In message <CAE_aTPPCPXMN-Rx2zRjG7FcbyDSqaT=gR7Hc6+ZhRj0Pmtsvxg@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: marka@isc.org