<div dir="ltr"><div dir="ltr">On Thu, May 9, 2024 at 7:35 PM Elliott Willink <<a href="mailto:elliott@willink.net.au">elliott@willink.net.au</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-7414802151279451787">
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Sorry for the noise - possibly a long shot but does anyone have a contact at GTT who may be able to assist resolve routing issues with US traffic?</div>
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NOC emails get a generic replying saying they are investigating on loop, NOC phone number seems to be disconnected and their general phone number won't do anything without a service ID. </div></div></div></blockquote><div><br></div><div>How about you post the prefix in question that you see looping and then others can maybe look deeper into it.</div><div>Did you also check to see that its legitimate in various looking glasses and e.g. do you see the same in ripe probes or similar?</div><div><br></div><div>There are definitely cases where loops can/do happen beyond being transient. Router software bugs ("stuck bgp routes" / "timing race conditions on programming hardware") can/do/have happened, but are less common these days.</div><div>But if its your prefix that you control, you can probably resolve it either by withdraw/re-announce of it, changing a transitive attribute that forces a refresh of it, possibly doing so via announcing either a more-specific or less-specific to backstop it.</div><div><br></div><div> </div></div></div>