diff --git a/README.md b/README.md
index 8790d26..c82a096 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,6 @@
 
  * Python 2.7
  * Scapy
- * pypcap (optional - VLAN tests will fail without this)
  * tcpdump (optional - Scapy will complain if it's missing)
  * Doxygen and doxypy (optional - for documentation generation)
  * PyLint (optional - for source checking)
diff --git a/src/python/oftest/dataplane.py b/src/python/oftest/dataplane.py
index 1cb04b8..81e5929 100644
--- a/src/python/oftest/dataplane.py
+++ b/src/python/oftest/dataplane.py
@@ -29,15 +29,8 @@
 
 if "linux" in sys.platform:
     import afpacket
-
-have_pypcap = False
-try:
+else:
     import pcap
-    if hasattr(pcap, "pcap"):
-        # the incompatible pylibpcap library masquerades as pcap
-        have_pypcap = True
-except:
-    pass
 
 def match_exp_pkt(exp_pkt, pkt):
     """
@@ -53,7 +46,7 @@
     return e == p
 
 
-class DataPlanePort:
+class DataPlanePortLinux:
     """
     Uses raw sockets to capture and send packets on a network interface.
     """
@@ -115,10 +108,8 @@
 
 class DataPlanePortPcap:
     """
-    Alternate port implementation using libpcap. This is required for recent
-    versions of Linux (such as Linux 3.2 included in Ubuntu 12.04) which
-    offload the VLAN tag, so it isn't in the data returned from a read on a raw
-    socket. libpcap understands how to read the VLAN tag from the kernel.
+    Alternate port implementation using libpcap. This is used by non-Linux
+    operating systems.
     """
 
     def __init__(self, interface_name, port_number):
@@ -192,10 +183,10 @@
         #
         if "dataplane" in self.config and "portclass" in self.config["dataplane"]:
             self.dppclass = self.config["dataplane"]["portclass"]
-        elif have_pypcap:
-            self.dppclass = DataPlanePortPcap
+        elif "linux" in sys.platform:
+            self.dppclass = DataPlanePortLinux
         else:
-            self.dppclass = DataPlanePort
+            self.dppclass = DataPlanePortPcap
 
         self.start()