[AusNOG] Repeated NBN traffic flow issue

[Serge Burjak]

There is a Mikrotik firmware update today, 6.36.3 . One of the things
it fixes is, 'arp - fixed crash that caused Ethernet frames to go out
via wrong interface' . Not sure if it's related.

On 8 September 2016 at 11:47, Philip Loenneker
<Philip.Loenneker at tasmanet.com.au> wrote:
> An update for those interested…
>
>
>
> We got some tech savvy  people who were experiencing the issue. They plugged
> a Windows PC into the NTD allowed it to get DHCP with no issue. Going back
> to a Mikrotik router has the problem. Changing interface on the Mikrotik (to
> change the MAC address) showed the same problem. So I’m currently leaning
> toward sit being the same (or similar) issue as Patrick pointed out from
> this AusNOG post back in December:
>
> http://lists.ausnog.net/pipermail/ausnog/2015-December/033838.html
>
>
>
> We are seeing similar issues on Netgear and other CPEs. But it is very
> inconsistent – the exact same routers with the same firmware on other
> services work fine. And these services all worked ok 24 hours ago. If this
> is the issue from the post above, then it appears it is appearing via a
> firmware update on the NTD, not just a hardware update.
>
>
>
>
>
> From: Philip Loenneker
> Sent: Thursday, 8 September 2016 11:05 AM
> To: ausnog at lists.ausnog.net
> Subject: RE: [AusNOG] Repeated NBN traffic flow issue
>
>
>
> Thanks Brendan. Were those fibre or wireless services?
>
>
>
> From: Brendan Halley [mailto:brendan at halley.net.au]
> Sent: Thursday, 8 September 2016 10:57 AM
> To: Philip Loenneker <Philip.Loenneker at tasmanet.com.au>
> Cc: ausnog at lists.ausnog.net
> Subject: Re: [AusNOG] Repeated NBN traffic flow issue
>
>
>
> I have had this issue personally at two different residences in Tasmania on
> multiple occasions.
>
> The only fix I have found is cutting the power to the NTD for ~1 hour then
> connecting it again and everything seems to work normally. I haven't been
> able to narrow down the conditions it requires to occur as it's seemingly
> random.
>
> Brendan
>
>
>
> On 8 Sep 2016 9:14 AM, "Philip Loenneker" <Philip.Loenneker at tasmanet.com.au>
> wrote:
>
> Hi all,
>
>
>
> A regular problem we have with our fibre and wireless NBN tails is that we
> get what appears to be one-way traffic. We see DHCP requests from the CPE
> (we use IPoE), we respond to them, but the CPE does not get the response. We
> have confirmed this on several occassions with packet captures at the NTD. I
> think we’ve had over 20 cases this year, and we appear to have gotten 4
> cases in the past 24 hours. These are services that were working fine, and
> suddenly stopped. Lodging tickets with NBN is usually very drawn out, with
> the services ending up back online eventually, with responses that range
> from “we detected a problem and fixed it” to “everything checked out ok, no
> issues” but they mysteriously start working again. Naturally, we do things
> like isolation tests, port resets, change of CPE etc.
>
>
>
> Has anyone else had any similar issues? Does anyone have any tips they can
> provide to help us expedite resolution to these issues? I’m sure it’s no
> surprise to everyone on this list that the customers get angry at us for
> poor service, despite our part of the connection working correctly.
>
>
>
> Regards,
>
> Philip
>
>
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