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-rwxr-xr-xsrc/conf_mode/interfaces-vxlan.py24
1 files changed, 22 insertions, 2 deletions
diff --git a/src/conf_mode/interfaces-vxlan.py b/src/conf_mode/interfaces-vxlan.py
index 804f2d14f..b197d08a6 100755
--- a/src/conf_mode/interfaces-vxlan.py
+++ b/src/conf_mode/interfaces-vxlan.py
@@ -44,6 +44,20 @@ def get_config(config=None):
base = ['interfaces', 'vxlan']
vxlan = get_interface_dict(conf, base)
+ # We need to verify that no other VXLAN tunnel is configured when external
+ # mode is in use - Linux Kernel limitation
+ conf.set_level(base)
+ vxlan['other_tunnels'] = conf.get_config_dict([], key_mangling=('-', '_'),
+ get_first_key=True,
+ no_tag_node_value_mangle=True)
+
+ # This if-clause is just to be sure - it will always evaluate to true
+ ifname = vxlan['ifname']
+ if ifname in vxlan['other_tunnels']:
+ del vxlan['other_tunnels'][ifname]
+ if len(vxlan['other_tunnels']) == 0:
+ del vxlan['other_tunnels']
+
return vxlan
def verify(vxlan):
@@ -63,8 +77,14 @@ def verify(vxlan):
if not any(tmp in ['group', 'remote', 'source_address'] for tmp in vxlan):
raise ConfigError('Group, remote or source-address must be configured')
- if 'vni' not in vxlan:
- raise ConfigError('Must configure VNI for VXLAN')
+ if 'vni' not in vxlan and 'external' not in vxlan:
+ raise ConfigError(
+ 'Must either configure VXLAN "vni" or use "external" CLI option!')
+
+ if {'external', 'other_tunnels'} <= set(vxlan):
+ other_tunnels = ', '.join(vxlan['other_tunnels'])
+ raise ConfigError(f'Only one VXLAN tunnel is supported when "external" '\
+ f'CLI option is used. Additional tunnels: {other_tunnels}')
if 'source_interface' in vxlan:
# VXLAN adds at least an overhead of 50 byte - we need to check the