[AusNOG] Contact at GTT for a routing issue

[Lincoln Dale]

On Thu, May 9, 2024 at 7:35 PM Elliott Willink <elliott at willink.net.au>
wrote:

> 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?
>
> 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.
>

How about you post the prefix in question that you see looping and then
others can maybe look deeper into it.
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?

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.
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.
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