ptm1.301

Has anybody using an unlocked modem that ptm1.301 is now connected all of a sudden?

Historically this has alway been in a state of 'connecting'

This connection seems to have its own IP address. A bit concerning, what on earth is it doing?

Anything in the log?

I dont have logs enabled, will try and start them going now.

Found a couple of other bits relating to this, seems im not the only person for which this is now happening.

Just been reading this...

Yep, one of the IPs (the source IP) in the log is an internal nonroutable IP address. BTs SNMP querying servers are in this range.

The IP address that the VDSL modem has assigned by DHCP on its �BT management interface� is a �routable� 30.X IP address!

Connection Name IP Address Subnet Mask Default Gateway
ptm1.301 30.119.X.X 255.255.248.0 30.119.X.X

Why would BT be assigning a routable (and not even owned by them!) address to VDSL modems? Seems more sensible to be using (as you note) the local private IP addresses for their CPE management network IPs.

I realise that it�s unlikely to cause problems to the end user as the modem is just bridged and can�t �usurp� traffic to that subnet.. but from a technical point of view it seems a bit weird.

In reply to a post by simon194:

From the latest updated version of SIN498 in the "CP provided modem" section (the up and coming self-install option):

"CPs or their EU�s will be responsible for maintaining the firmware of their Modems and monitoring their connectivity and performance, typically via a TR-69 interface using CPE WAN Management Protocol (CWMP)."

From my thread earlier. Makes sense after reading the SIN498 too. It seems ptm1.301 is now alive. Just ironic how I lost a lot of speed at the same time as ptm1.301 being connected, but unlikely to cause that.

Edited by Ixel (Mon 06-Aug-12 23:00:06)

In reply to a post by Ixel:

Just ironic how I lost a lot of speed at the same time as ptm1.301 being connected, but unlikely to cause that.

Why is it unlikely?

so can we disable it?

assume its not needed if its never been connected up unitil now....

In reply to a post by Ripley:

so can we disable it?

I did

assume its not needed if its never been connected up unitil now....

er.. I assumed I didn't need it.

thanks Batboy, will try n suss out how to disable it

http://forums.thinkbroadband.com/fibre/t/4145427-ip-...

Well, I couldn't see how ptm1.301 suddenly being enabled could cause nearly 6dB loss of noise margin, perhaps it did? If it did then it's extremely annoying. I suppose the best way to determine that would be to disconnect ptm1.301 and disable it?