[c-nsp] 28xx and a DS3

[Bruce Robertson]

At one end I have a Cisco 7206, so that's plenty of horsepower.  The 
other end is going to a 2924XL switch, which is used to insert VLAN tags 
from various servers and routers.  (The T3SU preserves 802.1Q VLAN tags 
just fine.)

I doubt you could get line rate out of a 2811, especially with 
encryption, but you can spend all that money you've saved on DS3 
interface cards to purchase faster routers.

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:
> 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
>>
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>>
>> Guardian Mortgage Documents
>>
>>
>>
>> 303-942-2019
>>
>> emergency (GMD Help Desk): 303-942-2002
>>
>> chris.moore at gmd.com
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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