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4 / 4 / 1 Регистрация: 03.09.2014 Сообщений: 156 |
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16.06.2017, 10:37. Показов 32310. Ответов 4
Всем доброго времени суток, Начал изучение CCNA. Сейчас выполняю лабораторую работу и столкнулся с такой проблемой: По заданию нужно сконфигурировать простенькую сетку. Когда открываю лабору в Packet Tracer и пытаюсь открыть меню любого и коммутаторов, мне выдаёт сообщение о том, что настройка залочена (Configure is locked). То есть, скорфигурировать коммутаторы я не могу, потому как доступа к ним у меня нет. Быть может, кто-нибудь сталкивался с такой же проблемой и знает решение, как получить доступ? Приложил скриншот и саму лабору. Миниатюры
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711 / 404 / 116 Регистрация: 20.04.2014 Сообщений: 1,057 |
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16.06.2017, 12:25 |
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Вы открыли pka-файл — это готовая лаба со своим сценарием, условиями выполнения и, возможно, ограничением времени. Хочется поиграться — собирайте топологию самостоятельно (она, судя по рисунку, проще некуда) — и будет всевозможный доступ.
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4 / 4 / 1 Регистрация: 03.09.2014 Сообщений: 156 |
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16.06.2017, 12:44 [ТС] |
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Я так и сделал, создал и настроил свою топологию. Просто не сталкивался ещё с такими вещами, чтоб доступа не было к устройствам. Просто зачем тогда студентам давать pka-файл, можно ведб просто написать,чтоб создали определённую топологию
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711 / 404 / 116 Регистрация: 20.04.2014 Сообщений: 1,057 |
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16.06.2017, 13:07 |
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Просто зачем тогда студентам давать pka-файл, можно ведб просто написать,чтоб создали определённую топологию Затем и давать, чтобы шли не простейшим и очевиднейшим путем, а демонстрировали некие навыки. Это же контрольная лаба, фактически. Контроль времени есть? Автоматическая проверка правильности выполнения есть? Чего же еще для обучения надо?
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4 / 4 / 1 Регистрация: 03.09.2014 Сообщений: 156 |
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20.06.2017, 14:32 [ТС] |
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Всё оказалось ещё проще. Я просто совершенно забыл,что Packet Tracer позволяет создавать эмуляцию физической сети, а потому из головы совершенно вылетело, что достаточно было к каждому коммутатору добавить консольное соединение, как, если бы я физически находился рядом с ними. После добавления я успешно через терминал получил доступ к обоим коммутаторвм и смог их должным образом настроить. Миниатюры
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IT_Exp Эксперт 87844 / 49110 / 22898 Регистрация: 17.06.2006 Сообщений: 92,604 |
20.06.2017, 14:32 |
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Помогаю со студенческими работами здесь Cisco Packet Tracer cisco packet tracer Cisco Packet Tracer Cisco Packet Tracer Искать еще темы с ответами Или воспользуйтесь поиском по форуму: 5 |
Exclusive Configuration Change Access and Access Session Locking
Exclusive Configuration Change Access (also called the “Configuration Lock” feature) allows you to have exclusive change
access to the Cisco IOS XE running configuration, preventing multiple users from making concurrent configuration changes.
The Access Session Locking addition to this feature extends the Exclusive Configuration Change Access feature such that
show and
debug commands entered by the user holding the configuration lock always have execution priority;
show and
debug commands entered by other users are only allowed to run after the processes initiated by the configuration lock owner have
finished.
The Exclusive Configuration Change Access feature (“exposed lock”) is complementary with the locking mechanism in the Configuration
Replace and Configuration Rollback feature (“rollback lock”).
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information,
see Bug Search Tool and 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 table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature
Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About Locking the Configuration
Exclusive Configuration
Change Access and Access Session Locking
Devices running Cisco
IOS software maintain a running configuration that determines the configuration
state of the device. Changes to the running configuration alter the behavior of
the device. Because Cisco IOS software allows multiple users to change the
running configuration via the device CLI (including the device console and
telnet Secure Shell (SSH)), in some operating environments it would be
beneficial to prevent multiple users from making concurrent changes to the
Cisco IOS running configuration. Temporarily limiting access to the Cisco IOS
running configuration prevents inadvertent conflicts or cases where two users
attempt to configure the same portion of the running configuration.
The Exclusive
Configuration Change Access feature (also called the “Configuration Lock”
feature) allows you to have exclusive change access to the Cisco IOS running
configuration, preventing multiple users from making concurrent configuration
changes.
This feature provides
exclusive change access to the Cisco IOS running configuration from the time
you enter global configuration mode by using the
configure
terminal command. This gives the effect of a
“configuration lock,” preventing other users from changing the Cisco IOS
running configuration. The configuration lock is automatically released when
the user exits Cisco IOS configuration mode.
The Exclusive
Configuration Change Access feature is enabled using the
configuration
mode
exclusive command in global configuration mode.
Exclusive configuration change access can be set to
auto , so that
the Cisco IOS configuration mode is locked whenever anyone uses the
configure
terminal command, or it can be set to
manual , so that
the Cisco IOS configuration mode is locked only when the
configure
terminal
lock command is issued.
The Exclusive
Configuration Change Access feature is complementary with the locking mechanism
for the Configuration Replace and Configuration Rollback feature introduced in
Cisco IOS Release 12.2(25)S and 12.3(7)T.
Access Session
Locking
The Access Session
Locking feature extends the Exclusive Configuration Change Access feature such
that
show and
debug commands
entered by the user holding the configuration lock always have execution
priority. This feature prevents concurrent configuration access and also
provides an option to prevent simultaneous processes, such as a
show command
entered by another user, from executing while other configuration commands are
being executed. When this feature is enabled, the commands entered by the user
with the configuration lock (such as configuration commands) always have
priority over commands entered by other users.
How to Configure Configuration Exclusive Confguration Change-Access and Access Session Locking
Enabling Exclusive
Configuration Change Access and Access Session Locking
 Note |
Effective with |
Perform this task to enable the Exclusive Configuration Change
Access and Access Session Locking feature.
SUMMARY STEPS
-
enable -
configure
terminal
-
configuration
mode
exclusive
-
end
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
Example: |
Enables
|
| Step 2 |
Example: |
Enters global |
| Step 3 |
Example: |
Enables
|
| Step 4 |
Example: |
Ends your |
Obtaining Exclusive
Configuration Change Access
SUMMARY STEPS
-
enable -
configure
terminal
-
configure
terminal
lock
- Configure the
system by entering your changes to the running configuration. - Do one of the
following: -
end
- or
-
exit
DETAILED STEPS
| Command or Action | Purpose | |||
|---|---|---|---|---|
| Step 1 |
Example: |
Enables
|
||
| Step 2 |
Example: |
Enters global |
||
| Step 3 |
Example: |
(Optional)
|
||
| Step 4 |
Configure the |
— |
||
| Step 5 |
Do one of the
Example:Example:Example: |
Ends your
|
Monitoring and
Troubleshooting Configuration Locking
Perform either or
both steps in this task to monitor or troubleshoot the Exclusive Configuration
Change Access and Access Session Locking feature.
SUMMARY STEPS
-
show
configuration
lock
-
debug
configuration
lock
DETAILED STEPS
| Step 1 |
Use this If you cannot Example: |
| Step 2 |
Use this Example: |
Configuration Examples for Locking the Configuration
Configuring an Exclusive Lock
in Auto Mode Example
The following
example shows how to enable the exclusive lock in auto mode for single-user
auto configuration mode using the
configuration mode exclusive command. Once the Cisco IOS
configuration file is locked exclusively, you can verify this configuration by
using the
show configuration lock command.
Router# configure terminal
Router(config)#
Router(config)# exit
Router# configure terminal
! Locks configuration mode exclusively.
Router# show configuration lock
Parser Configure Lock
Owner PID : 10
User : User1
TTY : 3
Type : EXCLUSIVE
State : LOCKED
Class : Exposed
Count : 0
Pending Requests : 0
User debug info : 0 Configuring an Exclusive Lock
in Manual Mode Example
Additional References
The following sections provide references related to locking the configuration.
Related Documents
|
Related Topic |
Document Title |
|---|---|
|
Commands for managing configuration files |
Cisco IOS Configuration Management Command Reference |
|
Information about managing configuration files |
Managing Configuration Files |
Standards
|
Standard |
Title |
|---|---|
|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this |
— |
MIBs
|
MIB |
MIBs Link |
|---|---|
|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at http://www.cisco.com/go/mibs |
RFCs
|
RFC |
Title |
|---|---|
|
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature. |
— |
Technical Assistance
|
Description |
Link |
|---|---|
|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and To receive security and technical information about your products, you can subscribe to various services, such as the Product Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
http://www.cisco.com/techsupport |
Feature Information for Exclusive Configuration Change Access and Access Session Locking
The following table provides release information about the feature or features described in this module. This table lists
only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise,
subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco
Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
|
Feature Name |
Releases |
Feature Information |
|---|---|---|
|
Exclusive Configuration Change Access and Access Session Locking |
12.3(14)T 12.0(31)S 12.2(33)SRA 12.4(11)T 12.2(33)SXH 12.2(33)SB |
The Exclusive Configuration Change Access feature (also called the “Configuration Lock” feature) allows you to have exclusive The Access Session Locking addition to this feature extends the Exclusive Configuration Change Access feature such that The Exclusive Configuration Change Access feature is complementary with the locking mechanism for the Configuration Replace The Configuration Lock feature feature was integrated into Release 12.0S, and the Access Session Locking feature extension The extended feature was integrated into Releases 12.2(33)SRA, 12.4(11)T, 12.2(33)SXH, and 12.2(33)SB. The following sections provide information about this feature:
The following commands were introduced or modified: |
|
Parser Concurrency and Locking Improvements |
12.2(33)SRE 15.1(1)T |
The Parser Concurrency and Locking Improvements feature provides a common interface that ensures that exclusive access is The following sections provide information about this feature:
The following commands were introduced or modified: |
Locking Configuration Access
Problem
You want to prevent multiple concurrent users from
making configuration changes at the same time.
Solution
To automatically prevent other users from making configuration
changes at the same time as you, use the following command:
Router1#configure terminalEnter configuration commands, one per line. End with CNTL/Z. Router1(config)#configuration mode exclusive autoRouter1(config)#endRouter1#
To enable the ability to lock the configuration file, on an
as-needed basis, use the following command:
Router1#configure terminalEnter configuration commands, one per line. End with CNTL/Z. Router1(config)#configuration mode exclusive manualRouter1(config)#endRouter1#
Tip
This feature was introduced in IOS Version 12.3(14)T.
Discussion
By default, the router running IOS software allows multiple
concurrent users to change the running configuration files at once. In
some operating environments, preventing multiple concurrent users from
making changes is beneficial. Being able to prevent two users
attempting to modify the same portion of the configuration file is
desired. By enabling this feature, you temporarily prevent multiple
users from modifying the router configuration at the same time.
Essentially, this feature allows only a single user to enter the
configuration mode at a time. All other users on the router are
effectively locked out of the configuration mode until the first user
exits it. As we’ve seen in our examples, this feature runs in two
modes, auto and manual. In auto mode, the configuration mode is
automatically locked each time a user enters the configuration mode.
In manual mode, users have the ability to manually lock the
configuration mode each time they change the router configuration by
using the lock keyword:
Router1#configure terminal lock
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#
If you don’t issue the lock
keyword, then the router will not lock the configuration mode and the
router will function as normal. In auto mode, you don’t need to issue
the lock keyword, since it is
implicitly enabled.
If you attempt to enter the configuration mode and someone has
already locked it, then you will receive the following message
informing you that the configuration mode is locked and by
whom:
Router1#configure terminal
Configuration mode locked exclusively by user 'ijbrown' process '31' from terminal '162'. Please try later.
Router1#
You can always show the status of the configuration lock by
issuing the following command:
Router1#show configuration lockParser Configure Lock --------------------- Owner PID : 31 User :ijbrownTTY :162Type : EXCLUSIVE State : LOCKED Class : EXPOSED Count : 1 Pending Requests : 0 User debug info : configure terminal lock Router1#
If you absolutely need to change the router configuration and
someone has locked you out, then you always have the option of
terminating his or her session. Notice that user ijbrown has currently locked the
configuration mode, and he is using TTY 162.
In the next example, we will clear the TTY session and view the status
of the configuration lock:
Router1#clear line[confirm]162<enter>[OK] Router1#show configuration lockParser Configure Lock --------------------- Owner PID : -1 User : unknown TTY : -1 Type : NO LOCK State :FREEClass : unknown Count : 0 Pending Requests : 0 User debug info : Router1#
Notice that once we clear the user’s session, the lock is
removed and we are then free to make configuration changes. In
addition, once someone does lock the configuration mode, a system
message is sent to inform all other users:
Sep 2 22:39:03.304 EDT: Configuration mode locked exclusively. The lock will be cleared once you exit out of configuration mode using end/exit
Oct 25, 2011
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[code]….
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