Exclusive Configuration Change Access and Access Session Locking
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12.3(14)T 12.0(31)S 12.2(33)SRA 12.4(11)T 12.2(33)SXH 12.2(33)SB
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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.
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 allowed to run only after the processes initiated by the configuration lock owner have finished.
The Exclusive Configuration Change Access feature is complementary with the locking mechanism for the Configuration Replace and Configuration Rollback feature (“rollback lock”).
The Configuration Lock feature feature was integrated into Release 12.0S, and the Access Session Locking feature extension was implemented. The
configuration
mode
exclusivecommand was extended to include the following keyword options:
config_wait,
expire,
interleave,
lock-show,
retry_wait, and
terminate. The output of the
show
configuration
lockcommand was improved.
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:
clear
configuration
lock,
configuration
mode
exclusive, and
configure
terminal
lock.
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Parser Concurrency and Locking Improvements
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12.2(33)SRE
15.1(1)T
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The Parser Concurrency and Locking Improvements feature provides a common interface that ensures that exclusive access is granted to the requested process and prevents others from concurrently accessing the Cisco IOS configuration. It allows access only to the user holding the lock and prevents other clients from accessing the configuration.
The following sections provide information about this feature:
The following commands were introduced or modified:
parser
command
serializer and
test
parser
session-lock.
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