[cisco-voip] Expressway cluster algorithm

[Brian Meade]

Is this for inbound B2B or for MRA?

If inbound B2B, it's more up to the caller's implementation of DNS.  If the
caller is Webex, their may be some documented behavior out there somewhere.

On Wed, Jan 23, 2019 at 4:17 PM Ryan Huff <ryanhuff at outlook.com> wrote:

> I’m trying to guarantee an active/passive use case; so maintenance mode
> would achieve that (or shutting one side down), but would require manual
> intervention, and be as clunky of a work-a-round as it gets for a runtime
> solution.
>
> -Ryan
>
> On Jan 23, 2019, at 16:00, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>
> I’m going to read the responses, but when I opened a TAC case, the
> engineer explained that there were at least two selection processes in
> play, which C (or E) to pick, then which neighbour to pick for the
> traversal.
>
> She said, if you want to be 100% sure during troubleshooting, that you are
> testing a particular path, you want to put the nodes you don’t want to use
> into maintenance mode.
>
> Made sense to me at the time.
>
> *-sent from mobile device-*
>
>
> *Lelio Fulgenzi, B.A.* | Senior Analyst
>
> Computing and Communications Services | University of Guelph
>
> Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON |
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>
>
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> On Jan 23, 2019, at 3:19 PM, Ryan Huff <ryanhuff at outlook.com> wrote:
>
> Can anyone explain or cite the documents that define the algorithm used to
> determine which Expressway node in a given cluster is selected to process a
> call.
>
> You can influence the selection with DNS SRV priority and weight, but does
> not appear to guarantee which cluster node is selected each time.
>
> Thanks,
>
> Ryan
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