From bab8bd3f5a23d44faf0b67e50526ff3841ceff9b Mon Sep 17 00:00:00 2001
From: srividya0208 <a.srividya@vyos.io>
Date: Sun, 11 Apr 2021 13:47:02 -0400
Subject: T3458-e::tunnel interface:added GRETAP section for 1.3 ver

added the command configuration for gretap and corrected the syntax in
dhcp-relay example
---
 docs/configuration/interfaces/tunnel.rst | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'docs/configuration/interfaces/tunnel.rst')

diff --git a/docs/configuration/interfaces/tunnel.rst b/docs/configuration/interfaces/tunnel.rst
index d2d63ce2..22648095 100644
--- a/docs/configuration/interfaces/tunnel.rst
+++ b/docs/configuration/interfaces/tunnel.rst
@@ -201,6 +201,22 @@ An example:
    set interfaces tunnel tun0 address 172.16.17.18/24
    set interfaces tunnel tun0 parameters ip key 20
 
+GRETAP
+^^^^^^
+
+While normal GRE is for layer 3, GRETAP is for layer 2. GRETAP can encapsulate 
+Ethernet frames, thus it can be bridged with other interfaces to create 
+datalink layer segments that span multiple remote sites.
+
+Layer 2 GRE example:
+
+.. code-block:: none
+
+   set interfaces bridge br0 member interface eth0
+   set interfaces bridge br0 member interface tun0
+   set interfaces tunnel tun0 encapsulation gretap
+   set interfaces tunnel tun0 local-ip 198.51.100.2
+   set interfaces tunnel tun0 remote-ip 203.0.113.10
 
 Troubleshooting
 ^^^^^^^^^^^^^^^
-- 
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