[AusNOG] Optus routing/internet issues

[Mark Dignam]

Yah, here's me thinking I was alone.  Let put what I added to their service
portal early this morning....  (after encountering the same head-banging as
you)

> We have two external IP feeds, one via Telstra (AS1221) and one via Optus
(AS7474), DC Two is AS132145. 
> Using BGP AS-path stacking, we balance the inbound feed between the two,
and use a round-robin for 
> outbound path selection.

> Something broke within either Optus or Telstra last night around 19:00
Perth time (that's +0800GMT), with
> one of the providers  "stealing" our BGP routes which stopped us seeing a
large of the internet. If I turned 
> off the Telstra pipe, nothing changed. If I turned off the Optus pipe,
everything came back. (well, mostly 
> everything) So I left it like that for overnight.

> Now, I currently have "deny all" filters for both inbound and outbound in
place on our BGP config for Optus. 
> The only place you can see a path to AS132145 is via AS1221 according to
various Looking Glasses around the world.

> The issue is that external clients with Optus connections (NBN, Mobile and
Fixed data) can not connect to us, 
> they are NOT being sent via a path to Telstra, they are being blocked from
accessing AS132145.

Mark.

-----Original Message-----
From: AusNOG <ausnog-bounces at ausnog.net> On Behalf Of DaZZa
Sent: Friday, 24 June 2022 11:02 AM
To: AusNOG Mailing List <ausnog at ausnog.net>
Subject: [AusNOG] Optus routing/internet issues

Greetings learned folk.

I'm hesitant to send this, as it's very imprecise, so I apologise to anyone
who gets annoyed at someone obviously groping in the dark, but here goes...

Is anyone seeing routing or traffic issues with Optus services today?
I have an Optus service which appears to be only partially advertising my
BPG somehow - resulting in very intermittent inbound traffic.The
advertisements seem right, the BGP peering is up, the routes are advertised
- the only hard indicator is that the Optus link is carrying much less
traffic than is usual for this time of day.

Traces inbound are showing paths via my secondary link which shouldn't be
happening (BGP advertising is setup to direct the majority of traffic -
except for the second link's peers - through the primary) from some
locations overseas and through the Optus link

Attempts to log a fault with Optus have resulted in much frustration and
head banging on desk - however I have an anecdotal comment from one of the
Optus people I have got some sense out that they have been hearing of a lot
of issues with internet services today.

Anyone seeing anything that might match this depressingly nebulous fault
description? I know there's not a lot of information, but I don't have a lot
more other than people can't connect to various IP's in my advertised block,
and some traceroutes which are less than informative.

Thanks to anyone who can shed any light.

Darren
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