[c-nsp] 28xx and a DS3

Wed Apr 5 14:41:13 EDT 2006

Along a similar line of inquiry, does anyone have suggestions on an
affordable way to split a channelized DS3 into Ethernet VLANs?

Peter Kranz
Founder/CEO - Unwired Ltd
www.UnwiredLtd.com
Desk: 510-868-1614 x100
Mobile: 510-207-0000
Fax: 510-217-6031
pkranz at unwiredltd.com 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Chris Moore
Sent: Wednesday, April 05, 2006 11:30 AM
To: Bruce Robertson
Cc: Tony Racz; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 28xx and a DS3

Thanks Bruce,

Yeah, I have another DS3 that's using T3SUs and Netscreen firewalls. I
have thought of using T3SUs to save a few bucks. It still seems that I
need the same sort of router performance either way, no?

What model routers do you put on either end? Are you running full-rate?
You're not encrypting the traffic, are you?

Thanks for your help,

Chris

-----Original Message-----
From: Bruce Robertson [mailto:bruce at greatbasin.net]
Sent: Wednesday, April 05, 2006 11:32 AM
To: Chris Moore
Cc: cisco-nsp at puck.nether.net; Tony Racz
Subject: Re: [c-nsp] 28xx and a DS3

What we do here is use any old routers with Fast Ethernet interfaces,
and
terminate the DS3 at both ends with either the Adtran T3SU with the
Ethernet
interface card.  The T3SU has good out-of-band Ethernet management, and
if you
get the newer version of the T3SU, it even has a built-in modem for
backup
out-of-band management.  The T3SUs are readily available on eBay, though
I
usually end up having to order the Ethernet interface cards from a
distributor.

This solution is MUCH cheaper than a Cisco DS3 interface card, let alone

having to upgrade to a more advanced router.

Let me know if you need more information on exactly what to get.

(You used to be able to do the same thing with the
Net2Net/Paradyne/Zhone
DSE4500, but that product has been discontinued, and didn't have as good

management.)

--
Bruce Robertson, President/CEO                           +1-775-348-7299
Great Basin Internet Services, Inc.    company-wide fax: +1-775-348-9412
http://www.greatbasin.net                       my efax: +1-775-201-1553

Chris Moore wrote:
> Hi all,
>
>
>
> I work for a company that SERIOUSLY pinches pennies on network gear
and
> am trying to spec routers for both ends of a point-to-point DS3. Cisco
> is pretty clear - I need at least a 3800 series. But I'm leery of
> Cisco's recommendations - it always seems like they're trying to
up-sell
> me. Same (even worse) with my reseller. As an example, Cisco says a
2811
> is only good for two T1s but I have them in my environment running 4
> encrypted T1s without breaking a sweat.
>
>
>
> I've been looking at various specs and they're confusing and often
> conflict. I've seen specs of encryption performance of more than
130Mbps
> with the addition of a AIM VPN card and 200 to 250Kpps (100Mbps+ w/ 64
> byte packets) max throughput for 2800 series routers. That makes it
look
> to me like it should be able to handle a DS3 pretty easily.
>
>
>
> These routers won't be doing much in terms of services. They'll be
> running a single instance of OSPF with a pretty small route table
(<100
> routes), be encrypting traffic across the link and possible (but not
> necessarily) some basic ACLs and/or QoS.
>
>
>
> My question is, has anyone tried this? What was your experience?
>
>
>
> Thanks,
>
>
>
> Chris
>
>
>
> _________________________________________
>
> Chris Moore
>
> Senior Network Engineer
>
> Guardian Mortgage Documents
>
>
>
> 303-942-2019
>
> emergency (GMD Help Desk): 303-942-2002
>
> chris.moore at gmd.com
>
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>
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>
>
>
>
>
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