Version 8 (modified by, 7 years ago) (diff)


Internet2 GENI Stitching Computation Service

The Internet2 (I2) GENI Stitching Computation Service (SCS) was developed by the Mid-Atlantic Crossroads (MAX) and is currently being run as a GENI service and supported by Internet2 the GENI Meta Operations Center (GMOC). The 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:


Submit issues or questions about the GENI SCS send email to Problem reports can also be directly submitted via the problem report page.

Stitching Service Details

The GENI SCS was developed by 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 Delegated GENI Stitching VLANs page. Also any GENI aggregate that supports stitching provides information details in its GENI aggregate page details.

Stitching Connections to GENI End-points

Using GENI credentials, or credentials from an InCommon identity provider, users can request GENI resources using any tools that supports stitching, such as (GCF stitcher, GENI Portal jFed or Jacks tools, and via jFed at iMinds. Production GENI sites that support stitching and are known to the I2 SCS are documented in the GENI Network Stitching Sites page.

Stitching Path details

The I2 SCS supplies paths and VLAN information for all sites listed at GENI Network Stitching Sites. Path chosen may include one or more of the following network aggregates: 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 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 GENI Network Stitching Sites page or simply use the omni tool to get a list of known aggregates.

VLAN Translation

The I2 SCS supports interactions with the 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:

Email us with questions and feedback on this page!