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-rw-r--r--docs/configuration/interfaces/tunnel.rst15
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/configuration/interfaces/tunnel.rst b/docs/configuration/interfaces/tunnel.rst
index 36b1d70b..7f7cd709 100644
--- a/docs/configuration/interfaces/tunnel.rst
+++ b/docs/configuration/interfaces/tunnel.rst
@@ -201,6 +201,21 @@ 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.
+
+.. 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 source-address 198.51.100.2
+ set interfaces tunnel tun0 remote 203.0.113.10
+
Troubleshooting
^^^^^^^^^^^^^^^