Executing the following operational command results in a Python traceback instead of displaying the DHCPv6 server leases:

show dhcpv6 server leases

Actual Behavior

The command terminates with the following exception:

File "/usr/lib/python3/dist-packages/vyos/kea.py", line 665, in kea_get_server_leases

data_lease['state'] = lease_state_long[lease['state']]

KeyError: 4

Expected Behavior

The command should successfully display all DHCPv6 server leases without throwing an exception.

Technical Details

The exception occurs in vyos/kea.py, inside the kea_get_server_leases() function.

The code attempts to map the lease state returned by Kea to a human-readable state using lease_state_long. However, the returned state value (4) is not present in the mapping dictionary.

This appears to be a missing lease state mapping or an incompatibility between the Kea lease state values and VyOS's internal state mapping.

Suggested Fix

Consider handling unknown lease states gracefully or extending lease_state_long to include all valid Kea DHCPv6 lease states.

Impact

The operational command for displaying DHCPv6 server leases is unusable when a lease with an unmapped state is encountered.