Opened 11 years ago
Last modified 11 years ago
#1039 new
Stitching slivers with Utah InstaGENI end point requires that capacity must be specified for link
Reported by: | lnevers@bbn.com | Owned by: | duerig@flux.utah.edu |
---|---|---|---|
Priority: | major | Milestone: | |
Component: | STITCHING | Version: | SPIRAL5 |
Keywords: | Network Stitching | Cc: | duerig@flux.utah.edu, Aaron Helsinger |
Dependencies: |
Description
In stitching scenarios where Utah InstaGENI is the endpoint, requesting a sliver to any other remote (ex GPO IG, KY PG, etc) will result in the following create sliver failure:
*** ERROR: vtopgen: Cannot mix trivial_ok|emulated with * bw
This is due to not specifying capacity in the link properties when the endpoint in the stitched sliver is at InstaGENI Utah (not an issue when the endpoints are at PG Utah). This issue was reported via email and remains unresolved, so it is now being tracked.
On 5/31/13 1:00 PM, Jonathon Duerig wrote:
This seems nontrivial to me. I've cc'ed geni-dev-utah to see if others have input. The problem here is transit stitching. One endpoint is at IG Utah, the other is at another rack and Utah PG sits in the middle. If there is no specified bandwidth for the piece that flows across Utah PG, it doesn't seem like we can have a reasonable default. The enforcement of bandwidth limitations is at the endpoints so they are the ones who determine what the bandwidth is. So we are left with either the user explicitly specifying bandwidth so we have some confidence that the endpoints are shaping it according to that bandwidth, or we need a behind the scenes agreement on defaults which seems tricky to do. Or am I missing something?
On 5/31/13 2:53 PM, Robert Ricci wrote:
This is probably where the mismatch lies; we make the assumption that limits are enforced by the endpoints, whereas other circuit services (ION comes to mind) enforce bandwidth limits themselves, within the network.
Change History (3)
comment:1 Changed 11 years ago by
Component: | GPO → STITCHING |
---|---|
Keywords: | Network Stitching added |
comment:2 Changed 11 years ago by
Cc: | duerig@flux.utah.edu Aaron Helsinger added |
---|
comment:3 Changed 11 years ago by
Owner: | changed from somebody to duerig@flux.utah.edu |
---|
Note: See
TracTickets for help on using
tickets.