diff --git a/README.md b/README.md
index cdd3047..bd9384f 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ This supports the following RFC dictionaries at the moment:
 - [RFC2867](https://tools.ietf.org/html/rfc2867)
 - [RFC2868](https://tools.ietf.org/html/rfc2868)
 - [RFC3576](https://tools.ietf.org/html/rfc3576)
+- [RFC6677](https://tools.ietf.org/html/rfc6677)
 
 ## Usage
 
@@ -46,7 +47,6 @@ Simple example implementations are here:
   - rfc5904
   - rfc6519
   - rfc6572
-  - rfc6677
   - rfc6911
   - rfc6929
   - rfc6930
diff --git a/dicts/dictionary.rfc6677 b/dicts/dictionary.rfc6677
new file mode 100644
index 0000000..8f29bcc
--- /dev/null
+++ b/dicts/dictionary.rfc6677
@@ -0,0 +1,20 @@
+# -*- text -*-
+# Copyright (C) 2020 The FreeRADIUS Server project and contributors
+# This work is licensed under CC-BY version 4.0 https://creativecommons.org/licenses/by/4.0
+# Version $Id$
+#
+#	Attributes and values defined in RFC 6677
+#	http://www.ietf.org/rfc/rfc6677.txt
+#
+
+ATTRIBUTE	EAP-Lower-Layer				163	integer
+
+VALUE	EAP-Lower-Layer			Wired-IEEE-802.1X	1
+VALUE	EAP-Lower-Layer			IEEE-802.1X-No-Preauth	2
+VALUE	EAP-Lower-Layer			IEEE-802.1X-Preauth	3
+VALUE	EAP-Lower-Layer			IEEE-802.16e		4
+VALUE	EAP-Lower-Layer			IKEv2			5
+VALUE	EAP-Lower-Layer			PPP			6
+VALUE	EAP-Lower-Layer			PANA-No-Preauth		7
+VALUE	EAP-Lower-Layer			GSS-API			8
+VALUE	EAP-Lower-Layer			PANA-Preauth		9
diff --git a/radius/src/lib.rs b/radius/src/lib.rs
index cd8b92f..b40a5ed 100644
--- a/radius/src/lib.rs
+++ b/radius/src/lib.rs
@@ -8,4 +8,5 @@ pub mod rfc2866;
 pub mod rfc2867;
 pub mod rfc2868;
 pub mod rfc3576;
+pub mod rfc6677;
 pub mod tag;
diff --git a/radius/src/rfc6677.rs b/radius/src/rfc6677.rs
new file mode 100644
index 0000000..4f7ae4f
--- /dev/null
+++ b/radius/src/rfc6677.rs
@@ -0,0 +1,35 @@
+// Code generated by machine generator; DO NOT EDIT.
+
+use crate::avp::{AVPError, AVPType, AVP};
+use crate::packet::Packet;
+
+pub type EapLowerLayer = u32;
+pub const EAP_LOWER_LAYER_WIRED_IEEE_802_1X: EapLowerLayer = 1;
+pub const EAP_LOWER_LAYER_IEEE_802_1X_NO_PREAUTH: EapLowerLayer = 2;
+pub const EAP_LOWER_LAYER_IEEE_802_1X_PREAUTH: EapLowerLayer = 3;
+pub const EAP_LOWER_LAYER_IEEE_802_1_6E: EapLowerLayer = 4;
+pub const EAP_LOWER_LAYER_IK_EV_2: EapLowerLayer = 5;
+pub const EAP_LOWER_LAYER_PPP: EapLowerLayer = 6;
+pub const EAP_LOWER_LAYER_PANA_NO_PREAUTH: EapLowerLayer = 7;
+pub const EAP_LOWER_LAYER_GSS_API: EapLowerLayer = 8;
+pub const EAP_LOWER_LAYER_PANA_PREAUTH: EapLowerLayer = 9;
+
+pub const EAP_LOWER_LAYER_TYPE: AVPType = 163;
+pub fn delete_eap_lower_layer(packet: &mut Packet) {
+    packet.delete(EAP_LOWER_LAYER_TYPE);
+}
+pub fn add_eap_lower_layer(packet: &mut Packet, value: EapLowerLayer) {
+    packet.add(AVP::from_u32(EAP_LOWER_LAYER_TYPE, value as u32));
+}
+pub fn lookup_eap_lower_layer(packet: &Packet) -> Option<Result<EapLowerLayer, AVPError>> {
+    packet
+        .lookup(EAP_LOWER_LAYER_TYPE)
+        .map(|v| Ok(v.encode_u32()? as EapLowerLayer))
+}
+pub fn lookup_all_eap_lower_layer(packet: &Packet) -> Result<Vec<EapLowerLayer>, AVPError> {
+    let mut vec = Vec::new();
+    for avp in packet.lookup_all(EAP_LOWER_LAYER_TYPE) {
+        vec.push(avp.encode_u32()? as EapLowerLayer)
+    }
+    Ok(vec)
+}