labgrid/driver/power: add poe-mib backend

The PoE MiB backend uses SNMP enable and disable PoE on a switch port.
Compatibility was tested on a Cisco CBS350.

Signed-off-by: Rouven Czerwinski <[email protected]>

doc/configuration.rst

@@ -233,6 +233,9 @@ Currently available are:
  Controls TP-Link power strips via `python-kasa
  <https://github.com/python-kasa/python-kasa>`_.
 
+``poe-mib``
+ Controls PoE switches using the PoE SNMP administration MiBs.
+
 Used by:
  - `NetworkPowerDriver`_
 

labgrid/driver/power/poe-mib.py

@@ -0,0 +1,27 @@
+""" tested with Cisco CBS350, should be compatible with switches implementing the PoE administration MiB"""
+
+from ..exception import ExecutionError
+from ...util.snmp import SimpleSNMP
+
+OID = "1.3.6.1.2.1.105.1.1.1.3.1"
+
+def power_set(host, port, index, value):
+ _snmp = SimpleSNMP(host, 'private')
+ outlet_control_oid = "{}.{}".format(OID, index)
+
+ oid_value = "1" if value else "2"
+
+ _snmp.set(outlet_control_oid, oid_value)
+
+def power_get(host, port, index):
+ _snmp = SimpleSNMP(host, 'private')
+ output_status_oid = "{}.{}".format(OID, index)
+
+ value = _snmp.get(output_status_oid)
+
+ if value == 1: # On
+ return True
+ if value == 2: # Off
+ return False
+
+ raise ExecutionError("failed to get SNMP value")

tests/test_powerdriver.py

@@ -265,3 +265,7 @@ def test_import_backend_tplink(self):
  def test_import_backend_siglent(self):
  pytest.importorskip("vxi11")
  import labgrid.driver.power.siglent
+
+ def test_import_backend_poe_mib(self):
+ pytest.importorskip("pysnmp")
+ import labgrid.driver.power.poe-mib