RE: Peering point speed publicly available?

["Cody Lerum" <clerum () transaria com>]

Very true..

Work with the network operators on each side of the link to determine the speed/load. For the most part if they really 
want your business, they will be able to provide something.

The main reason link speed maybe important to me would serialization delay on the circuit. OC-768 should be much lower 
latency than a T1...unless your are at the end of the queue :-)

Latency is probably be your primary concern for large TCP transfers anyway.

-C

-----Original Message-----
From: Tony Li [mailto:tony.li () tony li] 
Sent: Thursday, July 01, 2004 7:02 PM
To: Cody Lerum
Cc: erik () myevilempire net; nanog () merit edu; network.support () oati net
Subject: Re: Peering point speed publicly available?


Is it really important to know the link speeds?  What good does it do 
without knowing
about the loading on those links?

I would MUCH rather have an empty T1 than have to contend with a very 
oversubscribed OC-768.

Tony



On Jul 1, 2004, at 5:25 PM, Cody Lerum wrote:

> DNS can sometimes give you a hint
>  
> [my nets snipped]
>  4 t3-1-2-0.ar2.SEA1.gblx.net (64.211.206.113)  20.436 ms  18.309 ms  
> 17.605 ms   <------------DS3
>   5  so1-0-0-2488M.ar4.SEA1.gblx.net (67.17.71.210)  17.607 ms  16.982 
> ms  16.971 ms  <-----OC-48
>  6  p3-3.IR1.Seattle-WA.us.xo.net (206.111.7.5)  17.864 ms  19.491 ms  
> 17.181 ms
>  7  p5-1-0-3.RAR1.Seattle-WA.us.xo.net (65.106.0.197)  17.723 ms  
> 17.632 ms  19.045 ms
>  8  65.106.0.50 (65.106.0.50)  38.133 ms  39.197 ms  49.961 ms     
> MPLS Label=101549 CoS=0 TTL=1 S=1
>  9  p0-0-0d0.RAR1.SanJose-CA.us.xo.net (65.106.1.61)  37.669 ms  
> 38.572 ms  36.517 ms
> 10  p7-0.DCR1.DC-SanJose-CA.us.xo.net (65.106.2.146)  37.830 ms  
> 36.524 ms  37.743 ms
> 11  ge1-1.CDR2.DC-SanJose-CA.us.xo.net (209.220.168.10)  38.428 ms  
> 38.050 ms  37.179 ms <-----Gig Ethernet
> 12  205.158.6.100.ptr.us.xo.net (205.158.6.100)  40.179 ms  39.784 ms  
> 39.444 ms
> 13  x218.cd9e6c.sj.concentric.net (205.158.108.218)  39.188 ms  39.723 
> ms  39.895 ms
>  
> However MPLS hidden hops may hide internal paths, and any connection 
> may be limited to slower than its line rate, and dns entries may be 
> old....
>  
> It's not publicly available at one source that I'm aware of, and if 
> there is they don't have my info.
>  
> -C
> From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf 
> Of Erik Amundson
> Sent: Thursday, July 01, 2004 6:10 PM
> To: nanog () merit edu
> Cc: network.support () oati net
> Subject: Peering point speed publicly available?
>
>
> NANOG,
>
>  
>
> I have a question regarding information on my ISP's peering 
> relationships.  Are the speeds of some or all peering relationships 
> public knowledge, and if so, where can I find this?  By speed, I mean 
> bandwidth (DS3, OC3, 100Mbps, 1Gbps, etc.).  I am trying to transfer 
> large stuff from my AS, through my ISP, through another ISP, to 
> another AS, and I'm wondering how fast the peering point is between 
> the ISPs.  I'm working with my provider to get this information as we 
> speak, but I'm wondering if it's available publicly anywhere.  If it 
> were, this could be one way to evaluate providers in the future, I 
> guess...
>
>  
>
> Erik Amundson
> A+, N+, CCNA, CCNP
> IT and Network Manager
> Open Access Technology Int'l, Inc.
> Phone (763) 201-2005
> Fax (763) 553-2813
>  mailto:erik.amundson () oati net
>
>