policy: T4194: Add prefix-list duplication checks

Prefix-list should not be duplicatied as FRR doesn't accept it
One option when it can be duplicated when it uses "le" or "ge"

1 files changed, 6 insertions, 0 deletions

diff --git a/src/conf_mode/policy.py b/src/conf_mode/policy.py
index e251396c7..6b1d3bf1a 100755
--- a/src/conf_mode/policy.py
+++ b/src/conf_mode/policy.py
@@ -87,6 +87,7 @@ def verify(policy):
 
             # human readable instance name (hypen instead of underscore)
             policy_hr = policy_type.replace('_', '-')
+            entries = []
             for rule, rule_config in instance_config['rule'].items():
                 mandatory_error = f'must be specified for "{policy_hr} {instance} rule {rule}"!'
                 if 'action' not in rule_config:
@@ -113,6 +114,11 @@ def verify(policy):
                     if 'prefix' not in rule_config:
                         raise ConfigError(f'A prefix {mandatory_error}')
 
+                    # Check prefix duplicates
+                    if rule_config['prefix'] in entries and ('ge' not in rule_config and 'le' not in rule_config):
+                        raise ConfigError(f'Prefix {rule_config["prefix"]} is duplicated!')
+                    entries.append(rule_config['prefix'])
+
 
     # route-maps tend to be a bit more complex so they get their own verify() section
     if 'route_map' in policy: