View source for Grid5000:Network

{{Portal|Network}}
{{Portal|User}}
{{Maintainer|Lucas Nussbaum}}
{{Template:Site link|Network}}
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{{Note|text=
This page provides an overview of Grid'5000 network infrastructure. Other useful pages:
* [[Status#Network_Monitoring|'''Network monitoring section of the Status page''']]
* [[Virtualization on Grid'5000]] tutorial (provides introduction to [[Subnet reservation]])
* [[Network reconfiguration tutorial]] (provides introduction to [[KaVLAN]]; there's also another [[Advanced KaVLAN|more advanced tutorial]])
}}

=Grid'5000 Network Infrastructure=
==Backbone Network==

[[Image:Logo RENATER.png|150px|left]]
Grid'5000 backbone network infrastructure is provided by '''[http://www.renater.fr RENATER]'''. '''RENATER''' is the French National Telecommunication Network for Technology, Education and Research. More information can be found on [http://www.renater.fr renater.fr].

[[Image:renater5.jpg|251px|thumbnail|Renater's WDM infrastructure]]
[[Image:g5k-backbone.png|250px|thumbnail|10Gbps lambda activated for Grid'5000 in Renater's infrastructure]]


The actual phase of the network is '''RENATER-5''', the deployment has been completed by January 2009. Renater provides Grid'5000 a dedicated 10Gbit/s switching network  (using dedicated ''lambdas'' on Renater network infrastructure) and every Grid'5000 router devices is connected to the closest Renater's Point of Presence.

From Grid'5000 point of view, this '''backbone''' network interconnecting its sites is a single layer-2 Ethernet network. To forward communication between two sites, IP routing is performed through the backbone network.

The IP addresses of sites' router in the backbone network are:

 Network address:         <code class="host">192.168.4.0/24</code>
 Sophia:                  <code class="host">192.168.4.12</code>
 Lyon:                    <code class="host">192.168.4.13</code>
 Nancy:                   <code class="host">192.168.4.14</code>
 Grenoble:                <code class="host">192.168.4.15</code>
 Toulouse:                <code class="host">192.168.4.16</code>
 Lille:                   <code class="host">192.168.4.18</code>
 Rennes:                  <code class="host">192.168.4.19</code>
 Luxembourg:              <code class="host">192.168.4.21</code>
 Nantes:                  <code class="host">192.168.4.22</code>


==Grid'5000 sites networks==

Grid'5000 sites provide access to a variety of network technologies (both Ethernet and high-performance networks such as InfiniBand).
More information is available on the following pages:
* [[Grenoble:Network|Grenoble]]
* [[Lille:Network|Lille]]
* [[Luxembourg:Network|Luxembourg]]
* [[Lyon:Network|Lyon]]
* [[Nancy:Network|Nancy]]
* [[Nantes:Network|Nantes]]
* [[Rennes:Network|Rennes]]
* [[Sophia:Network|Sophia]]

The list of high performance networks is available on [[Hardware#Network_interconnects|this page]].

== Network parameters ==
* MTU (Maximum Transmission Unit): the default MTU configured on nodes is 1500, but all equipments are configured to allow MTU up to 9000
 ip link set INTERFACE mtu 9000

=Address space for virtual machines=
Grid'5000 has two different mechanisms to provide IP addresses to virtual machines: subnet reservation and KaVLAN.
* '''Subnet reservation''' provides a mean to allocate IP addresses in the production (= default) network. This provides a way to avoid conflicts between users, but does not provide isolation: all machines are still in the same L2 network. Subnet reservation is documented in the [[Virtualization_on_Grid'5000|Virtualization on the standard environment]] tutorial, and on the [[Subnet reservation]] page.
* '''KaVLAN''' provides network isolation through dynamic switches and routers reconfiguration, for the duration of an experiment. Inside a KaVLAN network, users are free to allocate IP addresses as needed. However, some IP ranges are routed to/from the KaVLAN network. KaVLAN is documented in the [[Network reconfiguration tutorial]] (which provides an introduction to KaVLAN), in the [[Network isolation on Grid%275000]] tutorial (which is a more advanced KaVLAN tutorial), and on the [[KaVLAN]] page.

=Tables of available IP networks=
== Production network and subnet reservation ==
<!-- https://www.grid5000.fr/mediawiki/index.php/Network_Golden_rules/Addressing_plan -->
{{:Network_Golden_rules/Addressing_plan}}

=== Virtual subnets configuration ===
<!-- https://www.grid5000.fr/mediawiki/index.php/Network_interlink/Virtual -->
{{:Network_interlink/Virtual}}

== KaVLAN ==
=== KaVLAN deployment status ===
<!-- https://www.grid5000.fr/mediawiki/index.php/KaVLAN/Version -->
{{:KaVLAN/Version}}

=== KaVLAN networks ===
<!-- https://www.grid5000.fr/mediawiki/index.php/Network_Golden_rules/KaVLAN -->
{{:Network_Golden_rules/KaVLAN}}

=== KaVLAN-NG networks ===
<!-- https://www.grid5000.fr/mediawiki/index.php/Network_Golden_rules/KaVLAN-NG -->
{{:Network_Golden_rules/KaVLAN-NG}}

= Access to the Internet =

See [[FAQ#Is_access_to_the_Internet_possible_from_nodes.3F]]