Problem with vLAN across two data centers.

[CALEB FONYUY-ASHERI S]

Hello,

I created an experiment with nodes from two from APT and Clemson alongside a vlan for all nodes but once the experiment starts I realize that the clemson nodes can communicate with each other the same as the APT nodes but a Clemson node cannot contact an APT node. 

Please can you check what is causing the problem? 

Here is my experiment link: https://www.cloudlab.us/status.php?uuid=1ca24200-3383-11ef-9f39-e4434b2381fc

I faced this issue yesterday with a similar experiment and thought it was maybe a one time thing but it seems to be an issue. Sometimes the experiment completely fails with a message saying the Stitcher failed to complete. 

Thanks

Caleb

[Leigh Stoller]

> I created an experiment with nodes from two from APT and Clemson alongside a vlan for all nodes but once the experiment starts I realize that the clemson nodes can communicate with each other the same as the APT nodes but a Clemson node cannot contact an APT node.
>
> Please can you check what is causing the problem?

Hi. I have asked Clemson to take a look. Links between Utah and Wisconsin
are working, so might be something on the Clemson side.

We will let you know when we hear something.

Leigh

[CALEB FONYUY-ASHERI S]

Thank  you. Will be waiting for your feedback. 

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[CALEB FONYUY-ASHERI S]

Hi ,

I experienced a similar issue between apt and emulab with the following error:

Stitching Failed. Stitching failed due to: Circuit reservation failed at <Aggregate utah3-pg: https://www.emulab.net:12369/protogeni/xmlrpc/am/3.0>

Experiment link: https://www.cloudlab.us/memlane.php?uuid=f7fa100c-339f-11ef-9f39-e4434b2381fc

On Wed, Jun 26, 2024 at 3:51 PM Leigh Stoller <lbst...@gmail.com> wrote:

[Leigh Stoller]

> I experienced a similar issue between apt and emulab with the following error:
>
> Stitching Failed. Stitching failed due to: Circuit reservation failed at <Aggregate utah3-pg: https://www.emulab.net:12369/protogeni/xmlrpc/am/3.0>
>
> Experiment link: https://www.cloudlab.us/memlane.php?uuid=f7fa100c-339f-11ef-9f39-e4434b2381fc

Hi. The d820s (and the switch they are attached to) date back to 2012 and do
not support stitching. Try the d430s (I just ran a test between APT and a d430
that worked okay). More info about the various Cloudlab hardware is here:
https://www.cloudlab.us/portal-hardware.php

Leigh
ps: We are still waiting to hear about Clemson stitching

[CALEB FONYUY-ASHERI S]

Hi. 

Thank you for your feedback Leigh. 

Are there any other hardware that do not support stitching? So I can take that into account when creating my reservations. 

I don't really know how to get that information from the hardware list you just gave me. 

Caleb

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[Leigh Stoller]

> Thank you for your feedback Leigh.
>
> Are there any other hardware that do not support stitching? So I can take that into account when creating my reservations.
>
> I don't really know how to get that information from the hardware list you just gave me.

Sorry, didn’t mean to imply that info was available on that page, just wanted to
provide that so you know how old some of the Emulab cluster hardware is. I would
not expect any nodes from that time frame or before to work with stitching.

Leigh

[CALEB FONYUY-ASHERI S]

Okay thanks. 

Caleb

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