Merge pull request #4779 from natali-rs1985/T7800

T7800: VPP: Bonding interface fails when change vpp configuration

Author: sever-sever

python/vyos/vpp/interface/bond.py

@@ -116,3 +116,7 @@ def kernel_delete(self):
             a.kernel_delete()
         """
         self.vpp.lcp_pair_del(self.ifname, self.kernel_interface)
+
+    def lcp_pair_exists(self):
+        """Check if LCP pair exists"""
+        return bool(self.vpp.lcp_pair_find(self.kernel_interface))

src/conf_mode/vpp_interfaces_bonding.py

@@ -195,7 +195,7 @@ def apply(config):
         for member in members:
             i.detach_member(interface=member)
 
-        if 'kernel_interface' in config['effective']:
+        if 'kernel_interface' in config['effective'] and i.lcp_pair_exists():
             i.kernel_delete()
         # Delete bonding interface
         i.delete()