diff --git a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
index 6eca1e8..30c9c16 100644
--- a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
+++ b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
@@ -669,6 +669,11 @@
 
         private void deviceAdd(DeviceId deviceId) {
             IgnoreDhcpConfig config = cfgService.getConfig(appId, IgnoreDhcpConfig.class);
+            if (config == null) {
+                log.debug("No ignoreVlan config found for {}. Do nothing.", deviceId);
+                return;
+            }
+
             Collection<VlanId> vlanIds = config.ignoredVlans().get(deviceId);
             vlanIds.forEach(vlanId -> {
                 processIgnoreVlanRule(deviceId, vlanId, ADD);