interface Ethernet 0/4 duplex half description “PC TO ASW44 PORT”

DSW145 (enable) show portPort Name Status Vlan Level Duplex Speed Type----- ------------------ ---------- ---------- ------ ------ ----- ------------ 2/1 Prim link to ASW41 connected trunk normal full 100 10/100BaseTX


Defining Link SpeedDefining Link Speed

• Configurable on the Catalyst 2900/4000/5000/6000 series switch

• Fixed configuration on the Catalyst 1900/2800 series switch

Switch#show interface fastethernet 0/26FastEthernet 0/26 is EnabledHardware is Built-in 100Base-TX

Switch#show interface ethernet 0/4Ethernet 0/4 is EnabledHardware is Built-in 10Base-T

Switch (enable) set port speed 2/4 100Port(s) 2/4 speed set to 100Mbps.

DSW111 (enable) show port 2/4Port Name Status Vlan Level Duplex Speed Type----- -------- ---------- ---------- ------ ------ ----- ------------ 2/4 connected trunk normal full 100 10/100BaseTX


Maximizing Data TransmissionMaximizing Data Transmission

Full duplex is the simultaneous action of transmitting and receiving data by two devices


Verifying ConnectivityVerifying Connectivity

!!!!!Success Rate Is 100 Percent (5/5), Round-Trip min/avg/max 0/4/10/ ms

Switch#ping 172.16.1.47

Sending 5, 100-Byte ICMP Echos to 172.16.1.47, Timeout Is 2 Seconds: 172.16.1.47

The ping command sends a specified number of ICMP echo requests and measures the time the destination device takes to respond to each request


Laboratory Exercise: Visual Objective

Laboratory Exercise: Visual Objective

Fast Ethernet Links

Fast Ethernet Links

Fast Ethernet Links

Fast Ethernet Links

Layer 2 Core Switch Layer 2 Core Switch

Switch BlockEthernet

Links


Summary Summary

After completing this chapter, you should be able to perform the following tasks:• The module design of the campus network

design allows for scaling bandwidth

• Each device in the switch block must be addressable and accessible

• Assigning an IP address to switch associates that switch with the management VLAN

• Port speeds are fixed on the Catalyst 1900 and 2800 series switches, but negotiable on the higher-end switches


Review Review

1. Describe the three major link technologies and where each is most effective in the campus network.

2. List the steps necessary to configure an Ethernet connection on an access switch.

3. List the steps necessary to configure a Fast Ethernet connection between the access and distribution layer devices.

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© 1999, Cisco Systems, Inc. 3-1 Chapter 10 Controlling Campus Device Access Chapter 3 Connecting...

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