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captain456

@gci.net

reply to timburke

Re: [Connectivity] ibone vs cbone

said by timburke:

The 'cbone' is Comcast's internal network. You'll hit that going to another Comcast customer, between Comcast POPs.
Tracing route to te-8-3-ar01.capitolhghts.md.bad.comcast.net [68.86.72.2]
over a maximum of 30 hops:
 
  1     1 ms    <1 ms    <1 ms  172.20.15.1
  2     *        *        *     Request timed out.
  3     9 ms    10 ms    10 ms  ge-1-39-ur01.romeoville.il.chicago.comcast
.net [68.86.118.229]
  4    12 ms    11 ms    12 ms  te-8-2-ar02.elmhurst.il.chicago.comcast.ne
t [68.87.231.90]
  5    14 ms    14 ms    14 ms  te-2-1-ar01.area4.il.chicago.comcast
.net [68.87.230.121]
  6    13 ms    14 ms    14 ms  te-4-1-cr01.chicago.il.cbone.comcast
.net [68.86.72.33]
  7    22 ms    22 ms    22 ms  te-1-1-cr01.cleveland.oh.cbone.comca
st.net [68.86.68.21]
  8    22 ms    30 ms    30 ms  te-1-1-cr02.pittsburgh.pa.cbone.comc
ast.net [68.86.68.118]
  9    42 ms    42 ms    43 ms  te-2-1-cr01.mclean.va.cbone.comcast.
net [68.86.68.126]
 10    50 ms    50 ms    48 ms  te-8-3-ar01.capitolhghts.md.ba
d.comcast.net [68.86.72.2]
 

The 'ibone', however, is Comcast's bandwidth network. It also is what goes between POPs to get you to bandwidth providers/other peering partners.
Tracing route to softlayer.com [66.228.118.53]
over a maximum of 30 hops:
 
  1    <1 ms    <1 ms     3 ms  172.20.15.1
  2     *        *        *     Request timed out.
  3    10 ms     8 ms    10 ms  ge-1-39-ur01.romeoville.il.chicago.c
omcast.net [68.86.118.229]
  4    10 ms    10 ms    10 ms  te-8-2-ar02.elmhurst.il.chicag
o.comcast.net [68.87.231.90]
  5    11 ms    11 ms    12 ms  te-2-1-ar01.area4.il.chicago.comcast
.net [68.87.230.121]
  6    16 ms    15 ms    13 ms  68.86.90.49
  7    35 ms    41 ms    38 ms  pos-0-0-0-0-cr01.indianapolis.in.ibo
ne.comcast.net [68.86.85.58]
  8    49 ms    51 ms    48 ms  pos-0-14-0-0-cr01.dallas.tx.ibone.comcast.net [6
8.86.85.153]
  9    42 ms    42 ms    50 ms  te1-2.cer02.dal01.dallas-datac
enter.com [75.149.228.34]
 10    50 ms    51 ms    51 ms  po2.dar02.dal01.dallas-datacenter.co
m [66.228.118.207]
 11    49 ms    49 ms    51 ms  po2.slr01.dal01.softlayer.com
[66.228.118.142]
 12    50 ms    50 ms    50 ms  www.softlayer.com [66.228.118.53]
 

Hope that helped.

Tim

What you said doesn't even make sense


odog
Cable Centric Vendor Biased
Premium,VIP
join:2001-08-05
Atlanta, GA
kudos:5

I would think cbone is the local backbone, and ibone is national backbone and the gateway to the internet peering points. Thats just pure speculation on my part though


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