GENI Network Stitching Sites

Last update: 2017-06-19

The following 34 sites have been tested and are available for GENI Network Stitching experiments via the listed networks:

Site Name Nickname AL2S VLANs
Case Western Reserve University InstaGENI crwu-ig 21
CENIC InstaGENI cenic-ig 20
Clemson University clemson-ig 15
Georgia Institute of Technology gatech-ig 15
GPO ExoGENI gpo-eg 30
GPO InstaGENI gpo-ig 30
Mid-Atlantic Crossroads (MAX) InstaGENI max-ig 60
Naval Postgraduate School InstaGENI nps-ig 15
Northwestern University InstaGENI northwestern-ig 15
NYSERNet InstaGENI nysernet-ig 20
Rutgers University InstaGENI rutgers-ig 21
Southern Crossroads InstaGENI sox-ig 15
Stanford InstaGENI stanford-ig 15
University of California Los Angeles InstaGENI ucla-ig 20
University of Chicago InstaGENI chicago-ig 20
University of Hawaii InstaGENI hawaii-ig 20
University of Illinois InstaGENI illinois-ig 20
University of Kansas InstaGENI kansas-ig 20
University of Kentucky InstaGENI uky-ig 20
University of Kentucky ProtoGENI uky-pg 10
University of Kentucky MCV InstaGENI ukymcv-ig 20
University of Kentucky PKS2 InstaGENI ukypks2-ig 20
University of Louisiana InstaGENI ullafayette-ig 20
University of Michigan InstaGENI umich-ig 15
University of Missouri InstaGENI missouri-ig 15
University of Missouri Kansas City InstaGENIumkc-ig 15
University of Tennessee Chattanooga utc-ig 15
University of Texas at Dallas (US Ignite) utdallas-ig 20
University of Utah Downtown Data Center InstaGENI utahddc-ig 1400
University of Utah InstaGENI utah-ig 1400
University of Utah ProtoGENI utah-pg 1400
University of Vermont uvm-ig 50
University of Washington uwashington-ig 15
University of Wisconsin InstaGENI wisconsin-ig 15

GENI Network stitching is possible between all of the above InstaGENI and ExoGENI sites. Example GENI stitching RSpecs are available here. For an example experiment that uses GENI Network Stitching, see this GENI Network Stitching Example page. To determine resource availability, refer to the InstaGENI Site Usage page. VLANs delegated to GENI stitching are tracked by ID here.

You may use any of the sample Stitching RSpecs referenced by this page. To modify an RSpec example to use a different site, simply do the following:

  1. In the node definition, replace the URN for the component_manager_id with the URN for your site.
  2. In the link definition, replace the name of the component_manager with the URN for your site.
  3. Modify all instances of the client_id and source_id or dest_id to be descriptive for your site.

Stitching Notes:

  • All existing compute resource types (raw-pc, VMs) are supported in stitched slivers.
  • Testing has verified most combinations for the sites listed. There is only one combination that does not work at this time: GPO ExoGENI to PG UKY.
  • To run stitching scenarios without the ExoSM for the GPO ExoGENI rack, use the stitcher option --noExoSM. If this option is not specified, than the request is submitted to the ExoSM aggregate.
  • Stitching RSpecs that include raw-pc sliver types must specify a capacity.
  • If any part of a sliver creation fails, the stitcher will delete the stitched sliver at each aggregate.
  • If you interrupt the stitcher sliver creation with GCF 2.8 or later, the stitcher will attempt to delete all slivers, but if you are using GCF 2.7 or earlier you must delete the sliver at each of the aggregates listed by the stitcher as part of the stitched path, and re-create the entire slice.

Additional Stitching Topologies

Complex and large topologies have been tested. A few RSpecs are provided here as examples that can be referenced and modified to be used at other sites:

Topology Description Sites in topology RSpec
Three nodes linear GPO IG <-> Utah PG <-> Utah IG stitch-3linear.rspec
Triangle topology Utah PG<->UKY PG<-> GPO IG <-> Utah PG stitch-triangle.rspec
Star topology Center=UtahDDC IG; Outer=UKY PG, Utah PG, Utah IG, GPO IG stitch-star-ddc.rspec

Is you are interested in setting up a GENI Stitching connection to a fixed endpoint, see the Fixed End Point Topology Using GENI Stitching page.

OpenFlow over GENI Network Stitching

InstaGENI racks that support GENI Network Stitching also support running hardware OpenFlow experiments over their stitched GENI network connections with the following restrictions:

  • Network stitching on the InstaGENI rack allocates and enforces link bandwidth, which cannot be modified by OpenFlow.
  • VLANs allocated to stitched connections on the rack cannot be modified, because InstaGENI rack switches operate in hybrid mode, preventing VLAN tag rewriting.

If you require some other type of dataplane connections for your OpenFlow experiment, please contact

GENI Stitching AL2S Path Mappings

Following is the list of GENI Stitching Site resources within AL2S as of 2016-07-22:

Router Interface Site VLAN Range xe-5/2/2.0 uvm-ig 1750-1799 et-3/0/0.0 vt-ig 4001-4015 et-3/1/0.0 clemson-og 3000-3009 et-8/0/0.0 ullafayette-ig 3980-3999 et-8/0/0.0 utdallas-ig 901-920 et-4/3/0.0 uky-ig 1810-1829 et-4/3/0.0 uky-pg 850-859,1800-1809 et-4/3/0.0 ukymcv-ig 1850-1869 et-4/3/0.0 ukypks2-ig 1830-1849 et-3/1/0.0 clemson-clab 3560-3574 et-4/3/0.0 clemson-ig 3560-3574 et-4/3/0.0 gatech-ig 3520-3534 et-4/3/0.0 sox-ig 3540-3554 et-4/3/0.0 utc-ig 3500-3514 et-2/3/0.0 iu-crest 2396-2399 et-3/3/0.0 cwru-ig 650-670 et-4/3/0.0 wsu-eg 1831-1840 et-3/3/0.0 missouri-ig 1150-1165 et-0/3/0.0 tamu-eg 940-949 et-3/3/0.0 kansas-ig 1170-1189 et-3/3/0.0 umkc-ig 1730-1744 et-2/3/0.0 hawaii-ig 1700-1719 et-2/3/0.0 cenic-ig 1550-1569 et-2/3/0.0 nps-ig 1680-1694 et-2/3/0.0 ucla-ig 1610-1629 et-2/3/0.0 usc 3224 et-3/1/0.0 iminds 1125-1164 et-7/3/0.0 gpo-eg 3741,3736-3739 et-7/3/0.0 gpo-ig 3596-3600,3706-3732,3746-3749 et-7/3/0.0 gpo-og 2611-2630 et-7/3/0.0 host-gpolab 2646 et-4/3/0.0 nysernet-ig 1700-1719 et-3/0/0.0 rutgers-ig 3730-3750 xe-8/0/0.0 ncsu2-eg 1761-1764 et-4/3/0.0 utah-stitch 2100-3499 et-4/3/0.0 uwashington-ig 2301-2315 et-1/0/0.0 uchicago-ig 3075-3094 et-1/0/0.0 umich-ig 4026-4040 et-1/0/0.0 wisc-clab 905-924 et-1/0/0.0 wisconsin-ig 930-944 et-7/0/0.0 northwestern-ig 2201-2215 et-9/0/0.0 illinois-ig 1760-1779 et-8/0/0.0 stanford-ig 1630-1644 et-1/3/0.0 wix 1700-1729 et-2/3/0.0 max 3020-3049 et-4/3/0.0 gwu-geni-cinema 724

Additional GENI Stitching paths not associated with sites, but are stitching endpoints:

Router Interface Next Hop VLAN Range et-4/3/0.0 chic-cr5 -1,1-4089 et-4/0/0.0 I2_Awave 2710-2719 et-7/0/0.0 sunn-cr5 -1,1-4089

If additional help is needed, please contact

Last modified 18 months ago Last modified on 06/19/17 16:12:22