[AusNOG] Anyone run across any incompatibilities between Telstra's NEC DSLAM's and Cisco ADSL routers?
ryan at apexn.com.au
Wed Nov 17 11:51:50 EST 2010
Hi Justin & ausnog,
We've experienced some similar issues with 877's across numerous wholesale
port suppliers (except Telstra) / DSLAM vendors for some customers using
this CPE. Everything would look in spec DSL stats wise and SYNC/Router
would just fall over for absolutely no reason. It just got to the point
that we had checked everything and it was just unexplainable.
We tried IOS upgrades/downgrades, DSLAM port swaps, different filters,
replaced internal cabling and in the end CPE replacement usually fixed it
(but sometimes for only a short period of time). Given the frustration of
seeing a 2 week old 877 getting swapped out one of our customers/partners
opened up the 877's. Inside were swollen and leaking capacitors.
Image Attached: http://www.apexn.com.au/ausnog/877_caps.jpg (2mbytes)
They have since opened a number of 877's up that were showing strange
behaviour and they all had the same cap problem. As a test, caps were
replaced and router stability issues went away.
To be totally honest, it's a pretty scary prospect and while this might
not be the cause of the problem you're experiencing it certainly weighs on
our minds when we start getting unexplained CPE behaviour.
More information about the AusNOG