Dell PowerConnect 3248 Manuale utente

www.dell.com | support.dell.com

Dell™ PowerConnect™ 3248 and 5224 Network Switches

Addendum to the 3248 and

5224 User’s Guides

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you

how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury,

or death.

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, and PowerConnect are trademarks of Dell Computer Corporation;

Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and

names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names

other than its own.

January 2003 P/N K0111 Rev. A01

Addendum to the 3248 and 5224 User’s Guides 3

Addendum to the 3248 and 5224

User’s Guides

NOTE: The graphics in

this section may differ

slightly from the graphics

on your computer.

New Features:

• Remote System Logging

• Secure Access — Secure Shell (SSH), Authentication Settings, and

Secure Hypertext Transfer Protocol (HTTPS)

• Increased Port Security

• Spanning Tree Protocol (STP)

• IP Filtering — Simple Network Management Protocol (SNMP)

• Enhanced Statistics Summaries

4Addendum to the 3248 and 5224 User’s Guides

www.dell.com | support.dell.com

System Logs

Remote system logging allows you to configure the logging of system

messages directly from the Web interface and the command line interface

(CLI).

The system log messages are categorized, by severity, into eight levels. The

levels range from 0 for Emergencies to 7 for Debugging. See the following

table for descriptions:

The system allows you to specify which levels are logged to RAM or flash

memory.

To assist in troubleshooting network problems, severe error messages that

are logged to flash memory are permanently stored in the switch. Up to 4 K

log entries can be stored in the flash memory. When the available memory

for logs exceeds 256 KB, the oldest entries are overwritten.

System Logs Configuration

The Switch/General/System Logs page allows you to configure and limit

system messages that are logged to flash or RAM memory. The default is set

for levels 0 to 3 to be logged to flash and levels 0 to 7 to be logged to RAM.

The Switch/General/System Logs page contains the following fields that

can be edited:

•System Log Status — Enables/disables the logging of debug or error

messages to the logging process.

Level Argument Level Description

Emergencies 0 System unusable

Alerts 1 Immediate action needed

Critical 2 Critical conditions

Errors 3 Error conditions

Warnings 4 Warning conditions

Notifications 5 Normal but significant condition

Informational 6 Informational messages only

Debugging 7 Debugging messages

Addendum to the 3248 and 5224 User’s Guides 5

•Flash Level — Limits log messages saved to the switch’s permanent

flash memory for all levels up to the specified level. For example, if

level 3 is specified, all messages from level 0 to level 3 are logged to

flash.

NOTE: The Flash Level

must be equal to or less

than the Ram Level.

•Ram Level — Limits log messages that are saved to the switch’s

temporary RAM memory for all levels up to the specified level. For

example, if level 7 is specified, all messages from level 0 to level 7 are

logged to RAM.

NOTE: System log

messages are logged

every 60 minutes.

To save any changes you make in this page, click Apply Changes. If you do

not want to save the changes, click Refresh.

The following figure is representative of PowerConnect 3248 and 5224.

6Addendum to the 3248 and 5224 User’s Guides

www.dell.com | support.dell.com

CLI Commands

The following table summarizes the equivalent CLI commands for items in

the Switch/General/System Logs page.

Example

Console(config)#logging on

Console(config)#logging history ram 0

Console(config)#

Console#show logging flash

Syslog logging: Disable

History logging in FLASH: level errors

Console#

Remote Logs Configuration

The Switch/General/Remote Logs page allows you to configure the logging

of messages that are sent to syslog servers or other management stations.

You can also limit the error messages sent to messages of a specified level.

Command Usage

logging on Controls the logging of debug or error messages to

a logging process.

The no form command disables the logging

process.

logging history {flash |

ram} level

Limits syslog messages saved to switch memory

based on severity.

The no form command returns the logging of

syslog messages to the default level.

flash — event history stored in flash memory

(permanent memory)

ram — event history stored in temporary RAM

(memory flushed on power reset)

show logging {flash | ram

| trap}

Displays the logging configuration for system and

event messages

Addendum to the 3248 and 5224 User’s Guides 7

The Switch/General/Remote Logs page contains the following fields that

can be edited:

•Remote Log Status — Enables/disables the logging of debug or error

messages to the remote logging process. (Default: Enabled)

•Logging Facility — Sets the facility type for remote logging of syslog

messages. There are eight facility types specified by values of 16 to 23.

The syslog server uses the facility type to dispatch log messages to an

appropriate service. (Default: 23)

•Logging Trap — Limits log messages that are sent to the remote syslog

server for all levels up to the specified level. For example, if level 3 is

specified, all messages from level 0 to level 3 are sent to the remote

server. (Default: 3)

•Host IP List — Displays the list of remote server IP addresses that

receive the syslog messages. The maximum number of host IP

addresses allowed is five.

•Host IP Address — Specifies a new server IP address to add to the

Host IP List.

To add an IP address to the Host IP List, type the new IP address in the

Host IP Address box, and click Add IP Host. To delete an IP address, click

the entry in the Host IP List, and click Remove Host IP.

To save any changes you make in this page, click Apply Changes. If you do

not want to save the changes, click Refresh.

8Addendum to the 3248 and 5224 User’s Guides

www.dell.com | support.dell.com

The following figure is representative of PowerConnect 3248 and 5224.

CLI Commands

The following table summarizes the equivalent CLI commands for items in

the Switch/General/Remote Logs page.

Command Usage

logging host

host_ip_address

Adds a syslog server host IP address that receives

logging messages.

The no form command removes a syslog server

host.

logging facility

facility_type

Sets the facility type for remote logging of syslog

messages.

The no form command returns the facility type to

the default.

logging trap level Limits syslog messages saved to a remote server

based on severity.

The no form command returns the remote logging

of syslog messages to the default level.

Addendum to the 3248 and 5224 User’s Guides 9

Example

Console(config)#logging host 10.1.0.9

Console(config)#logging facility 23

Console(config)#logging trap 4

Console(config)#

Console#show logging trap

Syslog logging: Enable

REMOTELOG status: enable

REMOTELOG facility type: local use 7

REMOTELOG level type: Warning conditions

REMOTELOG server ip address: 10.1.0.9

REMOTELOG server ip address: 0.0.0.0

Console#

Security

The Switch/Security page contains new links to Secure Shell (SSH) and

Secure Hypertext Transfer Protocol (HTTPS) configuration. The RADIUS

Settings page was renamed Authentication Settings and updated to

include Terminal Access Controller Access Control System Plus

(TACACS+).

• SSH

• Authentication Settings

•HTTPS

show logging {flash | ram

| trap}

Displays the logging configuration for system and

event messages

Command Usage

10 Addendum to the 3248 and 5224 User’s Guides

www.dell.com | support.dell.com

Secure Shell

The Secure Shell (SSH) server feature provides remote management access

using encrypted paths between the switch and SSH-enabled management

station clients.

NOTE: There are two

versions of the SSH

protocol currently

available: SSH v1.

and

SSH v2.

. The switch

supports only SSH v1.5.

•SSH Server Status — Allows you to enable/disable the SSH server

feature on the switch. (Default: Enabled)

•SSH authentication timeout — Specifies the time interval in seconds

that the SSH server waits for a response from a client during an

authentication attempt. (Range: 1 to 120 seconds; Default: 120 seconds)

•SSH authentication retries — Specifies the number of authentication

attempts that a client is allowed before authentication fails and the

client must restart the authentication process. (Range: 1 to 5 times;

Default: 3)

To save any changes you make in this page, click Apply Changes. If you do

not want to save the changes, click Refresh.

The following figure is representative of PowerConnect 3248 and 5224.

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