Python/ifconfig: T1557: query driver if it supports auto negotiation

1 files changed, 18 insertions, 0 deletions

diff --git a/python/vyos/ifconfig.py b/python/vyos/ifconfig.py
index 9e6c27430..cbedcc86e 100644
--- a/python/vyos/ifconfig.py
+++ b/python/vyos/ifconfig.py
@@ -1085,6 +1085,24 @@ class EthernetIf(VLANIf):
         link = os.readlink('/sys/class/net/{}/device/driver/module'.format(self._ifname))
         return os.path.basename(link)
 
+    def has_autoneg(self):
+        """
+        Not all drivers support autonegotiation.
+
+        returns True -> Autonegotiation is supported by driver
+                False -> Autonegotiation is not supported by driver
+        """
+        regex = 'Supports auto-negotiation:[ ]\w+'
+        tmp = self._cmd('/sbin/ethtool {}'.format(self._ifname))
+        tmp = re.search(regex, tmp.decode())
+
+        # Output is either 'Supports auto-negotiation: Yes' or
+        # 'Supports auto-negotiation: No'
+        if tmp.group().split(':')[1].lstrip() == "Yes":
+            return True
+        else:
+            return False
+
     def set_flow_control(self, enable):
         """
         Changes the pause parameters of the specified Ethernet device.