AutomationPrivileged EXEC

show restconf-yang capabilities

Displays the list of YANG data models and capabilities supported by the device's RESTCONF interface, used to verify RESTCONF compatibility and available modules for automation.

Syntax·Privileged EXEC

show restconf-yang capabilities

When to Use This Command

Checking which YANG modules are supported before writing a RESTCONF script to configure OSPF.
Verifying that a specific YANG model (e.g., ietf-interfaces) is available after upgrading IOS.
Troubleshooting a RESTCONF API call that fails due to unsupported module.
Auditing device capabilities for compliance with network automation standards.

Command Examples

Basic capability listing

show restconf-yang capabilities

Capabilities:
    urn:ietf:params:restconf:capability:defaults:1.0?basic-mode=report-all
    urn:ietf:params:restconf:capability:depth:1.0
    urn:ietf:params:restconf:capability:fields:1.0
    urn:ietf:params:restconf:capability:filter:1.0
    urn:ietf:params:restconf:capability:replay:1.0
    urn:ietf:params:restconf:capability:start-time:1.0
    urn:ietf:params:restconf:capability:with-defaults:1.0
    urn:ietf:params:xml:ns:yang:ietf-ip?module=ietf-ip&revision=2018-02-22
    urn:ietf:params:xml:ns:yang:ietf-interfaces?module=ietf-interfaces&revision=2018-02-20
    urn:ietf:params:xml:ns:yang:ietf-routing?module=ietf-routing&revision=2018-03-13
    urn:ietf:params:xml:ns:yang:ietf-ospf?module=ietf-ospf&revision=2019-05-21
    urn:ietf:params:xml:ns:yang:ietf-bgp?module=ietf-bgp&revision=2019-01-25

Each line shows a capability URI. Lines with 'module=' indicate supported YANG modules. The 'revision=' shows the specific version. For example, 'ietf-interfaces' with revision 2018-02-20 is available.

Filtering for a specific module

show restconf-yang capabilities | include ietf-interfaces

urn:ietf:params:xml:ns:yang:ietf-interfaces?module=ietf-interfaces&revision=2018-02-20

The output is filtered to show only lines containing 'ietf-interfaces'. This confirms the module is supported with the given revision.

Understanding the Output

The output lists all RESTCONF capabilities as URIs. Each URI represents a feature or YANG module. Lines containing 'module=' indicate a YANG data model; the module name and revision are key. For automation, you need the exact module name and revision to construct RESTCONF URLs. If a required module is missing, the device cannot be managed via RESTCONF for that feature. The 'capability:' lines (e.g., depth, filter) are standard RESTCONF features that should always be present. Watch for missing modules when upgrading IOS; some modules may be removed or added.

CCNA Exam Tips

CCNA exam may ask which command verifies YANG module support for RESTCONF.

Remember that 'show restconf-yang capabilities' is a privileged EXEC command, not config mode.

The output includes revision dates; exam might test that different revisions affect compatibility.

Know that 'ietf-interfaces' is a common YANG module for interface configuration.

Common Mistakes

Mistake: Using 'show restconf capabilities' (missing 'yang') — command will fail.

Mistake: Assuming all YANG modules are supported; always verify with this command.

Mistake: Ignoring revision dates; using wrong revision in RESTCONF URL causes errors.

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