[AusNOG] Hobart NBN POI - latency and packet loss issues

[Damian Ivereigh]

Hi all,

Does anyone out there connect directly to the Hobart NBN POI - as in not 
through a wholesaler, they have their own NNI. Or has anyone seen a 
similar issue in another POI?

We are seeing an intermittent increased latency (normally 2ms increases 
to 18ms) and about 3% packet lost to all our AVC's on that POI through 
two separate CVCs.

1) We have excluded all our equipment from causing the latency increase 
(i.e. no buffers anywhere).

2) The time that the issues occurs matches peak load, but not our peak 
load. This morning it started at 10:45 before we were are even 50% 
utilisation. We assume this is due to the holiday and the residential 
traffic. Normally it doesn't start until 6pm.

3) We have plenty of capacity and anyway capacity limits would not lead 
to increased latency - only buffering can do that (and NBN isn't 
supposed to buffer - just strictly police).

4) We are unclear if the issue is on the POI as a whole, or some 
grouping of NNIs - note 2) above excludes our individual NNI being in play.

5) We also connect to the Launceston POI, and are not seeing any of 
these issues using a lot of common infrastructure (which further 
excludes our network).

We have engaged NBN but have so far been unable to get any useful 
response or even acknowledgment that there is an issue.

Thoughts anyone?

Damian

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