Python/ifconfig: T1557: ethernet: support changing flow control

Ethernet flow control can be set by set_flow_control() which enables/disables
generation of pause frames.

1 files changed, 19 insertions, 0 deletions

diff --git a/python/vyos/ifconfig.py b/python/vyos/ifconfig.py
index 9b37fdbff..9310ee278 100644
--- a/python/vyos/ifconfig.py
+++ b/python/vyos/ifconfig.py
@@ -1073,6 +1073,25 @@ class EthernetIf(VLANIf):
     def remove(self):
         raise OSError('Ethernet interfaces can not be removed')
 
+    def set_flow_control(self, enable):
+        """
+        Changes the pause parameters of the specified Ethernet device.
+
+        @param enable: true -> enable pause frames, false -> disable pause frames
+        """
+        if enable not in ['on', 'off']:
+            raise ValueError("Value out of range")
+
+        # Assemble command executed on system. Unfortunately there is no way
+        # to change this setting via sysfs
+        cmd = 'ethtool --pause {0} autoneg {1} tx {1} rx {1}'.format(
+              self._ifname, enable)
+        try:
+            # An exception will be thrown if the settings are not changed
+            self._cmd(cmd)
+        except CalledProcessError:
+            pass
+
 
 class BondIf(VLANIf):
     """