[AusNOG] Optus NBN HFC lease time 5 minutes....

[Mark Smith]

There shouldn't be enough packet loss for this to occur.

If there is, then it may be the first visible sign of other problems that
will exist that are being hidden by packet loss recovery mechanisms e.g.
TCP retransmits,  DNS over UDP retransmits. They incur delays, meaning
interactive performance of applications may also be suffering. The
interactive performance might be tolerable with these delays, but it may
not be within the transaction ideal of 100ms.

Regards,
Mark.



On 15 May 2017 09:22, "Tim Jones" <tim8021q at gmail.com> wrote:

> For the lab testing, NBNCo do request access seekers to set 5 minute DHCP
> lease time (and 5 minute PPPoE keep-alive timeouts) as part of
> certification testing.
>
> Maybe this temporary lab config has made it to production (intentionally
> or otherwise).
>
> Cheers,
> Tim
>
>
> On Fri, May 12, 2017 at 2:30 PM, Craig O'Toole <cotoole at remex.com.au>
> wrote:
>
>> Anyone from Optus looking after NBN HFC on the list?
>>
>> Just been investigating an issue where one of my clients have an Optus
>> NBN HFC service. Optus is delivering dynamic IPs with a lease time of 5
>> mins....
>>
>> Half life of 2.5 mins getting occasionally dropped, too short a half life
>> for any re-tries. Several re-numbers a day... Killing Voice calls, (and
>> Netflix) and making IPSEC VPN almost unusable with DDNS.
>>
>> Can't be good for anyone, let alone the DHCP servers load....
>>
>> I am happy to confirm and assist diagnosis, and if anyone has a contact
>> at Optus in the team looking after this part of the design please send me a
>> contact so I may assist.
>>
>> Cheers
>>
>> Craig
>>
>>
>>
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