Posts Tagged ‘parser’


As we well know, one of the best features of Cisco IOS is the parser’s context sensitive help and tab-completion when typing in configuration or verification commands. One of the lesser known features related to this, however, is the ability to view all officially supported commands available in the parser on a per-mode basis on the CLI via the show parser dump command.

show parser dump lists all commands in exec mode, global configuration mode, route-map mode, etc. prefixed by the privilege level of the command. This includes the negation (e.g. “no router rip”) and the default (e.g. “default interface”) in addition to the actual command and its arguments. The advantage of this output is that you can quickly find the complete syntax for a command, or set of commands, just by filtering through the parser dump.

For example let’s take a look at the output of the “show parser dump route-map”, which shows us all commands under the route-map subconfiguration mode.

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