Cisco HWIC-4ESW - EtherSwitch HWIC Switch Manuale utente

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Cisco HWIC-4ESW and HWIC-D-9ESW

EtherSwitch Interface Cards

First Published: May 17, 2005

Last Updated: July 28, 2010

This document provides configuration tasks for the 4-port Cisco HWIC-4ESW and the 9-port

Cisco HWIC-D-9ESW EtherSwitch high-speed WAN interface cards (HWICs) hardware feature

supported on Cisco 1800 (modular), Cisco 2800, and Cisco 3800 series integrated services routers.

Cisco EtherSwitch HWICs are 10/100BASE-T Layer 2 Ethernet switches with Layer 3 routing

capability. (Layer 3 routing is forwarded to the host and is not actually performed at the switch.) Traffic

between different VLANs on a switch is routed through the router platform. Any one port on a

Cisco EtherSwitch HWIC may be configured as a stacking port to link to another Cisco EtherSwitch

HWIC or EtherSwitch network module in the same system. An optional power module can also be added

to provide inline power for IP telephones. The HWIC-D-9ESW HWIC requires a double-wide card slot.

This hardware feature does not introduce any new or modified Cisco IOS commands.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature

information and caveats, see the release notes for your platform and software release. To find information

about the features documented in this module, and to see a list of the releases in which each feature is

supported, see the “Feature Information for the Cisco HWIC-4ESW and the Cisco HWIC-D-9ESW

EtherSwitch Cards” section on page 104.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS

software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An

account on Cisco.com is not required.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

Contents

The following sections provide information about the Cisco EtherSwitch HWICs.

•Prerequisites for EtherSwitch HWICs, page 2

•Restrictions for EtherSwitch HWICs, page 2

•Information About EtherSwitch HWICs, page 3

•How to Configure EtherSwitch HWICs, page 5

•Configuration Examples for EtherSwitch HWICs, page 91

•Additional References, page 102

Prerequisites for EtherSwitch HWICs

The following are prerequisites to configuring EtherSwitch HWICs:

•Configuration of IP routing. See the Cisco IOS IP Routing: Protocol-Independent Configuration

Guide for the Cisco IOS Release you are using.

•Use of the Cisco IOS T release, beginning with Release 12.3(8)T4 or later for Cisco HWIC-4ESW

and Cisco HWIC-D-9ESW support. (See the Cisco IOS documentation.)

Restrictions for EtherSwitch HWICs

The following restrictions apply to the Cisco HWIC-4ESW and the Cisco HWIC-D-9ESW EtherSwitch

HWICs:

•No more than two Ethernet Switch HWICs or network modules may be installed in a host router.

Multiple Ethernet Switch HWICs or network modules installed in a host router will not act

independently of each other. They must be stacked, as they will not work at all otherwise.

•The ports of a Cisco EtherSwitch HWIC must NOT be connected to the Fast Ethernet/Gigabit

onboard ports of the router.

•There is no inline power on the ninth port (port 8) of the HWIC-D-9ESW card.

•There is no Auto MDIX support on the ninth port (port 8) of the HWIC-D-9ESW card when either

speed or duplex is not set to auto.

•There is no support for online insertion/removal (OIR) of the EtherSwitch HWICs.

•When Ethernet Switches have been installed and configured in a host router, OIR of the

CompactFlash memory card in the router must not occur. OIR of the CompactFlash memory card

will compromise the configuration of the Ethernet Switches.

•VTP pruning is not supported.

•There is a limit of 200 secure MAC addresses per module that can be supported by an EtherSwitch

HWIC.

•Maximum traffic for a secure MAC address is 8 Mb/s.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

Prerequisites for Installing Two Ethernet Switch Network Modules in a Single Chassis

Prerequisites for Installing Two Ethernet Switch Network

Modules in a Single Chassis

A maximum of two Ethernet switch network modules can be installed in a single chassis. If two Ethernet

switch network modules of any type are installed in the same chassis, the following configuration

requirements must be met:

•Both Ethernet switch network modules must have an optional Gigabit Ethernet expansion board

installed.

•An Ethernet crossover cable must be connected to the two Ethernet switch network modules using

the optional Gigabit Ethernet expansion board ports.

•Intrachassis stacking for the optional Gigabit Ethernet expansion board ports must be configured.

For information about intrachassis stacking configuration, see the 16- and 36-Port Ethernet Switch

Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series module.

Note Without this configuration and connection, duplications will occur in the VLAN databases, and

unexpected packet handling may occur.

Information About EtherSwitch HWICs

•VLANs, page 3

•Inline Power for Cisco IP Phones, page 4

•Layer 2 Ethernet Switching, page 4

•802.1x Authentication, page 4

•Spanning Tree Protocol, page 4

•Cisco Discovery Protocol, page 4

•Switched Port Analyzer, page 4

•IGMP Snooping, page 4

•Storm Control, page 4

•Intrachassis Stacking, page 5

•Fallback Bridging, page 5

•Default 802.1x Configuration, page 5

VLANs

For conceptual information about VLANs, see the “VLANs” section of the EtherSwitch Network

Module.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

Information About EtherSwitch HWICs

Inline Power for Cisco IP Phones

For conceptual information about inline power for Cisco IP phones, see the “Inline Power for Cisco IP

Phones” section of the EtherSwitch Network Module.

Layer 2 Ethernet Switching

For conceptual information about Layer 2 Ethernet switching, see the “Layer 2 Ethernet Switching”

section of the EtherSwitch Network Module.

802.1x Authentication

For conceptual information about 802.1x authentication, see the “802.1x Authentication” section of the

EtherSwitch Network Module.

Spanning Tree Protocol

For conceptual information about Spanning Tree Protocol, see the “Using the Spanning Tree Protocol

with the EtherSwitch Network Module” section of the EtherSwitch Network Module.

Cisco Discovery Protocol

For conceptual information about Cisco Discovery Protocol, see the “Cisco Discovery Protocol” section

of the EtherSwitch Network Module.

Switched Port Analyzer

For conceptual information about a switched port analyzer, see the “Switched Port Analyzer” section of

the EtherSwitch Network Module.

IGMP Snooping

For conceptual information about IGMP snooping, see the “IGMP Snooping” section of the EtherSwitch

Network Module.

Storm Control

For conceptual information about storm control, see the “Storm Control” section of the EtherSwitch

Network Module.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

Information About EtherSwitch HWICs

Intrachassis Stacking

For conceptual information about intrachassis stacking, see the ‘Intrachassis Stacking” section of the

EtherSwitch Network Module.

Fallback Bridging

For conceptual information about fallback bridging, see the “Fallback Bridging” section of the

EtherSwitch Network Module.

Default 802.1x Configuration

Table 1 shows the default 802.1x configuration.

Table 1 Default 802.1x Configuration

Feature Default Setting

Authentication, authorization, and

accounting (AAA)

Disabled.

RADIUS server

•IP address

•UDP authentication port

•Key

•None specified.

•1645.

•None specified.

Per-interface 802.1x enable state Disabled (force-authorized).

The port transmits and receives normal traffic without

802.1x-based authentication of the client.

Periodic reauthentication Disabled.

Number of seconds between

reauthentication attempts

3600 seconds.

Quiet period 60 seconds (number of seconds that the switch remains in

the quiet state following a failed authentication exchange

with the client).

Retransmission time 30 seconds (number of seconds that the switch should

wait for a response to an EAP request/identity frame

from the client before retransmitting the request).

Maximum retransmission number 2 times (number of times that the switch will send an

EAP-request/identity frame before restarting the

authentication process).

Multiple host support Disabled.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

802.1x Configuration Guidelines

These are the 802.1x authentication configuration guidelines:

•When the 802.1x protocol is enabled, ports are authenticated before any other Layer 2 feature is

enabled.

•The 802.1x protocol is supported on Layer 2 static-access ports, but it is not supported on these port

types:

–

Trunk port—If you try to enable 802.1x on a trunk port, an error message appears, and 802.1x

is not enabled. If you try to change the mode of an 802.1x-enabled port to trunk, the port mode

is not changed.

–

Switch Port Analyzer (SPAN) destination port—You can enable 802.1x on a port that is a SPAN

destination port; however, 802.1x is disabled until the port is removed as a SPAN destination.

You can enable 802.1x on a SPAN source port.

How to Configure EtherSwitch HWICs

•Configuring VLANs, page 5

•Configuring VLAN Trunking Protocol, page 7

•Configuring Layer 2 Interfaces, page 10

•Configuring 802.1x Authentication, page 18

•Configuring Spanning Tree, page 30

•Configuring MAC Table Manipulation, page 39

•Configuring Cisco Discovery Protocol, page 41

•Configuring the Switched Port Analyzer (SPAN), page 44

•Configuring Power Management on the Interface, page 46

•Configuring IP Multicast Layer 3 Switching, page 47

•Configuring IGMP Snooping, page 51

•Configuring Per-Port Storm Control, page 56

•Configuring Stacking, page 59

•Configuring Fallback Bridging, page 61

•Configuring Separate Voice and Data Subnets, page 76

Client timeout period 30 seconds (when relaying a request from the

authentication server to the client, the amount of time the

switch waits for a response before retransmitting the

request to the client). This setting is not configurable.

Authentication server timeout period 30 seconds (when relaying a response from the client to

the authentication server, the amount of time the switch

waits for a reply before retransmitting the response to the

server). This setting is not configurable.

Table 1 Default 802.1x Configuration (continued)

Feature Default Setting

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

•Managing the EtherSwitch HWIC, page 78

Configuring VLANs

This section describes how to configure VLANs on the switch and contains the following sections:

•Adding a VLAN Instance, page 6

•Deleting a VLAN Instance from the Database, page 6

Adding a VLAN Instance

A total of 15 VLANs can be supported by an EtherSwitch HWIC.

Follow the steps below to configure a Fast Ethernet interface as Layer 2 access.

SUMMARY STEPS

1. enable

2. vlan database

3. vlan vlan-id

4. exit

DETAILED STEPS

Deleting a VLAN Instance from the Database

You cannot delete the default VLANs for the different media types: Ethernet VLAN 1 and FDDI or

Token Ring VLANs 1002 to 1005.

Command or Action Purpose

Step 1 enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 vlan database

Example:

Router# vlan database

Enters VLAN configuration mode.

Step 3 vlan vlan-id

Example:

Router(vlan)# vlan 1

Adds an Ethernet VLAN.

•Enter the VLAN number.

Step 4 exit

Example:

Router(vlan)# exit

Updates the VLAN database, propagates it throughout the

administrative domain, and returns to privileged EXEC mode.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

Follow the steps below to delete a VLAN from the database.

SUMMARY STEPS

1. enable

2. vlan database

3. no vlan vlan-id

4. exit

DETAILED STEPS

Configuring VLAN Trunking Protocol

This section describes how to configure the VLAN Trunking Protocol (VTP) on an EtherSwitch HWIC,

and contains the following tasks:

•Configuring a VTP Server, page 7

•Configuring a VTP Client, page 8

•Disabling VTP (VTP Transparent Mode), page 9

Note VTP pruning is not supported by EtherSwitch HWICs.

Configuring a VTP Server

When a switch is in VTP server mode, you can change the VLAN configuration and have it propagate

throughout the network.

Follow the steps below to configure the switch as a VTP server.

Command or Action Purpose

Step 1 enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 vlan database

Example:

Router# vlan database

Enters VLAN configuration mode.

Step 3 no vlan vlan-id

Example:

Router(vlan)# no vlan 1

Deletes an Ethernet VLAN.

•Enter the VLAN number.

Step 4 exit

Example:

Router(vlan)# exit

Updates the VLAN database, propagates it throughout the

administrative domain, and returns to privileged EXEC mode.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

SUMMARY STEPS

1. enable

2. vlan database

3. vtp server

4. vtp domain domain-name

5. vtp password password-value

6. exit

DETAILED STEPS

Configuring a VTP Client

When a switch is in VTP client mode, you cannot change the VLAN configuration on the switch. The

client switch receives VTP updates from a VTP server in the management domain and modifies its

configuration accordingly.

Follow the steps below to configure the switch as a VTP client.

Command or Action Purpose

Step 1 enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 vlan database

Example:

Router# vlan database

Enters VLAN configuration mode.

Step 3 vtp server

Example:

Router(vlan)# vtp server

Configures the switch as a VTP server.

Step 4 vtp domain domain-name

Example:

Router(vlan)# vtp domain distantusers

Defines the VTP domain name.

•Enter the VTP domain name. Domain names can be a

maximum of 32 characters.

Step 5 vtp password password-value

Example:

Router(vlan)# vtp password philadelphia

(Optional) Sets a VTP domain password

•Enter a password. Passwords can be from 8 to 64 characters.

Step 6 exit

Example:

Router(vlan)# exit

Updates the VLAN database, propagates it throughout the

administrative domain, exits VLAN configuration mode, and

returns to privileged EXEC mode.

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

How to Configure EtherSwitch HWICs

SUMMARY STEPS

1. enable

2. vlan database

3. vtp client

4. exit

DETAILED STEPS

Disabling VTP (VTP Transparent Mode)

When you configure the switch as VTP transparent, you disable VTP on the switch. A VTP transparent

switch does not send VTP updates and does not act on VTP updates received from other switches.

Follow the steps below to disable VTP on the switch.

SUMMARY STEPS

1. enable

2. vlan database

3. vtp transparent

4. exit

Command or Action Purpose

Step 1 enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 vlan database

Example:

Router# vlan database

Enters VLAN configuration mode.

Step 3 vtp client

Example:

Router(vlan)# vtp client

Configures the switch as a VTP client.

Step 4 exit

Example:

Router(vlan)# exit

Updates the VLAN database, propagates it throughout the

administrative domain, exits VLAN configuration mode and

returns to privileged EXEC mode.

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