bb_sharing_policy | no | string | Sharing policy for the backbone (if any). See <b>link</b> section for syntax/details.
availability_file | no | string | Allows you to use a file as input for availability. Similar to <b>hosts</b> attribute.
state_file | no | string | Allows you to use a file as input for states. Similar to <b>hosts</b> attribute.
-loopback_bw | no | int | Bandwidth for loopback (if any). See <b>link</b> section for syntax/details. If loopback_bw and loopback_lat (see below) attributes are omitted, no loopback link is created and all intra-node communication will use the main network link of the node. Loopback link is a <b>FATPIPE</b>.
+loopback_bw | no | int | Bandwidth for loopback (if any). See <b>link</b> section for syntax/details. If loopback_bw and loopback_lat (see below) attributes are omitted, no loopback link is created and all intra-node communication will use the main network link of the node. Loopback link is a \ref sharing_policy_fatpipe "\b FATPIPE".
loopback_lat | no | int | Latency for loopback (if any). See <b>link</b> section for syntax/details. See loopback_bw for more info.
topology | no | FLAT\|TORUS\|FAT_TREE (default: FLAT) | Network topology to use. SimGrid currently supports FLAT (with or without backbone, as described before), <a href="http://en.wikipedia.org/wiki/Torus_interconnect">TORUS </a> and FAT_TREE attributes for this tag.
topo_parameters | no | string | Specific parameters to pass for the topology defined in the topology tag. For torus networks, comma-separated list of the number of nodes in each dimension of the torus. For fat trees, refer to \ref AsClusterFatTree "AsClusterFatTree documentation".
id | yes | string | The identifier of the link to be used when referring to it.
bandwidth | yes | int | Maximum bandwidth for this link, given in bytes/s
latency | no | double (default: 0.0) | Latency for this link.
-sharing_policy | no | SHARED\|FATPIPE\|FULLDUPLEX (default: SHARED) | Sharing policy for the link.
+sharing_policy | no | \ref sharing_policy_shared "SHARED"\|\ref sharing_policy_fatpipe "FATPIPE"\|\ref sharing_policy_fullduplex "FULLDUPLEX" (default: SHARED) | Sharing policy for the link.
state | no | ON\|OFF (default: ON) | Allows you to to turn this link on or off (working / not working)
bandwidth_file | no | string | Allows you to use a file as input for bandwidth.
latency_file | no | string | Allows you to use a file as input for latency.
#### Sharing policy ####
-By default a network link is SHARED, i.e., if two or more data flows go
+\anchor sharing_policy_shared
+By default a network link is \b SHARED, i.e., if two or more data flows go
through a link, the bandwidth is shared fairly among all data flows. This
is similar to the sharing policy TCP uses.
-On the other hand, if a link is defined as a FATPIPE,
+\anchor sharing_policy_fatpipe
+On the other hand, if a link is defined as a \b FATPIPE,
each flow going through this link will be provided with the complete bandwidth,
i.e., no sharing occurs and the bandwidth is only limiting each flow individually.
+Please note that this is really on a per-flow basis, not only on a per-host basis!
The complete bandwidth provided by this link in this mode
is ``#flows*bandwidth``, with at most ``bandwidth`` being available per flow.
Using the FATPIPE mode allows to model backbones that won't affect performance
(except latency).
-The last mode available is FULLDUPLEX. This means that SimGrid will
+\anchor sharing_policy_fullduplex
+The last mode available is \b FULLDUPLEX. This means that SimGrid will
automatically generate two links (one carrying the suffix _UP and the other the
suffix _DOWN) for each ``<link>`` tag. This models situations when the direction
of traffic is important.
TODO
+\subsubsection pf_backbone <backbone/>
+
+\note
+ This tag is <b>only available</b> when the containing AS uses the "Cluster" mode!
+
+Using this tag, you can designate an already existing link to be a backbone.
+
+Attribute name | Mandatory | Values | Description
+--------------- | --------- | ------ | -----------
+id | yes | string | Name of the link that is supposed to act as a backbone.
+
\subsection pf_storage Storage
\note
