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

[Chris Brown]

It's been a while since I looked at this stuff but they may be doing it for
exactly the same reason as server guys drop TTL's - They're looking at
moving some or all of those users to a new IP range (maybe on a new or
different CMTS) so they've dropped the lease time in the week leading up to
it so they don't end up with hundreds (or thousands) of isolated clients
with incorrect IP's.

Chris.



On 12 May 2017 at 12:41, Karl Hardisty <karl at mothership.co.nz> wrote:

> 5 minutes?
>
> Sounds like someone got confused between pre-move TTLs and DHCP lease
> times.
>
>
> On 12/05/2017, at 4:30 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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