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SRV weights and priorities do influence the selection, but do not guarantee. The accepting peer can pass to the other peer if the other peer is less utilized.<br>
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On Jan 23, 2019, at 16:35, Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<br>
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<div dir="ltr">Gotcha. IIRC, you can’t put weight on traversal neighbours.
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<div>So you can use dns srv record weights to pick the C out or the E in, but once inside the cluster picking the next hop E (or C) is round robin. </div>
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<div>Interested to hear comments. <br>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></span></p>
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On Jan 23, 2019, at 4:17 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com">ryanhuff@outlook.com</a>> wrote:<br>
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<div>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.<br>
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<div dir="ltr">-Ryan</div>
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On Jan 23, 2019, at 16:00, Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<br>
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<div dir="ltr">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.
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<div>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. </div>
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<div>Made sense to me at the time. <br>
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On Jan 23, 2019, at 3:19 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com">ryanhuff@outlook.com</a>> wrote:<br>
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<div><span>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.</span><br>
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<span>You can influence the selection with DNS SRV priority and weight, but does not appear to guarantee which cluster node is selected each time.</span><br>
<span></span><br>
<span>Thanks,</span><br>
<span></span><br>
<span>Ryan</span><br>
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