openstack/openstack-manuals
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Merge "Adds intro_tunnel_technologies initial version"

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Jenkins 2015-03-16 19:37:04 +00:00 committed by Gerrit Code Review
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doc/networking-guide/source/intro_tunnel_technologies.rst
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===================
Tunnel Technologies
Tunnel technologies
===================
Layer 2
~~~~~~~
Tunneling allows one network protocol to encapsulate another payload
protocol such that packets from the payload protocol are passed as
data on the delivery protocol. For example, this can be used to pass
data securely over an untrusted network.
VLAN
----
Generic routing encapsulation (GRE)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Layer 3
~~~~~~~
GRE carries IP packets with private IP addresses over the Internet
using delivery packets with public IP addresses.
GRE
---
Virtual extensible local area network (VXLAN)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
VXLAN
-----
VXLAN encapsulates layer-2 Ethernet frames over layer-4 UDP packets.