Aruba AT-8400 SERIES User manual

AT-S60
Management
Software
AT-S60
◆
Command Line
User’s Guide
AT-8400 SERIES SWITCH
VERSION 2.0.0
®
PN 613-50401-00 Rev B

Copyright ©2004 Allied Telesyn, Inc.
960 Stewart Drive Suite B, Sunnyvale, CA 94085 USA
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, Inc.
Microsoft is a registered trademark of Microsoft Corporation, Netscape Navigator is a registered trademark of Netscape
Communications Corporation. All other product names, company names, logos or other designations mentioned herein are
trademarks or registered trademarks of their respective owners.
Allied Telesyn, Inc. reserves the right to make changes in specifications and other information contained in this document without prior
written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesyn, Inc. be liable for
any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising out of or related
to this manual or the information contained herein, even if Allied Telesyn, Inc. has been advised of, known, or should have known, the
possibility of such damages.

1
Table of Contents
Preface ...................................................................................................................................................................................................................... 7
How This Guide is Organized .............................................................................................................................................................................7
Security Features .......................................................................................................................................................................................... 9
Document Conventions ....................................................................................................................................................................................10
Where to Find Web-based Guides .................................................................................................................................................................11
Contacting Allied Telesyn .................................................................................................................................................................................12
Online Support ............................................................................................................................................................................................ 12
Email and Telephone Support ............................................................................................................................................................... 12
For Sales or Corporate Information ..................................................................................................................................................... 12
Obtaining Management Software Updates ...............................................................................................................................................13
Chapter 1
Starting a Command Line Management Session ...............................................................................................................................14
Starting a Management Session .....................................................................................................................................................................15
Command Line Interface Features .................................................................................................................................................................16
Command Formatting .......................................................................................................................................................................................17
Specifying Ports .......................................................................................................................................................................................... 17
Chapter 2
Basic Command-Line Commands ..............................................................................................................................................................19
CLEAR SCREEN .......................................................................................................................................................................................................20
LOGOFF and QUIT ................................................................................................................................................................................................21
MENU ........................................................................................................................................................................................................................22
SAVE CONFIGURATION ......................................................................................................................................................................................23
SET PROMPT ...........................................................................................................................................................................................................24
SET SWITCH CONSOLEMODE ...........................................................................................................................................................................25
SHOW USER ............................................................................................................................................................................................................26
Chapter 3
Basic Switch Commands .................................................................................................................................................................................27
DISABLE DHCPBOOTP ........................................................................................................................................................................................29
DISABLE TELNET ...................................................................................................................................................................................................30
ENABLE DHCPBOOTP ..........................................................................................................................................................................................31
ENABLE TELNET .....................................................................................................................................................................................................32
PING ..........................................................................................................................................................................................................................33
PURGE IP ..................................................................................................................................................................................................................34
RESET ASYN ............................................................................................................................................................................................................35
RESET IP ...................................................................................................................................................................................................................36

Table of Contents
2
RESET IP ROUTE .................................................................................................................................................................................................... 37
RESET SYSTEM ....................................................................................................................................................................................................... 38
RESTART REBOOT ................................................................................................................................................................................................ 39
RESTART SWITCH ................................................................................................................................................................................................. 40
SET ASYN ................................................................................................................................................................................................................ 41
SET IP ........................................................................................................................................................................................................................ 42
SET IP ROUTE ......................................................................................................................................................................................................... 44
SET PASSWORD MANAGER .............................................................................................................................................................................. 45
SET PASSWORD OPERATOR ............................................................................................................................................................................. 46
SET SWITCH CONSOLETIMER .......................................................................................................................................................................... 47
SET SYSTEM ............................................................................................................................................................................................................ 48
SET SYSTEM TEMPTHRESHOLD ...................................................................................................................................................................... 49
SHOW ASYN ........................................................................................................................................................................................................... 50
SHOW CONFIG ...................................................................................................................................................................................................... 51
SHOW DHCPBOOTP ............................................................................................................................................................................................ 52
SHOW IP .................................................................................................................................................................................................................. 53
SHOW IP ROUTE ................................................................................................................................................................................................... 54
SHOW SWITCH ...................................................................................................................................................................................................... 55
SHOW SWITCH LINECARD ................................................................................................................................................................................ 56
SHOW SYSTEM ...................................................................................................................................................................................................... 57
Chapter 4
Simple Network Time Protocol (SNTP) Commands .......................................................................................................................... 58
ADD SNTPSERVER IPADDRESS ........................................................................................................................................................................ 59
DELETE SNTPSERVER IPADDRESS .................................................................................................................................................................. 60
DISABLE SNTP ....................................................................................................................................................................................................... 61
ENABLE SNTP ........................................................................................................................................................................................................ 62
RESET SNTP ............................................................................................................................................................................................................ 63
SET DATE ................................................................................................................................................................................................................. 64
SET SNTP ................................................................................................................................................................................................................. 65
SET TIME .................................................................................................................................................................................................................. 66
SHOW SNTP ........................................................................................................................................................................................................... 67
SHOW TIME ............................................................................................................................................................................................................ 68
Chapter 5
SNMP Community Strings and Trap Commands ............................................................................................................................... 69
ADD SNMP COMMUNITY .................................................................................................................................................................................. 70
CREATE SNMP COMMUNITY ............................................................................................................................................................................ 72
DELETE SNMP COMMUNITY ............................................................................................................................................................................ 75
DESTROY SNMP COMMUNITY ........................................................................................................................................................................ 76
DISABLE SNMP ...................................................................................................................................................................................................... 77
DISABLE SNMP AUTHENTICATETRAP ........................................................................................................................................................... 78
DISABLE SNMP COMMUNITY .......................................................................................................................................................................... 79
ENABLE SNMP ....................................................................................................................................................................................................... 80
ENABLE SNMP AUTHENTICATETRAP ............................................................................................................................................................ 81
ENABLE SNMP COMMUNITY ............................................................................................................................................................................ 82
SET SNMP COMMUNITY .................................................................................................................................................................................... 83
SHOW SNMP .......................................................................................................................................................................................................... 85
Chapter 6
Enhanced Stacking Commands .................................................................................................................................................................. 87
ACCESS SWITCH ................................................................................................................................................................................................... 88
EXIT ........................................................................................................................................................................................................................... 90
SET SWITCH STACKMODE ................................................................................................................................................................................. 91
SHOW REMOTELIST ............................................................................................................................................................................................. 92

3
Chapter 7
Port Parameter Commands ..........................................................................................................................................................................93
RESET SWITCH PORT ...........................................................................................................................................................................................94
SET SWITCH PORT ................................................................................................................................................................................................95
SHOW SWITCH PORT ...........................................................................................................................................................................................99
Chapter 8
Port Security Command .............................................................................................................................................................................. 100
SET SWITCH PORT SECURITYMODE ............................................................................................................................................................ 101
Chapter 9
Port Trunking Commands .......................................................................................................................................................................... 104
ADD SWITCH TRUNK ........................................................................................................................................................................................ 105
CREATE SWITCH TRUNK .................................................................................................................................................................................. 106
DELETE SWITCH TRUNK .................................................................................................................................................................................. 108
DESTROY SWITCH TRUNK ............................................................................................................................................................................... 109
SET SWITCH TRUNK .......................................................................................................................................................................................... 110
SHOW SWITCH TRUNK .................................................................................................................................................................................... 111
Chapter 10
Port Mirroring Commands ......................................................................................................................................................................... 112
ADD SWITCH MIRROR ...................................................................................................................................................................................... 113
CREATE SWITCH MIRROR ................................................................................................................................................................................ 114
DELETE SWITCH MIRROR ................................................................................................................................................................................ 115
DESTROY SWITCH MIRROR ............................................................................................................................................................................ 116
DISABLE SWITCH MIRROR .............................................................................................................................................................................. 117
ENABLE SWITCH MIRROR ............................................................................................................................................................................... 118
SET SWITCH MIRROR ........................................................................................................................................................................................ 119
SHOW SWITCH MIRROR .................................................................................................................................................................................. 120
Chapter 11
File System Commands ................................................................................................................................................................................ 121
COPY ...................................................................................................................................................................................................................... 122
CREATE CONFIG ................................................................................................................................................................................................. 123
DELETE FILE ......................................................................................................................................................................................................... 124
RENAME ................................................................................................................................................................................................................ 125
SET CONFIG ......................................................................................................................................................................................................... 126
SHOW FILE ........................................................................................................................................................................................................... 127
Chapter 12
File Download and Upload Commands ............................................................................................................................................... 128
LOAD ...................................................................................................................................................................................................................... 129
UPLOAD ................................................................................................................................................................................................................ 134
Chapter 13
STP Commands ................................................................................................................................................................................................ 137
ACTIVATE STP ..................................................................................................................................................................................................... 138
DISABLE STP ........................................................................................................................................................................................................ 139
ENABLE STP ......................................................................................................................................................................................................... 140
RESET STP ............................................................................................................................................................................................................. 141
SET STP .................................................................................................................................................................................................................. 142
SET STP PORT ...................................................................................................................................................................................................... 145
SHOW STP ............................................................................................................................................................................................................ 147

Table of Contents
4
Chapter 14
RSTP Commands ..............................................................................................................................................................................................148
ACTIVATE RSTP ...................................................................................................................................................................................................149
DISABLE RSTP ......................................................................................................................................................................................................150
ENABLE RSTP .......................................................................................................................................................................................................151
RESET RSTP ...........................................................................................................................................................................................................152
SET RSTP ................................................................................................................................................................................................................153
SET RSTP PORT ....................................................................................................................................................................................................156
SHOW RSTP ..........................................................................................................................................................................................................159
Chapter 15
MSTP Commands ............................................................................................................................................................................................161
ACTIVATE MSTP ..................................................................................................................................................................................................163
ADD MSTP ............................................................................................................................................................................................................164
CREATE MSTP ......................................................................................................................................................................................................165
DELETE MSTP ......................................................................................................................................................................................................166
DESTROY MSTP MSTI ........................................................................................................................................................................................167
DISABLE MSTP ....................................................................................................................................................................................................168
ENABLE MSTP ......................................................................................................................................................................................................169
RESET MSTP .........................................................................................................................................................................................................170
SET MSTP ..............................................................................................................................................................................................................171
SET MSTP CIST .....................................................................................................................................................................................................174
SET MSTP MSTI ...................................................................................................................................................................................................175
SET MSTP MSTIVLANASSOC ..........................................................................................................................................................................177
SET MSTP PORT ..................................................................................................................................................................................................178
SHOW MSTP .........................................................................................................................................................................................................181
Chapter 16
VLANs and Multiple VLAN Commands .................................................................................................................................................183
ADD VLAN ............................................................................................................................................................................................................184
CREATE VLAN ......................................................................................................................................................................................................187
DELETE VLAN .......................................................................................................................................................................................................191
DESTROY VLAN ...................................................................................................................................................................................................194
RESET VLAN .........................................................................................................................................................................................................195
SET SWITCH MANAGEMENTVLAN ...............................................................................................................................................................196
SET SWITCH SWITCHMODE ............................................................................................................................................................................197
SET VLANMODE ..................................................................................................................................................................................................198
SHOW VLAN .........................................................................................................................................................................................................200
Chapter 17
GARP VLAN Registration Protocol Commands .................................................................................................................................201
DISABLE GARP ....................................................................................................................................................................................................202
ENABLE GARP ......................................................................................................................................................................................................203
RESET GARP .........................................................................................................................................................................................................204
SET GARP PORT ..................................................................................................................................................................................................205
SET GARP TIMER .................................................................................................................................................................................................207
SHOW GARP .........................................................................................................................................................................................................209
SHOW GARP COUNTER ....................................................................................................................................................................................210
SHOW GARP DATABASE ..................................................................................................................................................................................212
SHOW GARP GIP .................................................................................................................................................................................................213
SHOW GARP MACHINE ....................................................................................................................................................................................214
Chapter 18
MAC Address Table Commands ...............................................................................................................................................................215
ADD SWITCH FDB ..............................................................................................................................................................................................216
DELETE SWITCH FDB ........................................................................................................................................................................................218

5
SET SWITCH AGINGTIMER .............................................................................................................................................................................. 219
SHOW SWITCH FDB .......................................................................................................................................................................................... 220
Chapter 19
IGMP Snooping Commands ....................................................................................................................................................................... 222
SET IP IGMP .......................................................................................................................................................................................................... 223
SHOW IP IGMP .................................................................................................................................................................................................... 225
Chapter 20
Statistics Commands ..................................................................................................................................................................................... 226
RESET SWITCH COUNTER ............................................................................................................................................................................... 227
RESET SWITCH LINECARD COUNTER .......................................................................................................................................................... 228
RESET SWITCH PORT COUNTER ................................................................................................................................................................... 229
SHOW SWITCH COUNTER ............................................................................................................................................................................... 230
SHOW SWITCH LINECARD COUNTER ......................................................................................................................................................... 231
SHOW SWITCH PORT COUNTER ................................................................................................................................................................... 232
Chapter 21
Web Server Commands ............................................................................................................................................................................... 233
DISABLE HTTP SERVER ..................................................................................................................................................................................... 234
ENABLE HTTP SERVER ...................................................................................................................................................................................... 235
RESET HTTP SERVER .......................................................................................................................................................................................... 236
SET HTTP SERVER ............................................................................................................................................................................................... 237
Creating a Self-Signed Certificate ...................................................................................................................................................... 238
Creating a CA Certificate ....................................................................................................................................................................... 239
SHOW HTTP SERVER ......................................................................................................................................................................................... 241
Chapter 22
Encryption Commands ................................................................................................................................................................................. 242
CREATE ENCO KEY ............................................................................................................................................................................................. 243
DESTROY ENCO KEY ......................................................................................................................................................................................... 246
SET ENCO KEY ..................................................................................................................................................................................................... 247
SHOW ENCO KEY ............................................................................................................................................................................................... 248
Chapter 23
Public Key Infrastructure (PKI) Commands ........................................................................................................................................249
ADD PKI CERTIFICATE ...................................................................................................................................................................................... 250
CREATE PKI CERTIFICATE ................................................................................................................................................................................ 252
CREATE PKI ENROLLMENTREQUEST ........................................................................................................................................................... 254
DELETE PKI CERTIFICATE ................................................................................................................................................................................. 256
PURGE PKI ............................................................................................................................................................................................................ 257
SET PKI CERTIFICATE ........................................................................................................................................................................................ 258
SET PKI CERTSTORELIMIT ................................................................................................................................................................................ 260
SET SYSTEM DISTINGUISHEDNAME ............................................................................................................................................................ 261
SHOW PKI ............................................................................................................................................................................................................. 262
SHOW PKI CERTIFICATE ................................................................................................................................................................................... 263
Chapter 24
Secure Sockets Layer (SSL) Commands ............................................................................................................................................... 264
SET SSL .................................................................................................................................................................................................................. 265
SHOW SSL ............................................................................................................................................................................................................ 266
Chapter 25
Secure Shell (SSH) Commands .................................................................................................................................................................267
DISABLE SSH SERVER ....................................................................................................................................................................................... 268
ENABLE SSH SERVER ......................................................................................................................................................................................... 269

Table of Contents
6
SET SSH SERVER ..................................................................................................................................................................................................270
Creating a Secure Shell Server ............................................................................................................................................................ 271
SHOW SSH ............................................................................................................................................................................................................273
Chapter 26
802.1x Port-Based Access Control Commands .................................................................................................................................274
DISABLE PORTACCESS .....................................................................................................................................................................................275
ENABLE PORTACCESS ......................................................................................................................................................................................276
SET PORTACCESS ...............................................................................................................................................................................................277
SET PORTACCESS PORT AUTHENTICATOR ...............................................................................................................................................278
SET PORTACCESS PORT ROLE .......................................................................................................................................................................280
SET PORTACCESS PORT SUPPLICANT .........................................................................................................................................................281
SHOW PORTACCESS .........................................................................................................................................................................................283
Chapter 27
TACACS+ and RADIUS Commands .........................................................................................................................................................284
ADD RADIUSSERVER .........................................................................................................................................................................................285
ADD TACACSSERVER ........................................................................................................................................................................................286
DELETE RADIUSSERVER ...................................................................................................................................................................................287
DELETE TACACSSERVER ..................................................................................................................................................................................288
DISABLE AUTHENTICATION ...........................................................................................................................................................................289
ENABLE AUTHENTICATION ............................................................................................................................................................................290
RESET AUTHENTICATION ................................................................................................................................................................................291
SET AUTHENTICATION .....................................................................................................................................................................................292
SHOW AUTHENTICATION ...............................................................................................................................................................................294
Index .......................................................................................................................................................................................................................295

7
Preface
This guide contains information about the AT-S60 command line
interface. The commands for both the AT-S60 version 2.0.0 NE and 2.0.0
software are included in this manual.
This chapter discusses the following topics:
❑How This Guide is Organized on page 7
❑Document Conventions on page 10
❑Where to Find Web-based Guides on page 11
❑Contacting Allied Telesyn on page 12
❑Obtaining Management Software Updates on page 13
How This Guide is Organized
This section describes the organization of the chapters and provides
information about the security features covered in this manual.
The commands are grouped by topic into the following chapters:
❑Chapter 1: Starting a Command Line Management Session
❑Chapter 2: Basic Command-Line Commands
❑Chapter 3: Basic Switch Commands
❑Chapter 4: Simple Network Time Protocol (SNTP) Commands
❑Chapter 5: SNMP Community Strings and Trap Commands
❑Chapter 6: Enhanced Stacking Commands

Preface
8
❑Chapter 7: Port Parameter Commands
❑Chapter 8: Port Security Command
❑Chapter 9: Port Trunking Commands
❑Chapter 10: Port Mirroring Commands
❑Chapter 11: File System Commands
❑Chapter 12: File Download and Upload Commands
❑Chapter 13: STP Commands
❑Chapter 14: RSTP Commands
❑Chapter 15: MSTP Commands
❑Chapter 16: VLANs and Multiple VLAN Commands
❑Chapter 17: GARP VLAN Registration Protocol Commands
❑Chapter 18: MAC Address Table Commands
❑Chapter 19: IGMP Snooping Commands
❑Chapter 20: Statistics Commands
❑Chapter 21: Web Server Commands
❑Chapter 22: Encryption Commands
❑Chapter 23: Public Key Infrastructure (PKI) Commands
❑Chapter 24: Secure Sockets Layer (SSL) Command
❑Chapter 25: Secure Shell (SSH) Commands
❑Chapter 26T: 802.1x Port-based Access Control Commands
❑Chapter 27: TACACS+ and RADIUS Commands
The first page of each chapter lists the commands that appear in the
chapter. Within each chapter, the commands are listed alphabetically.

AT-S60 Command Line User’s Guide
9
Security
Features
As mentioned above, the commands for both the AT-S60 version
2.0.0 NE and 2.0.0 software are included in this manual. There are several
chapters that contain security information for the AT-S60 version 2.0.0
software. They are:
❑Chapter 21: Web Server Commands
❑Chapter 22: Encryption Commands
❑Chapter 23: Public Key Infrastructure (PKI) Commands
❑Chapter 24: Secure Sockets Layer (SSL) Command
❑Chapter 25: Secure Shell (SSH) Commands
❑Chapter 26: 802.1x Port-based Access Control Commands
❑Chapter 27: TACACS+ and RADIUS Commands
The chapters listed above describe the advanced security and
authentication features. The Web Server Chapter contains features that
appear in both versions of the software as well as features that only
appear in the AT-S60 version 2.0.0 software. The Encryption Services,
Public Key Infrastructure (PKI), Secure Socket Layer (SSL), and Secure
Shell (SSH) features only appear in the AT-S60 version 2.0.0 software.
The authentication features, 802.1x Port Based Access Control as well as
TACACS+ and RADIUS protocols, appear in both the AT-S60 version
2.0.0 NE and 2.0.0 software.
Caution
The software described in this documentation contains certain
cryptographic functionality and its export is restricted by U.S. law. As
of this writing, it has been submitted for review as a “retail
encryption item” in accordance with the Export Administration
Regulations, 15 C.F.R. Part 730-772, promulgated by the U.S.
Department of Commerce, and conditionally may be exported in
accordance with the pertinent terms of License Exception ENC
(described in 15 C.F.R. Part 740.17). In no case may it be exported to
Cuba, Iran, Iraq, Libya, North Korea, Sudan, or Syria. If you wish to
transfer this software outside the United States or Canada, please
contact your local Allied Telesyn sales representative for current
information on this product’s export status.

Preface
10
Document Conventions
This document uses the following conventions:
Note
Notes provide additional information.
Warning
Warnings inform you that performing or omitting a specific action
may result in bodily injury.
Caution
Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.

AT-S60 Command Line User’s Guide
11
Where to Find Web-based Guides
The installation and user guides for all Allied Telesyn products are
available in Portable Document Format (PDF) from on our web site at
www.alliedtelesyn.com. You can view the documents on-line or
download them onto a local workstation or server.

Preface
12
Contacting Allied Telesyn
This section provides Allied Telesyn contact information for technical
support as well as sales or corporate information.
Online Support You can request technical support online by accessing the Allied Telesyn
Knowledge Base from the following web site: kb.alliedtelesyn.com.
You can use the Knowledge Base to submit questions to our technical
support staff and review answers to previously asked questions.
Email and
Telephone
Support
For Technical Support via email or telephone, refer to the Support &
Services section of the Allied Telesyn web site: www.alliedtelesyn.com.
For Sales or
Corporate
Information
You can contact Allied Telesyn for sales or corporate information at our
web site: www.alliedtelesyn.com. To find the contact information for
your country, select Contact Us then Worldwide Contacts.

AT-S60 Command Line User’s Guide
13
Obtaining Management Software Updates
New releases of management software for our managed products can
be downloaded from either of the following Internet sites:
• the Allied Telesyn web site: http://www.alliedtelesyn.com
• the Allied Telesyn FTP server: ftp://ftp.alliedtelesyn.com
To use the FTP server, go to the above web site. Then login to the FTP
server by entering “anonymous” for the user name and your email
address for the password.

14
Chapter 1
Starting a Command Line
Management Session
This chapter contains the following topics:
❑Starting a Management Session on page 15
❑Command Line Interface Features on page 16
❑Command Formatting on page 17

AT-S60 Command Line User’s Guide
15
Starting a Management Session
In order to manage an AT-8400 Series switch using the command line,
you must first start a local or Telnet management session. For
instructions, refer to the AT-S60 Software Management User’s Guide.
Once you have started a local or Telnet management session, you will
see the AT-S60 Main Menu, which contains the following option:
C - Command Line Interface
Type C to display the command line prompt. The prompt will differ
depending on whether you logged in as Manager or Operator. If you
logged in as Manager, you will see a pound sign “#.” If you logged in as
Operator, you will see a dollar sign “$.” You can now manage the switch
with the command line commands.
Note
The command line interface is not supported by a Web browser
management session.

Chapter 1: Starting a Command Line Management Session
16
Command Line Interface Features
The following features are supported in the command line interface:
❑Command history - Use the up and down arrow keys.
❑Context-specific help - Press the question mark key at any time to
see a list of legal next parameters.
❑Keyword abbreviations - Any keyword can be recognized by
typing an unambiguous prefix (for example, “sh” for “show”).

AT-S60 Command Line User’s Guide
17
Command Formatting
The following formatting conventions are used in this manual:
❑screen text font - This font illustrates the format of a
command and command examples.
❑screen text font - Italicized screen text indicates a variable
for you to enter.
❑[ ] - Brackets indicate optional parameters.
❑| - bar symbol separates parameter options for you to choose
from.
Specifying Ports Many commands in this manual require you to specify the port where
you want the command performed. Port numbers are entered in the
following format:
slot.port
Slot is the number of the slot in the AT-8400 Series switch containing the
line card. The AT-8400 Chassis has 12 slots for line cards. Port is the port
number on the line card. For instance, to indicate Port 4 on a line card in
Slot 8, enter:
8.4
For example, to view the parameter settings for the above port, enter:
show switch port=8.4
Some commands allow you to specify more then one port at a time.
Ports on the same line card can be listed individually, as a range, or both.
The following example displays the port parameters for Ports 1, 3, and 5
through 8 on the line card in Slot 3:
show switch port=3.1,3,5-8
Some commands can be performed on ports on different line cards
simultaneously. This example displays the port parameters for Ports 1
and 4 on the line card in Slot 4 and Ports 6 to 8 on the line card in Slot 11:
show switch port=4.1,4,11.6-8

Chapter 1: Starting a Command Line Management Session
18
Note
The AT-8413 G/BT line card comes with one 10/100/1000Base-T
twisted pair port and one GBIC expansion slot. Only one port is
active on the line card at a time. The port number for the active port
is always 1. You cannot display or modify the settings of the inactive
port.