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-rw-r--r--src/lib/connections/vlan3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/connections/vlan b/src/lib/connections/vlan
index b34a67e..037c971 100644
--- a/src/lib/connections/vlan
+++ b/src/lib/connections/vlan
@@ -10,6 +10,9 @@ vlan_up() {
if is_interface "$Interface"; then
report_error "Interface '$Interface' already exists"
return 1
+ elif [[ $VLANID != +([[:digit:]]) ]]; then
+ report_error "Invalid VLAN identifier: '$VLANID'"
+ return 1
else
bring_interface_up "$BindsToInterfaces"
interface_add vlan "$Interface" "$BindsToInterfaces" id "$VLANID"