Date: Sun, 5 Sep 2004 16:46:31 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: <alex@pilosoft.com> Cc: freebsd-atm@freebsd.org Subject: RE: Question on ATM w/ FreeBSD Message-ID: <LOBBIFDAGNMAMLGJJCKNEEECEPAA.tedm@toybox.placo.com> In-Reply-To: <Pine.LNX.4.44.0409050832090.28390-100000@bawx.pilosoft.com>
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> -----Original Message----- > From: alex@pilosoft.com [mailto:alex@pilosoft.com] > Sent: Sunday, September 05, 2004 5:49 AM > To: Ted Mittelstaedt > Cc: freebsd-atm@freebsd.org > Subject: RE: Question on ATM w/ FreeBSD > > > > All of these are only egress DSL. No backbones (in this area at least) > > provision over ILEC atm clouds. > FYI- VZ sells IP over their ATM cloud. Genuity/L3 used to do same, not > sure if they still do. > None of the backbone providers we considered had a NI into either the Qwest or Verizon ATM clouds here, I made sure to ask that so as to deal with that scenario early before some smartass here got sidetracked on this "great idea" of how to save money by bringing Internet feed in on the DS3's we were already paying for. Fortunately because of this I had an excuse. > > come into our DS3. I had to determine that by trial and error. I still > > don't know exactly the optimal values for the burst rate. 120 seems to > > work with Cisco IOS but nobody at Verizon could tell me how their atm > > switches were configured for DSL. > Its UBR - no burst or whatever rates necessary to configure. > Damn! I'll have to try that. I guessed vbr because that is how Qwest provisions it. So, since you know something about Verizon, do you happen to know why their latest Westell modems that they ship out identify themselves as Token Ring devices not Ethernet devices when they attempt to obtain IP numbers via DHCP? We got a laugh out of that one. :-) > > > If your card does not support VPI 1, you need a small ATM switch to > > > move ATM PVCs from one VPI to another. Fore ASX-200BX is excellent > > > small and cheap switch. > > > > > > > Are any of the cards mentioned - Fore LE155, PCA-200, HE155, not support > > VCI 1? > PCA-200 doesn't support non-zero VPI on linux. I don't know if its a card > limitation or linux driver limitation. > > > The switch chassis themselves are cheap enough on Ebay. But where you > > run into trouble is the DS3 cards for them usually aren't included with > > the switches, and are a lot harder to find secondhand. Not impossible, > > though, but rarer. > True true, ds3 for ASX are rare. I scored couple of them at 100$, but you > may have to wait some time... > > > And I don't much care about the supported/unsupported aspect of the > > equipment I use anyway. I'm the first line of support here. And the > > user community like the mailing list here, is the second line. And it > > doesen't make a lot of sense to spend $2K a year on a support contract > > with Cisco for a used 7206 that you bought off Ebay. For starters you > > don't get hardware support anyway, and secondly, I've used Cisco support > > enough times in the past to know that they aren't much good for the > > truly knotty problems. If we are buying used Fore switches/atm cards/ > > etc. I am not expecting any more support than a copy of the > user manual. > > Remember this is all going into a FreeBSD router that will be running > > BGP, so I'm already on my own for support there, anyway. > Well, I meant 'supported' as in 'software is still being developed' and > 'it is not obsolete'. Obviously nobody here is buying official vendor > support. Nevertheless, for 'supported' hardware, you will find better > luck with documentation, more people running it in the field, and > a chance > that you'll find software that does somewhat modern things... > All true. > > The Lucent PSAX gear I've seen on the secondary market, some of it is > > going for under $100. Compared to a used Fore ASX200BX at $800+, to me > > that is worth screwing with it - that is, if anyone can possibly confirm > > that the PSAX even is an ATM switch. > I never used PSAX - but it is marketed as ATM termination device, not > switch. Lucent wanted you to buy CBX as small ATM switch. Looking at docs > I could find it seems that you can use it as atm switch too [1] > > http://www.govcommerce.com/pdf/Lucent/lucent-psax-1250ds.pdf > www.lucentdocs.com search for PSAX 1000 or 1250 > Yeah, I already read that and thought the same thing. But I think the PSAX 1000 is considerably different than the PSAX 100 as I think Lucent added a lot of stuff to it's firmware. Someone else on this list mentioned the PSAX 100 could only handle bridged VCs not routed. Ted > -- > Alex Pilosov | DSL, Colocation, Hosting Services > President | alex@pilosoft.com (800) 710-7031 > Pilosoft, Inc. | http://www.pilosoft.com > >
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