lldp: T1898: support multiple management addresses

- management-address is not a <multi/> node
- added new vyos.validate.is_loopback_addr() function - returns true is address
  passed is a looback address

1 files changed, 6 insertions, 0 deletions

diff --git a/python/vyos/validate.py b/python/vyos/validate.py
index 3f3166022..1ce5a8467 100644
--- a/python/vyos/validate.py
+++ b/python/vyos/validate.py
@@ -112,6 +112,12 @@ def is_addr_assigned(addr):
 
     return False
 
+def is_loopback_addr(addr):
+    """
+    Check if supplied IPv4/IPv6 address is a loopback address
+    """
+    return ipaddress.ip_address(addr).is_loopback
+
 def is_subnet_connected(subnet, primary=False):
     """
     Verify is the given IPv4/IPv6 subnet is connected to any interface on this