voip_user
join:2006-06-14
Middletown, CT | CRAN
How can i check if i am on Comcast CRAN or not? |
|
sortofageek
Premium,Mod
join:2001-08-19
Valhalla Dr
clubs:
 ·Comcast
Host:
Team Helix
Distributed Comput..
Linksys
Comcast HSI
Comcast Cable TV
| Have you read this forum FAQ, especially the thread to which it links?
»Comcast High Speed Internet FAQ »What is CRAN?
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Nerdtalker
Working Hard, Or Hardly Working?
Premium,MVM
join:2003-02-18
Tucson, AZ
clubs:
| reply to voip_user
Essentially, if you do a traceroute to somewhere (anywhere) and see a whole bunch of hops with IPs that resolve to comcast, you're on CRAN.
The idea is that the Comcast internal network has less latency than routing through the greater internet, so traffic goes through that.
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I'm testing Gmail's spam filters: Broadbandreports1@gmail.com
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Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
clubs:
 ·Comcast Digital Vo..
·Comcast
·Vonage
| A question:
How many(on average) Comcast routers are in a trace if not CRAN? Maybe 1 or 2?
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SolarPup
IT Geek-Dawg
Premium
join:2002-03-07
The Pound
clubs: | 2, maybe 3 at the most. |
|
Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
clubs: | So CRAN averages about 6 or so routers? |
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Nerdtalker
Working Hard, Or Hardly Working?
Premium,MVM
join:2003-02-18
Tucson, AZ
clubs:
| It's hard to say. I'd say that most of the time, there are less than five or six hops after CRAN ends before the destination.
I'm sure there are exceptions, but on average it does seem to result in pretty good latency.
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"Some people never see the light till it shines thru bullet holes." -Bruce Cockburn
I'm testing Gmail's spam filters: Broadbandreports1@gmail.com
Spam: 12900+ messages currently using 406 MB. |
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Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
clubs: | Do you mind posting a trace? Might be good for the OP to see CRAN. |
|
Nerdtalker
Working Hard, Or Hardly Working?
Premium,MVM
join:2003-02-18
Tucson, AZ
clubs:
1 edit | Here's a traceroute to dslreports.com:
C:\Documents and Settings\Brian Klug>tracert dslreports.com
Tracing route to dslreports.com [209.123.109.175]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms m0n0wallrouter.xxxx[192.168.xxx.xxx]
2 9 ms 21 ms 13 ms xxx.xxx.xxx.xxx
3 11 ms 9 ms 10 ms ge-1-2-sr01.sabino.az.pima.comcast.net [68.87.17
2.217]
4 12 ms 11 ms 9 ms te-9-2-ar01.pimaco.az.pima.comcast.net [68.87.17
2.17]
5 12 ms 25 ms 15 ms 12.127.141.61
6 75 ms 75 ms 77 ms tbr2-p013504.phmaz.ip.att.net [12.123.206.14]
7 71 ms 72 ms 74 ms tbr2-cl1592.dlstx.ip.att.net [12.122.10.81]
8 72 ms 71 ms 71 ms tbr1-cl6.sl9mo.ip.att.net [12.122.10.89]
9 75 ms 73 ms 73 ms tbr1-cl4.wswdc.ip.att.net [12.122.10.29]
10 75 ms 74 ms 75 ms tbr2-cl27.wswdc.ip.att.net [12.122.9.150]
11 71 ms 69 ms 70 ms tbr2-cl15.n54ny.ip.att.net [12.122.10.53]
12 72 ms 70 ms 69 ms gar1-p370.nwrnj.ip.att.net [12.123.0.157]
13 78 ms 75 ms 77 ms att-gige.esd1.nwr.nac.net [12.119.140.26]
14 74 ms 71 ms 71 ms 3.ge-3-0-0.gbr2.nwr.nac.net [209.123.11.189]
15 94 ms 73 ms 73 ms 0.so-0-3-0.gbr1.oct.nac.net [209.123.11.233]
16 72 ms 71 ms 71 ms www.dslreports.com [209.123.109.175]
Trace complete.
You can see how many comcast and att hops there are between me and dslreports, and how there are only four hops outside CRAN, and inside NAC's network.
***edit*** probably not CRAN behavior. My mistake. |
|
dadkins
Can you do Blu?
Premium,MVM
join:2003-09-26
Hercules, CA
·Comcast
| reply to Johkal
Mine:
Tracing route to www.yahoo.akadns.net [209.131.36.158]
over a maximum of 30 hops:
1 1 ms 2 ms 1 ms 192.168.0.1
2 * * * Request timed out.
3 10 ms * 10 ms GE-1-1-ur03.pinole.ca.sfba.comcast.net [68.87.19
6.249]
4 8 ms 11 ms * 10g-8-1-ur01.pinole.ca.sfba.comcast.net [68.87.1
92.97]
5 * 11 ms * 10g-9-3-ar01.sfsutro.ca.sfba.comcast.net [68.87.
192.93]
6 26 ms 11 ms 12 ms 68.87.226.130
7 14 ms 26 ms 11 ms 12.117.240.17
8 15 ms 13 ms 14 ms tbr2032701.sffca.ip.att.net [12.123.12.53]
9 23 ms 10 ms 11 ms ggr2-p3120.sffca.ip.att.net [12.123.12.22]
10 13 ms 15 ms 14 ms 192.205.33.18
11 20 ms 14 ms 13 ms 4.71.112.14
12 15 ms 15 ms 16 ms g-1-0-0-p161.msr1.sp1.yahoo.com [216.115.107.63]
13 14 ms 16 ms 14 ms te-8-1.bas-a2.sp1.yahoo.com [209.131.32.19]
14 15 ms 14 ms 15 ms f1.www.vip.sp1.yahoo.com [209.131.36.158]
Trace complete.
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Think outside the Fox... Opera |
|
Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
clubs: | Cool! 
Good examples for him!  |
|
NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
Murfreesboro, TN
 ·AT&T Southeast
·Vonage
 ·Cingular Wireless
·AT&T CallVantage
| reply to Nerdtalker
Here is a traceroute I think which shows CRAN, I don't think that the att.net hops are actually considered to be part of CRAN.
Tracing route to www.dslreports.com [209.123.109.175]
over a maximum of 30 hops:
1 <10 ms <10 ms <10 ms dcs-gw2.dcs-net [192.168.1.254]
2 * * * Request timed out.
3 13 ms * * 68.86.150.137
4 10 ms 12 ms * 68.86.148.89
5 11 ms * 9 ms 68.86.148.101
6 10 ms 11 ms 21 ms 68.86.148.73
7 13 ms 12 ms 10 ms 68.86.148.69
8 13 ms 13 ms 12 ms 68.86.148.105
9 19 ms 20 ms 17 ms 68.86.148.41
10 27 ms 42 ms 29 ms 68.86.148.9
11 27 ms 27 ms 35 ms 68.86.148.110
12 65 ms 32 ms 34 ms 12.116.236.49
13 50 ms 53 ms 48 ms tbr1011201.attga.ip.att.net [12.123.20.234]
14 47 ms 51 ms 55 ms tbr2-cl17.wswdc.ip.att.net [12.122.10.69]
15 64 ms 60 ms 61 ms tbr2-cl15.n54ny.ip.att.net [12.122.10.53]
16 49 ms 52 ms 54 ms gar1-p370.nwrnj.ip.att.net [12.123.0.157]
17 59 ms 76 ms 56 ms att-gige.esd1.nwr.nac.net [12.119.140.26]
18 49 ms 49 ms 51 ms 3.ge-3-0-0.gbr2.nwr.nac.net [209.123.11.189]
19 116 ms 135 ms 168 ms 0.so-0-3-0.gbr1.oct.nac.net [209.123.11.233]
20 58 ms 64 ms 55 ms www.dslreports.com [209.123.109.175]
Trace Complete.
--
We can never have enough of nature.
We need to witness our own limits transgressed, and some life pasturing freely where we never wander.
Test your firewall. |
|
Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
clubs: | Wow, you are 10 routers in network! |
|
voip_user
join:2006-06-14
Middletown, CT
·VoiceStick
| reply to Johkal
Here is mine ..
C:\>tracert www.broadbandreports.com
Tracing route to broadbandreports.com [209.123.109.175]
over a maximum of 30 hops:
1 3 ms 4 ms 5 ms 192.168.251.1
2 15 ms 14 ms 14 ms 73.157.12.1
3 16 ms 14 ms 15 ms 68.87.183.149
4 14 ms 14 ms 14 ms 10g-9-1-ur01.killingworth.ct.hartford.comcast.net [68.87.182.46]
5 16 ms 14 ms 14 ms 10g-9-1-ur01.clinton.ct.hartford.comcast.net [68.87.182.42]
6 23 ms 14 ms 20 ms 10g-4-2-rr01.branford.ct.hartford.comcast.net [68.87.182.38]
7 17 ms 14 ms 15 ms 10g-4-1-rr01.wallingford.ct.hartford.comcast.net [68.87.182.213]
8 17 ms 14 ms 14 ms 10g-4-1-rr01.berlin.ct.hartford.comcast.net [68.87.182.217]
9 14 ms 15 ms 19 ms 68.87.182.5
10 14 ms 14 ms 14 ms 10g-8-1-ar01.berlin.ct.hartford.comcast.net [68.87.182.90]
11 19 ms 19 ms 20 ms 12.116.169.5
12 23 ms 19 ms 29 ms tbr1032801.n54ny.ip.att.net [12.123.0.34]
13 20 ms 19 ms 19 ms gar1-p350.nwrnj.ip.att.net [12.123.0.153]
14 40 ms 19 ms 19 ms att-gige.esd1.nwr.nac.net [12.119.140.26]
15 28 ms 23 ms 19 ms 3.ge-3-0-0.gbr2.nwr.nac.net [209.123.11.189]
16 21 ms 19 ms 25 ms 0.so-0-3-0.gbr1.oct.nac.net [209.123.11.233]
17 22 ms 21 ms 19 ms www.dslreports.com [209.123.109.175]
Trace complete. |
|
Nerdtalker
Working Hard, Or Hardly Working?
Premium,MVM
join:2003-02-18
Tucson, AZ
clubs:
| reply to NetFixer
Yeah NetFixer  , that looks much more like CRAN because those IP addresses don't resolve to dns names, which is characteristic of CRAN.
To be quite honest, I'm not sure if my area is even CRAN yet, so that tracert I posted might not be exemplary.
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"Some people never see the light till it shines thru bullet holes." -Bruce Cockburn
I'm testing Gmail's spam filters: Broadbandreports1@gmail.com
Spam: 12900+ messages currently using 406 MB. |
|
K Patterson
Premium,MVM
join:2006-03-12
Columbus, OH | reply to Nerdtalker
I don't see any indication that you are on CRAN. There are only two Comcast hops, neither show discarded ICMP packets, and both have rDNS entries.
Net fixer's post shows a typical CRAN configuration.
Dadkins is also probably CRAN. |
|
NetFixer
Freedom is NOT Free
Premium
join:2004-06-24
Murfreesboro, TN
·AT&T Southeast
·Vonage
·Cingular Wireless
·AT&T CallVantage
| reply to Johkal
said by Johkal :Wow, you are 10 routers in network! That is actually a basic characteristic of CRAN.
Here is the whois info for the 68.x.x.x IP block (Comcast) and the 12.x.x.x IP block (ATT) to show why I don't think that the att.net hops can be considered part of CRAN.
OrgName: Comcast Cable Communications, Inc.
OrgID: CMCS
Address: 1800 Bishops Gate Blvd
City: Mt Laurel
StateProv: NJ
PostalCode: 08054
Country: US
NetRange: 68.80.0.0 - 68.87.255.255
CIDR: 68.80.0.0/13
NetName: JUMPSTART-2
NetHandle: NET-68-80-0-0-1
Parent: NET-68-0-0-0-0
NetType: Direct Allocation
NameServer: DNS.INFLOW.PA.BO.COMCAST.NET
NameServer: DNS.CMC.CO.DENVER.COMCAST.NET
Comment: ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE
RegDate: 2002-01-28
Updated: 2006-01-26
RTechHandle: IC161-ARIN
RTechName: Comcast Cable Communications Inc
RTechPhone: +1-856-317-7200
RTechEmail: CNIPEO-Ip-registration@cable.comcast.com
OrgAbuseHandle: NAPO-ARIN
OrgAbuseName: Network Abuse and Policy Observance
OrgAbusePhone: +1-856-317-7272
OrgAbuseEmail: abuse@comcast.net
OrgTechHandle: IC161-ARIN
OrgTechName: Comcast Cable Communications Inc
OrgTechPhone: +1-856-317-7200
OrgTechEmail: CNIPEO-Ip-registration@cable.comcast.com
CustName: AT&T Worldnet Services
Address: 200 South Laurel Ave.
City: Middletown
StateProv: NJ
PostalCode: 07748
Country: US
RegDate: 2003-11-26
Updated: 2003-11-26
NetRange: 12.122.0.0 - 12.123.255.255
CIDR: 12.122.0.0/15
NetName: ATTSVI-12-122-0-0
NetHandle: NET-12-122-0-0-1
Parent: NET-12-0-0-0-1
NetType: Reassigned
Comment: Contact AT&T Abuse ( abuse@att.net ) for policy abuse issues.
RegDate: 2003-11-26
Updated: 2003-11-26
RTechHandle: DK71-ARIN
RTechName: Kostick, Deirdre
RTechPhone: +1-919-319-8249
RTechEmail: help@ip.att.net
OrgAbuseHandle: ATTAB-ARIN
OrgAbuseName: ATT Abuse
OrgAbusePhone: +1-919-319-8130
OrgAbuseEmail: abuse@att.net
OrgTechHandle: ICC-ARIN
OrgTechName: IP Customer Care
OrgTechPhone: +1-888-613-6330
OrgTechEmail: qhoang@att.com
OrgTechHandle: IPSWI-ARIN
OrgTechName: IP SWIP
OrgTechPhone: +1-888-613-6330
OrgTechEmail: help@ip.att.net
--
We can never have enough of nature.
We need to witness our own limits transgressed, and some life pasturing freely where we never wander.
Test your firewall. |
|
dadkins
Can you do Blu?
Premium,MVM
join:2003-09-26
Hercules, CA | reply to voip_user
{Don't quote me} I think blank or Comcast hops with 10g are considered CRAN...
10g-8-1-ur01...
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Think outside the Fox... Opera |
|
K Patterson
Premium,MVM
join:2006-03-12
Columbus, OH | It would seem likely that 10g means 10 gigabit, which is consistent with what we know of CRAN.
The ATT hops are not CRAN. They are bandwidth purchased from ATT.net. |
|
FlsRend
Premium
join:2004-01-31
Philadelphia, PA
·Comcast
1 edit | reply to voip_user
Mine:
C:\>tracert dslreports.com
Tracing route to dslreports.com [209.123.109.175]
over a maximum of 30 hops:
1 1 ms 1 ms 1 ms c-68-38-108-63.hsd1.pa.comcast.net [68.38.108.63]
2 * * * Request timed out.
3 52 ms 60 ms 21 ms ge-2-1-ur02.bensalem.pa.panjde.comcast.net [68.86.156.93]
4 45 ms 20 ms 35 ms po-10-ur01.torresdale.pa.panjde.comcast.net [68.86.208.81]
5 9 ms 46 ms 16 ms po-10-ur02.torresdale.pa.panjde.comcast.net [68.86.208.77]
6 26 ms 22 ms 11 ms po-10-ur01.kensington.pa.panjde.comcast.net [68.86.208.73]
7 13 ms 33 ms 70 ms po-10-ur01.wayneave.pa.panjde.comcast.net [68.86.208.69]
8 25 ms 17 ms 9 ms po-10-ur01.fairmountave.pa.panjde.comcast.net [68.86.208.65]
9 13 ms 19 ms 9 ms po-10-ur01.christianst.pa.panjde.comcast.net [68.86.208.61]
10 63 ms 23 ms 68 ms po-10-ur01.columbusblvd.pa.panjde.comcast.net [68.86.208.57]
11 35 ms 21 ms 9 ms po-10-ur01.greenwayave.pa.panjde.comcast.net [68.86.208.53]
12 23 ms 27 ms 50 ms po-20-ar01.wallingford.pa.panjde.comcast.net [68.86.208.49]
13 29 ms 14 ms 51 ms po90-ar01.401nbroadst.pa.panjde.comcast.net [68.86.208.29]
14 17 ms 29 ms 39 ms ge-3-0-cr01.torresdale.pa.core.comcast.net [68.86.211.14]
15 12 ms 24 ms 83 ms 12.118.114.5
16 18 ms 19 ms 32 ms tbr1-p012301.phlpa.ip.att.net [12.123.137.210]
17 17 ms 18 ms 17 ms tbr1-cl8.n54ny.ip.att.net [12.122.2.17]
18 41 ms 21 ms 24 ms gar1-p350.nwrnj.ip.att.net [12.123.0.153]
19 15 ms 18 ms 112 ms att-gige.esd1.nwr.nac.net [12.119.140.26]
20 15 ms 18 ms 16 ms 3.ge-3-0-0.gbr2.nwr.nac.net [209.123.11.189]
21 31 ms 20 ms 16 ms 0.so-0-3-0.gbr1.oct.nac.net [209.123.11.233]
22 90 ms 18 ms 65 ms www.dslreports.com [209.123.109.175]
Trace complete.
C:\>
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