dhcp: T3626: Prevent to disable only one configured network

1 files changed, 9 insertions, 0 deletions

diff --git a/src/conf_mode/dhcp_server.py b/src/conf_mode/dhcp_server.py
index 485b25e4c..fc8855f9f 100755
--- a/src/conf_mode/dhcp_server.py
+++ b/src/conf_mode/dhcp_server.py
@@ -664,9 +664,14 @@ def verify(dhcp):
     failover_names = []
     listen_ok = False
     subnets = []
+    shared_networks =  len(dhcp['shared_network'])
+    disabled_shared_networks = 0
 
     # A shared-network requires a subnet definition
     for network in dhcp['shared_network']:
+        if network['disabled']:
+            disabled_shared_networks += 1
+
         if len(network['subnet']) == 0:
             raise ConfigError('No DHCP lease subnets configured for {0}. At least one\n' \
                               'lease subnet must be configured for each shared network.'.format(network['name']))
@@ -793,6 +798,10 @@ def verify(dhcp):
                     if net.overlaps(net2):
                         raise ConfigError('DHCP conflicting subnet ranges: {0} overlaps {1}'.format(net, net2))
 
+    # Prevent 'disable' for shared-network if only one network is configured
+    if (shared_networks - disabled_shared_networks) < 1:
+        raise ConfigError('At least one shared network must be active!')
+
     if not listen_ok:
         raise ConfigError('DHCP server configuration error!\n' \
                           'None of configured DHCP subnets does not have appropriate\n' \