Re: "Is TDM going the way of dial-up?"
Rick Ernst <nanog@shreddedmail.com> wrote:
I've noticed over the last 3 years or so that TDM, specifically T-1, access and transport has been in a steady decline. Customers are moving to FTTH and cable, or going WiMAX and Metro-Ethernet. Ethernet seems to have taken an even bigger bite out of DS-3. The bigger pipes seem to favor ethernet. A recent upgrade from OC-3 to GigE transport actually saved us a large chunk of money.
I'm wondering if others are seeing the same behavior, if it's market-dependant, or if I'm just imagining things.
Unfortunately what you are seeing is indeed where the world is going, and it is extremely painful to watch. My personal preference is the direct opposite of that: Ethernet for non-LAN use is my very antithesis, I hate it to the core of my being. V.35/HDLC forever for me! I will continue using HDLC over traditional synchronous serial WAN media for as long as I am alive. MS P.S. This message is being sent from a VAX running a variant of 4.3BSD (Quasijarus). Almost the entire ARPA Internet software stack that's running on my VAXen is mostly unchanged from how it was in 1988.
Date: Fri, 26 Mar 2010 16:43:23 GMT From: msokolov@ivan.Harhan.ORG (Michael Sokolov)
Rick Ernst <nanog@shreddedmail.com> wrote:
I've noticed over the last 3 years or so that TDM, specifically T-1, access and transport has been in a steady decline. Customers are moving to FTTH and cable, or going WiMAX and Metro-Ethernet. Ethernet seems to have taken an even bigger bite out of DS-3. The bigger pipes seem to favor ethernet. A recent upgrade from OC-3 to GigE transport actually saved us a large chunk of money.
I'm wondering if others are seeing the same behavior, if it's market-dependant, or if I'm just imagining things.
Unfortunately what you are seeing is indeed where the world is going, and it is extremely painful to watch. My personal preference is the direct opposite of that: Ethernet for non-LAN use is my very antithesis, I hate it to the core of my being. V.35/HDLC forever for me! I will continue using HDLC over traditional synchronous serial WAN media for as long as I am alive.
MS
P.S. This message is being sent from a VAX running a variant of 4.3BSD (Quasijarus). Almost the entire ARPA Internet software stack that's running on my VAXen is mostly unchanged from how it was in 1988.
Much as I love Sonet and the like, I will channel Randy and say that I hope all of my competitors do this. (OK. We really don't have competitors.) And, if you are using a 1988 TCP stack on a 4.3 system, you are not likely to ever efficiently utilize a higher speed link and will not behave well on any link. TCP has come a long way in the past 12 years. (Of course, I can't guess what "mostly unchanged" means.) -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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msokolov＠ivan.Harhan.ORG