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= Internet2 GENI Stitching Computation Service =

The Internet2 (I2) GENI Stitching Computation Service (SCS) was developed by the [http://www.maxgigapop.net/ Mid-Atlantic Crossroads] (MAX) and is currently being run as a GENI service and supported by Internet2 the GENI Meta Operations Center (GMOC).  The [https://wiki.maxgigapop.net/twiki/bin/view/GENI/NetworkStitchingSoftware SCS] software provides GENI Network Stitching path information between GENI sites.  GENI Network stitching primarily refers to the interconnect of VLAN-based Ethernets via the GENI Aggregate Manager API. The SCS is used by the GENI Portal and Omni tools to determine available paths between experimenters specified GENI sites. The production SCS for GENI run at:

   - http://geni-scs.net.internet2.edu:8081/geni/xmlrpc  - Pre-GCF 2.8, non authenticated
   - https://geni-scs.net.internet2.edu:8443/geni/xmlrpc - Secure and authenticate supported by GCF 2.8 or higher.

=== Contact ===

Submit issues or questions about the GENI SCS send email to [mailto:noc@net.internet2.edu]. Problem reports can also be directly submitted via the [http://globalnoc.iu.edu/i2network/support/report-a-problem.html problem report] page.

= Stitching Service Details = 

The GENI SCS was developed by [http://www.maxgigapop.net/ MAX] and provides path information to applications that create slivers between GENI sites. The service also track VLAN delegation for all GENI sites that support stitching. For a list of VLANs delegated by all aggregates supporting stitching see the [https://wiki.maxgigapop.net/twiki/bin/view/GENI/StaticNetworksView Delegated GENI Stitching VLANs] page. Also any [wiki:GeniAggregate GENI aggregate] that supports stitching provides information details in its [wiki:GeniAggregate GENI aggregate] page details.

== Stitching Connections to GENI End-points  ==

Using GENI credentials, or credentials from an [http://incommon.org InCommon] identity provider, users can request GENI resources using any tools that supports stitching, such as ([http://trac.gpolab.bbn.com/gcf/wiki/Stitcher GCF stitcher], [https://portal.geni.net/ GENI Portal jFed or Jacks tools], and via [http://jfed.iminds.be/ jFed at iMinds]. Production GENI sites that support stitching and are known to the [wiki:GeniSite/I2SCS I2 SCS] are documented in the [wiki:GeniNetworkStitchingSites GENI Network Stitching Sites] page.

== Stitching Path details ==

The I2 SCS supplies paths and VLAN information for all sites listed at [wiki:GeniNetworkStitchingSites GENI Network Stitching Sites]. Path chosen may include one or more of the following network aggregates: ION, AL2S, MAX, and PG Utah (University of Utah sites only). For a list of VLANs that have been delegate for GENI stitching use see the [https://wiki.maxgigapop.net/twiki/bin/view/GENI/StaticNetworksView Delegated GENI Stitching VLANs] page.

Path details are not captured here as they are continuously expanding. GENI site aggregates and GENI network aggregates can be queried for their resource Advertisements, which can be used to determine switch connection details and available VLANs.

== Topology Information ==

For a list of known stitching aggregate refer to the the [wiki:GeniNetworkStitchingSites GENI Network Stitching Sites] page or simply use the omni tool scs.py to get a list of known aggregates.  
 
== VLAN Translation == 

The I2 SCS supports interactions with the ION, AL2S and MAX network aggregates, and all these network aggregates support VLAN translation.

= Connection Inventory =

For a list of AL2S sites connections that are used for GENI stitching see the Network Stitching sections for:
  - [wiki:GeniAggregate/I2AL2S#GENINetworkStitching AL2S aggregate] 
  - [wiki:GeniAggregate/I2ION#GENINetworkStitching ION aggregate] 


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