diff --git a/xos/cord/admin.py b/xos/cord/admin.py
index dbe0b35..981f275 100644
--- a/xos/cord/admin.py
+++ b/xos/cord/admin.py
@@ -51,7 +51,8 @@
         return VOLTService.get_service_objects_by_user(request.user)
 
 class VOLTTenantForm(forms.ModelForm):
-    vlan_id = forms.CharField()
+    s_tag = forms.CharField()
+    c_tag = forms.CharField()
     creator = forms.ModelChoiceField(queryset=User.objects.all())
 
     def __init__(self,*args,**kwargs):
@@ -60,7 +61,8 @@
         self.fields['provider_service'].queryset = VOLTService.get_service_objects().all()
         if self.instance:
             # fields for the attributes
-            self.fields['vlan_id'].initial = self.instance.vlan_id
+            self.fields['c_tag'].initial = self.instance.c_tag
+            self.fields['s_tag'].initial = self.instance.s_tag
             self.fields['creator'].initial = self.instance.creator
         if (not self.instance) or (not self.instance.pk):
             # default fields for an 'add' form
@@ -70,7 +72,8 @@
                self.fields["provider_service"].initial = VOLTService.get_service_objects().all()[0]
 
     def save(self, commit=True):
-        self.instance.vlan_id = self.cleaned_data.get("vlan_id")
+        self.instance.s_tag = self.cleaned_data.get("s_tag")
+        self.instance.c_tag = self.cleaned_data.get("c_tag")
         self.instance.creator = self.cleaned_data.get("creator")
         return super(VOLTTenantForm, self).save(commit=commit)
 
@@ -78,10 +81,10 @@
         model = VOLTTenant
 
 class VOLTTenantAdmin(ReadOnlyAwareAdmin):
-    list_display = ('backend_status_icon', 'id', 'service_specific_id', 'vlan_id', 'subscriber_root' )
+    list_display = ('backend_status_icon', 'id', 'service_specific_id', 's_tag', 'c_tag', 'subscriber_root' )
     list_display_links = ('backend_status_icon', 'id')
     fieldsets = [ (None, {'fields': ['backend_status_text', 'kind', 'provider_service', 'subscriber_root', 'service_specific_id', # 'service_specific_attribute',
-                                     'vlan_id', 'creator'],
+                                     's_tag', 'c_tag', 'creator'],
                           'classes':['suit-tab suit-tab-general']})]
     readonly_fields = ('backend_status_text', 'service_specific_attribute')
     form = VOLTTenantForm
diff --git a/xos/cord/models.py b/xos/cord/models.py
index 4227f52..afbe3ef 100644
--- a/xos/cord/models.py
+++ b/xos/cord/models.py
@@ -254,7 +254,7 @@
 
     KIND = VOLT_KIND
 
-    default_attributes = {"vlan_id": None, }
+    default_attributes = {"vlan_id": None, "s_tag": None, "c_tag": None}
     def __init__(self, *args, **kwargs):
         volt_services = VOLTService.get_service_objects().all()
         if volt_services:
@@ -263,12 +263,30 @@
         self.cached_vcpe = None
 
     @property
+    def s_tag(self):
+        return self.get_attribute("s_tag", self.default_attributes["s_tag"])
+
+    @s_tag.setter
+    def s_tag(self, value):
+        self.set_attribute("s_tag", value)
+
+    @property
+    def c_tag(self):
+        return self.get_attribute("c_tag", self.default_attributes["c_tag"])
+
+    @c_tag.setter
+    def c_tag(self, value):
+        self.set_attribute("c_tag", value)
+
+    # for now, vlan_id is a synonym for c_tag
+
+    @property
     def vlan_id(self):
-        return self.get_attribute("vlan_id", self.default_attributes["vlan_id"])
+        return self.c_tag
 
     @vlan_id.setter
     def vlan_id(self, value):
-        self.set_attribute("vlan_id", value)
+        self.c_tag = value
 
     @property
     def vcpe(self):
diff --git a/xos/cord/rest_examples/add_volt_tenant.sh b/xos/cord/rest_examples/add_volt_tenant.sh
index 5dd3dd4..4bbe2bb 100755
--- a/xos/cord/rest_examples/add_volt_tenant.sh
+++ b/xos/cord/rest_examples/add_volt_tenant.sh
@@ -3,8 +3,9 @@
 source ./config.sh
 
 SERVICE_SPECIFIC_ID=1238
-VLAN_ID=1238
+C_TAG=1238
+S_TAG=3333
 
-echo curl "-H \"Accept: application/json; indent=4\" -H \"Content-Type: application/json\" -u $AUTH -X POST -d \"{\\\"service_specific_id\\\": \\\"$SERVICE_SPECIFIC_ID\\\", \\\"vlan_id\\\": \\\"$VLAN_ID\\\"}\" $HOST/xoslib/volttenant/"
+echo curl "-H \"Accept: application/json; indent=4\" -H \"Content-Type: application/json\" -u $AUTH -X POST -d \"{\\\"service_specific_id\\\": \\\"$SERVICE_SPECIFIC_ID\\\", \\\"c_tag\\\": \\\"$C_TAG\\\", \\\"s_tag\\\": \\\"$S_TAG\\\"}\" $HOST/xoslib/volttenant/"
 
-curl -H "Accept: application/json; indent=4" -H "Content-Type: application/json" -u $AUTH -X POST -d "{\"service_specific_id\": \"$SERVICE_SPECIFIC_ID\", \"vlan_id\": \"$VLAN_ID\"}" $HOST/xoslib/volttenant/  
+curl -H "Accept: application/json; indent=4" -H "Content-Type: application/json" -u $AUTH -X POST -d "{\"service_specific_id\": \"$SERVICE_SPECIFIC_ID\", \"c_tag\": \"$C_TAG\", \"s_tag\": \"$S_TAG\"}" $HOST/xoslib/volttenant/  
diff --git a/xos/cord/rest_examples/config.sh b/xos/cord/rest_examples/config.sh
index 7b8c8e1..06162ee 100644
--- a/xos/cord/rest_examples/config.sh
+++ b/xos/cord/rest_examples/config.sh
@@ -1,5 +1,6 @@
 #HOST=198.0.0.44:8000
-HOST=10.254.1.22:8000
+#HOST=10.254.1.22:8000
+HOST=clnode050.clemson.cloudlab.us:9999
 
 #AUTH=scott@onlab.us:letmein
 AUTH=padmin@vicci.org:letmein
diff --git a/xos/core/xoslib/methods/cordsubscriber.py b/xos/core/xoslib/methods/cordsubscriber.py
index c26ac54..297ac4a 100644
--- a/xos/core/xoslib/methods/cordsubscriber.py
+++ b/xos/core/xoslib/methods/cordsubscriber.py
@@ -28,7 +28,9 @@
 class CordSubscriberIdSerializer(serializers.ModelSerializer, PlusSerializerMixin):
         id = ReadOnlyField()
         service_specific_id = ReadOnlyField()
-        vlan_id = ReadOnlyField()
+        vlan_id = ReadOnlyField()      # XXX remove this
+        c_tag = ReadOnlyField()
+        s_tag = ReadOnlyField()
         vcpe_id = ReadOnlyField()
         instance = ReadOnlyField()
         image = ReadOnlyField()
@@ -59,7 +61,7 @@
         class Meta:
             model = CordSubscriber
             fields = ('humanReadableName', 'id',
-                      'service_specific_id', 'vlan_id',
+                      'service_specific_id', 'vlan_id', 's_tag', 'c_tag',
                       'vcpe_id', 'instance', 'instance_name', 'image', 'image_name',
                       'firewall_enable', 'firewall_rules',
                       'url_filter_enable', 'url_filter_rules', 'url_filter_level',
diff --git a/xos/core/xoslib/methods/volttenant.py b/xos/core/xoslib/methods/volttenant.py
index e5998da..bf48290 100644
--- a/xos/core/xoslib/methods/volttenant.py
+++ b/xos/core/xoslib/methods/volttenant.py
@@ -26,7 +26,9 @@
 class VOLTTenantIdSerializer(serializers.ModelSerializer, PlusSerializerMixin):
         id = ReadOnlyField()
         service_specific_id = serializers.CharField()
-        vlan_id = serializers.CharField()
+        #vlan_id = serializers.CharField()
+        s_tag = serializers.CharField()
+        c_tag = serializers.CharField()
         provider_service = serializers.PrimaryKeyRelatedField(queryset=VOLTService.get_service_objects().all(), default=get_default_volt_service)
 
         humanReadableName = serializers.SerializerMethodField("getHumanReadableName")
@@ -35,7 +37,7 @@
 
         class Meta:
             model = VOLTTenant
-            fields = ('humanReadableName', 'id', 'provider_service', 'service_specific_id', 'vlan_id', 'computeNodeName' )
+            fields = ('humanReadableName', 'id', 'provider_service', 'service_specific_id', 's_tag', 'c_tag', 'computeNodeName' )
 
         def getHumanReadableName(self, obj):
             return obj.__unicode__()
@@ -62,9 +64,19 @@
         if service_specific_id is not None:
             queryset = queryset.filter(service_specific_id=service_specific_id)
 
-        vlan_id = self.request.QUERY_PARAMS.get('vlan_id', None)
-        if vlan_id is not None:
-            ids = [x.id for x in queryset if x.get_attribute("vlan_id", None)==vlan_id]
+#        vlan_id = self.request.QUERY_PARAMS.get('vlan_id', None)
+#        if vlan_id is not None:
+#            ids = [x.id for x in queryset if x.get_attribute("vlan_id", None)==vlan_id]
+#            queryset = queryset.filter(id__in=ids)
+
+        c_tag = self.request.QUERY_PARAMS.get('c_tag', None)
+        if c_tag is not None:
+            ids = [x.id for x in queryset if x.get_attribute("c_tag", None)==c_tag]
+            queryset = queryset.filter(id__in=ids)
+
+        s_tag = self.request.QUERY_PARAMS.get('s_tag', None)
+        if s_tag is not None:
+            ids = [x.id for x in queryset if x.get_attribute("s_tag", None)==s_tag]
             queryset = queryset.filter(id__in=ids)
 
         return queryset
@@ -74,7 +86,7 @@
 
         existing_obj = None
         for obj in VOLTTenant.get_tenant_objects().all():
-            if (obj.vlan_id == data.get("vlan_id", None)) and (obj.service_specific_id == data.get("service_specific_id",None)):
+            if (obj.c_tag == data.get("c_tag", None)) and (obj.s_tag == data.get("s_tag", None)) and  (obj.service_specific_id == data.get("service_specific_id",None)):
                existing_obj = obj
 
         if existing_obj:
diff --git a/xos/core/xoslib/objects/cordsubscriber.py b/xos/core/xoslib/objects/cordsubscriber.py
index 318d54c..089c91b 100644
--- a/xos/core/xoslib/objects/cordsubscriber.py
+++ b/xos/core/xoslib/objects/cordsubscriber.py
@@ -113,7 +113,9 @@
                      # ("services", "vcpe.services"),
                      # ("cdn_enable", "vcpe.cdn_enable"),
 
-                     ("vlan_id", "volt.vlan_id"),
+                     ("vlan_id", "volt.vlan_id"),      # XXX remove this
+                     ("c_tag", "volt.c_tag"),
+                     ("s_tag", "volt.s_tag"),
 
                      ("bbs_account", "volt.vcpe.bbs_account"),
                      ("ssh_command", "volt.vcpe.ssh_command"),
diff --git a/xos/core/xoslib/templates/xosCordSubscriber.html b/xos/core/xoslib/templates/xosCordSubscriber.html
index b7e2163..db42fb8 100644
--- a/xos/core/xoslib/templates/xosCordSubscriber.html
+++ b/xos/core/xoslib/templates/xosCordSubscriber.html
@@ -7,7 +7,8 @@
   <table class="xos-detail-table cord-subscriber-table">
   <tr><td class="xos-label-cell">Id:</td><td><%= model.attributes.id %></td></tr>
   <tr><td class="xos-label-cell">Service Specific Id:</td><td><%= model.attributes.service_specific_id %></td></tr>
-  <tr><td class="xos-label-cell">VLAN Id:</td><td><%= model.attributes.vlan_id %></td></tr>
+  <tr><td class="xos-label-cell">S-Tag:</td><td><%= model.attributes.s_tag %></td></tr>
+  <tr><td class="xos-label-cell">C-Tag:</td><td><%= model.attributes.c_tag %></td></tr>
   </table>
   </div>
 
diff --git a/xos/observers/vcpe/steps/sync_vcpetenant.py b/xos/observers/vcpe/steps/sync_vcpetenant.py
index 1a45b54..120954b 100644
--- a/xos/observers/vcpe/steps/sync_vcpetenant.py
+++ b/xos/observers/vcpe/steps/sync_vcpetenant.py
@@ -113,15 +113,21 @@
             logger.info("neither bbs_slice nor bbs_server is configured in the vCPE")
 
         vlan_ids = []
+        s_tags = []
+        c_tags = []
         if o.volt:
-            vlan_ids.append(o.volt.vlan_id)
+            vlan_ids.append(o.volt.vlan_id)  # XXX remove this
+            s_tags.append(o.volt.s_tag)
+            c_tags.append(o.volt.c_tag)
 
         try:
             full_setup = Config().observer_full_setup
         except:
             full_setup = True
 
-        fields = {"vlan_ids": vlan_ids,
+        fields = {"vlan_ids": vlan_ids,   # XXX remove this
+                "s_tags": s_tags,
+                "c_tags": c_tags,
                 "dnsdemux_ip": dnsdemux_ip,
                 "cdn_prefixes": cdn_prefixes,
                 "bbs_addrs": bbs_addrs,
diff --git a/xos/observers/vcpe/steps/sync_vcpetenant.yaml b/xos/observers/vcpe/steps/sync_vcpetenant.yaml
index b5a112a..e4d3167 100644
--- a/xos/observers/vcpe/steps/sync_vcpetenant.yaml
+++ b/xos/observers/vcpe/steps/sync_vcpetenant.yaml
@@ -13,6 +13,14 @@
         {% for vlan_id in vlan_ids %}
         - {{ vlan_id }}
         {% endfor %}
+      c_tags:
+        {% for c_tag in c_tags %}
+        - {{ c_tag }}
+        {% endfor %}
+      s_tags:
+        {% for s_tag in s_tags %}
+        - {{ s_tag }}
+        {% endfor %}
       firewall_rules:
         {% for firewall_rule in firewall_rules.split("\n") %}
         - {{ firewall_rule }}