diff --git a/pfcwd/main.py b/pfcwd/main.py
index 880a5f33f8..c0e10c3402 100644
--- a/pfcwd/main.py
+++ b/pfcwd/main.py
@@ -3,6 +3,7 @@
 import click
 import swsssdk
 import os
+import sys
 from tabulate import tabulate
 from natsort import natsorted
 
@@ -194,9 +195,25 @@ def interval(poll_interval):
     configdb.connect()
     pfcwd_info = {}
     if poll_interval is not None:
+        pfcwd_table = configdb.get_table(CONFIG_DB_PFC_WD_TABLE_NAME)
+        entry_min = 3000
+        for entry in pfcwd_table:
+            if("Ethernet" not in entry):
+                continue
+            detection_time_entry_value = int(configdb.get_entry(CONFIG_DB_PFC_WD_TABLE_NAME, entry).get('detection_time'))
+            restoration_time_entry_value = int(configdb.get_entry(CONFIG_DB_PFC_WD_TABLE_NAME, entry).get('restoration_time'))
+            if ((detection_time_entry_value != None) and (detection_time_entry_value < entry_min)):
+                entry_min = detection_time_entry_value
+                entry_min_str = "detection time"
+            if ((restoration_time_entry_value != None) and (restoration_time_entry_value < entry_min)):
+                entry_min = restoration_time_entry_value
+                entry_min_str = "restoration time"
+        if entry_min < poll_interval:
+            print >> sys.stderr, "unable to use polling interval = {}ms, value is bigger than one of the configured {} values, please choose a smaller polling_interval".format(poll_interval,entry_min_str)
+            exit(1)
+        
         pfcwd_info['POLL_INTERVAL'] = poll_interval
-
-    configdb.mod_entry(CONFIG_DB_PFC_WD_TABLE_NAME, "GLOBAL", pfcwd_info)
+        configdb.mod_entry(CONFIG_DB_PFC_WD_TABLE_NAME, "GLOBAL", pfcwd_info)
 
 # Stop WD
 @cli.command()