diff --git a/README.md b/README.md
index 8fe633c..acc202d 100644
--- a/README.md
+++ b/README.md
@@ -85,11 +85,13 @@ from ciscoconfparse import CiscoConfParse
 #  ipv6 address fe80::1 link-local
 #  ipv6 enable
 #  ipv6 ospf 11 area 0
-#  standby 11 ip 172.16.2.254
-#  standby 11 ipv6 autoconfig
-#  standby 11 priority 150
-#  standby 11 preempt delay minimum 15
-#  standby 11 track Dialer1 75
+#  standby 110 ip 172.16.2.254
+#  standby 110 ipv6 autoconfig
+#  standby 110 priority 150
+#  standby 110 preempt delay minimum 15
+#  standby 110 track Dialer1 75
+#  standby 110 track FastEthernet0/1 20
+#  standby 110 track FastEthernet1/0 30
 #  standby 111 ip 172.16.2.253
 #  standby 111 priority 150
 #  standby 111 preempt delay minimum 15
@@ -207,9 +209,9 @@ Interface FastEthernet0/0: 172.16.2.1/24
     Tracking interface: Dialer1
     Tracking decrement: 75
     Tracking weighting: None
-    --- Tracking FastEthernet0/1 ---
-    Tracking interface: FastEthernet0/1
-    Tracking decrement: 20
+    --- Tracking FastEthernet 0/1 ---
+    Tracking interface: FastEthernet 0/1
+    Tracking decrement: 10
     Tracking weighting: None
     --- Tracking FastEthernet1/0 ---
     Tracking interface: FastEthernet1/0
@@ -220,6 +222,8 @@ Interface FastEthernet0/0: 172.16.2.1/24
     Tracking interface: Dialer1
     Tracking decrement: 50
     Tracking weighting: None
+GRP {'addr': <IPv6Obj fd01:ab00::/64>}
+RESULT <IOSIntfLine # 231 'FastEthernet0/0' primary_ipv4: '172.16.2.1/24'> <IPv6Obj fd01:ab00::/64>
 ```
 
 
diff --git a/ciscoconfparse/models_cisco.py b/ciscoconfparse/models_cisco.py
index 720d5d8..2b9124d 100644
--- a/ciscoconfparse/models_cisco.py
+++ b/ciscoconfparse/models_cisco.py
@@ -149,7 +149,7 @@ def group(self):
     @property
     @logger.catch(reraise=True)
     def decrement(self):
-        if isinstance(self._decrement, (str, int)):
+        if isinstance(self._decrement, (str, int)) and str(self._decrement) != "":
             return int(self._decrement)
         else:
             return None
@@ -304,12 +304,15 @@ def get_hsrp_tracked_interfaces(self):
         for obj in self._parent.children:
             obj_parts = obj.text.strip().split()
             if obj_parts[0:3] == ["standby", str(self._group), "track"]:
-                _groupdict = obj.re_match_iter_typed(
-                    r"standby\s(\d+)\s+track\s+(?P<intf>\S.+?)\s+(?P<decr>\d+)$",
-                    groupdict={"intf": str, "decr": int},
+                interface = None
+                decrement = 10
+                _gg = obj.re_match_iter_typed(
+                    r"standby\s(\d+)\s+track\s+(?P<intf>\S.+?)(?P<decr>\s+\d+)*$",
+                    groupdict={"intf": str, "decr": str},
                 )
-                interface = _groupdict["intf"]
-                decrement = _groupdict["decr"]
+                interface = _gg["intf"]
+                if isinstance(_gg["decr"], str) and _gg["decr"] != "None":
+                    decrement = int(_gg["decr"].strip())
                 retval.append(
                     TrackingInterface(
                         group=int(self._group),