In message <CAE_aTPPCPXMN-Rx2zRjG7FcbyDSqaT=gr7hc6+zhrj0pmts...@mail.gmail.com> , david peahi writes: > In my neck of the woods, critical locations often exist "in the middle of > nowhere", resulting in underserved facilities, where best effort networks > such as metro Ethernet cannot be trusted to remain available 24x7x365. Many > times, during prime business hours, I will see a telco metro Ethernet > spanning tree convergence which results in my traffic re-routing for 20-30 > seconds over my private backup network path, then switching back to the > metro Ethernet path after the telco technicians have finished their > maintenance. Several times when I have called in a trouble ticket, the > telco tech has asked "what is the big deal, it was only a 20 second > outage?". In the Enterprise environment, a planned spanning tree > convergence in the middle of business hours is one of the quickest ways for > a network engineer to be relieved of their duties, but apparently the bar > is considerably lower in the telco environment. > Not only that, but the telco SLAs associated with metro Ethernet are > totally bogus, with a best round trip SLA of 20 milliseconds, ranging up to > 50 milliseconds for "bronze" service. For short distances of 100 miles or > less (rule of thumb is that light travels over fiber at 0.80 x speed of > light, or 1000 miles in 10 milliseconds), an SLA of 20-50 milliseconds > amounts to fraud, just another way for the telcos to scam the consumer. > The tone of many of the entries on this thread where the user is depicted > as being unreasonable, underscores the need for a coordinated national > broadband policy in the USA, based upon the Australian model in which the > government is building out fiber to every residence and business, no matter > where they are located.
The NBN is to be delivered over a mixture of fibre (93% of homes), wireless and satellite services[1]. [1] http://www.nbn.gov.au/about-the-nbn/what-is-the-nbn/ > Regards, > > David -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org