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-rw-r--r--python/vyos/configverify.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/python/vyos/configverify.py b/python/vyos/configverify.py
index 99c472582..41d80d6e7 100644
--- a/python/vyos/configverify.py
+++ b/python/vyos/configverify.py
@@ -45,6 +45,16 @@ def verify_mtu(config):
raise ConfigError(f'Interface MTU too high, ' \
f'maximum supported MTU is {max_mtu}!')
+def verify_mtu_parent(config, parent):
+ if 'mtu' not in config or 'mtu' not in parent:
+ return
+
+ mtu = int(config['mtu'])
+ parent_mtu = int(parent['mtu'])
+ if mtu > parent_mtu:
+ raise ConfigError(f'Interface MTU ({mtu}) too high, ' \
+ f'parent interface MTU is {parent_mtu}!')
+
def verify_mtu_ipv6(config):
"""
Common helper function used by interface implementations to perform
@@ -266,6 +276,7 @@ def verify_vlan_config(config):
verify_dhcpv6(vlan)
verify_address(vlan)
verify_vrf(vlan)
+ verify_mtu_parent(vlan, config)
# 802.1ad (Q-in-Q) VLANs
for s_vlan in config.get('vif_s', {}):
@@ -273,12 +284,15 @@ def verify_vlan_config(config):
verify_dhcpv6(s_vlan)
verify_address(s_vlan)
verify_vrf(s_vlan)
+ verify_mtu_parent(s_vlan, config)
for c_vlan in s_vlan.get('vif_c', {}):
c_vlan = s_vlan['vif_c'][c_vlan]
verify_dhcpv6(c_vlan)
verify_address(c_vlan)
verify_vrf(c_vlan)
+ verify_mtu_parent(c_vlan, config)
+ verify_mtu_parent(c_vlan, s_vlan)
def verify_accel_ppp_base_service(config):
"""