Token ring? topic hijack: was Re: Mystery open source switching

Justin M. Streiner streiner at
Wed Nov 3 16:42:47 CDT 2010

On Mon, 1 Nov 2010, Nick Hilliard wrote:

> On 01/11/2010 15:21, Greg Whynott wrote:
>>  you recently converted from token ring to ethernet?   i had no idea
>>  there was still token ring networks out there,  or am i living in a
>>  bubble?
> Sadly, you're living in a bubble.  As long as there are banks and very large 
> commercial institutions, there will be legacy installations. Including t/r. 
> And OS/2.  And windows NT 3.51.  And FDDI and X.25 and every single legacy 
> protocol, type of hardware and ancient operating system that ever existed.

The only example of a technology that comes to mind straight away that 
truly died out is/was SMDS, though I'm sure there are are a few others. 
>From what I remember, only a handful of telcos offered SMDS back in its 
heyday (mid-90s), and most, if not all of those no longer offer it.  I 
recall seeing some tariff filings from Verizon some time ago where they 
were planning to shut the service off because the customers that used it 
had been migrated to other technologies and some of their vendors had 
already dropped support for it.


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