diff --git a/protocols/osi3/ipv4.yml b/protocols/osi3/ipv4.yml
index 40734c8..2ecd550 100644
--- a/protocols/osi3/ipv4.yml
+++ b/protocols/osi3/ipv4.yml
@@ -32,7 +32,6 @@ protocol:
       length: 3
       subfields:
         - field: reserved
-          desc: reserved
           bitfield: yes
           length: 1
         - field: df
diff --git a/protocols/osi3/ipv6.yml b/protocols/osi3/ipv6.yml
new file mode 100644
index 0000000..6729f65
--- /dev/null
+++ b/protocols/osi3/ipv6.yml
@@ -0,0 +1,31 @@
+---
+protocol:
+  name: ipv6
+  osilayer: 3
+  fields:
+    - field: version
+      bitfield: yes
+      length: 4
+    - field: trafficclass
+      desc: traffic class
+      bitfield: yes
+      length: 8
+    - field: flowlabel
+      desc: flow label
+      bitfield: yes
+      length: 20
+    - field: length
+      desc: payload length
+      length: 2
+    - field: nextheader
+      desc: next header identifier (see ipv4 protocol id)
+      length: 1
+    - field: hoplimit
+      desc: hop limit
+      length: 1
+    - field: srcaddress
+      desc: source address
+      length: 16
+    - field: dstaddress
+      desc: destination address
+      length: 16
\ No newline at end of file
diff --git a/protocols/osi4/udp.yml b/protocols/osi4/udp.yml
new file mode 100644
index 0000000..dffcdeb
--- /dev/null
+++ b/protocols/osi4/udp.yml
@@ -0,0 +1,17 @@
+---
+protocol:
+  name: udp
+  shortname: udp
+  osilayer: 4
+  fields:
+    - field: srcport
+      desc: source port
+      length: 2
+    - field: dstport
+      desc: destination port
+      length: 2
+    - field: length
+      desc: length of header and data
+      length: 2
+    - field: checksum
+      length: 2
\ No newline at end of file