[AusNOG] Contact at GTT for a routing issue

Fri May 10 11:13:46 AEST 2024

Dear Elliott

It is always my pleasure to help out fellow Australian Network Owners where I can…. Plus it helps knowing the right people to ask the right question to get things fixed…

Kindest Regards

James Braunegg

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1300 769 972<tel:1300%20769%20972> / 0488 997 207<tel:1300%20769%20972>

james.braunegg at micron21.com<mailto:james.braunegg at micron21.com>

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From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of Elliott Willink
Sent: Friday, 10 May 2024 8:45 AM
To: Lincoln Dale <ltd at interlink.com.au>
Cc: AusNOG at lists.ausnog.net
Subject: Re: [AusNOG] Contact at GTT for a routing issue

Thanks everyone who responded, this is now sorted.

Special thanks to James @ Micron21 who managed to work some magic for us and get this resolved.
________________________________
From: Lincoln Dale <ltd at interlink.com.au<mailto:ltd at interlink.com.au>>
Sent: Friday, May 10, 2024 7:55 AM
To: Elliott Willink <elliott at willink.net.au<mailto:elliott at willink.net.au>>
Cc: AusNOG at lists.ausnog.net<mailto:AusNOG at lists.ausnog.net> <ausnog at lists.ausnog.net<mailto:ausnog at lists.ausnog.net>>
Subject: Re: [AusNOG] Contact at GTT for a routing issue

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