| reply to dorkino
Re: [Speed] Comcast throttling streaming? said by dorkino:According to whois.arin.net, those belong to Comcast.
I don't have access to my tools, right now, but no single entity owns 24.0.0.0/8 (the Class A). It is divided between at least three different ISPs, and not in classful segments. ARIN assigns IP addresses using CIDR ("Classless Inter Domain Routing"). Without a specific 24.x.x.x IP address, I can't say what Comcast actually has; probably a /11, or two in that range. Other companies assigned IP addresses in that "Class A" include Charter and Mediacom (MCHSI).
Classful IP address assignment is passe, and CIDR is used now.
I'm just wondering why I'd get such drastically different gateways.
My guess is something between your modem and the gateway. I have no clue what.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum |
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dorkinoPremium
join:2004-02-22
Atlanta, GA | The person on the phone is telling me my modem IP is a 96.176.88.x IP, which is some IP in Mt Laurel, NJ. I'm trying to convince her that it's NOT that IP, that it's 24.x.x.x. IDK what they are doing.
Also, the 24.x.x.x gateway is located in Marietta, GA, which is where I used to live a few years ago. Now I live in Cumming, GA, so shouldn't I be pulling an IP from a gateway located in CUmming? I do when I hook a computer up, but my router pulls the 24.x.x.x IP. The girl on the phone said she can't assign a new IP, and that it should always change anyway. I tried to explain to her the concept of DHCP leases... ugh |
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 tshirtPremium,MVM
join:2004-07-11
Snohomish, WA
kudos:3
 ·Comcast
| reply to dorkino
The Mt Laurel, NJ address is where all Comcast IP's are registered to, not the actual location where it is currently in use.
regardless of where some online DB says your (or any) IP is located, ComCast does know where you live and the DHCP server is assigning an IP according to the rules programmed into it. |
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dorkinoPremium
join:2004-02-22
Atlanta, GA | Makes sense. But why do they see a 96. IP when I see a 24. IP? |
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tshirtPremium,MVM
join:2004-07-11
Snohomish, WA
kudos:3 Reviews:
·Comcast
| some modems have multiple IP's one for HSI, one for Voice,
OR there could be an error in what the CSR is seeing either from a delay in updating the DB, or an account error.
Next time you call you need to verify with them that they are seeing the correct MAC and serial #'s online and on the account that match the actual modem you are using.
Occasionally they need to remove and re-add your modem to fix the problem, (to fix electronic "typo's") . |
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dorkinoPremium
join:2004-02-22
Atlanta, GA | I'll call back and check with them. My modem is a SB6120, so no voice capabilities, although I do have voice on my account because it was part of some bundle.
This is interesting - I changed the MAC of the router to clone the PC's MAC that pulled the 174.x.x.x address. Once it pulled that IP, the problem became significantly WORSE. Flash pictures of things on NewEgg would take 30 seconds to appear. Youtube would also take about that long for the video to even appear/initialize. So I changed it back to the 24.x.x.x IP and right now everything is working very well. Streaming services are appearing immediately. It will get worse over time though.
I went ahead and ordered a SB6121 just to rule out the possibility that my modem is going bad. Maybe either through a hardware swap or re-provisioning the problem will be fixed. Maybe. |
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 EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9 | reply to dorkino
Perhaps this is the "internal/managerial" hidden IP for the modem and not the WAN (public) IP assigned to your connection ? |
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EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9 | reply to Nkonyay
said by Nkonyay : In theory it should not matter which block member is assigned.
In "theory" perhaps, but different public IP's can result in different routing paths being traversed (especially in the return path) due to BGP and therefore different levels of performance (better or worse). |
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tshirtPremium,MVM
join:2004-07-11
Snohomish, WA
kudos:3 Reviews:
·Comcast
| reply to EG
said by EG:Perhaps this is the "internal/managerial" hidden IP for the modem and not the WAN (public) IP assigned to your connection ?
That or confusion over which modem they are looking at. (the OP has an eMTA too.) |
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tshirtPremium,MVM
join:2004-07-11
Snohomish, WA
kudos:3 Reviews:
·Comcast
| reply to dorkino
said by dorkino:This is interesting - I changed the MAC of the router to clone the PC's MAC that pulled the 174.x.x.x address. Once it pulled that IP, the problem became significantly WORSE. Flash pictures of things on NewEgg would take 30 seconds to appear. Youtube would also take about that long for the video to even appear/initialize. So I changed it back to the 24.x.x.x IP and right now everything is working very well. Streaming services are appearing immediately. It will get worse over time though.
have you tried changing the computer's/NIC's to get it to the 24.x.x.x range?
Getting worse over time (not just time of day) makes me think failing hardware or a buffer overload type problem. so eliminating the router as a problem when on the good IP might give a better idea what's happening.
renting a Modem from CC for a month, seems quicker than waiting for a modem to ship. |
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| reply to dorkino
The 96 IP address is assigned to the modem. The 24 IP is computer IP. |
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EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9 | said by Floppy:The 96 IP address is assigned to the modem. The 24 IP is computer IP.
How can you be certain please ? |
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| When a rep polls your modem the tool they use shows both the modem and CPE IP along with the RF levels. When you do an IPconfig you will always see the CPE IP. It doesn't matter what type of device is attached to the modem. The modem IP is an internal IP that's assigned from the CMTS and is never seen by the customer. |
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EGThe wings of lovePremium
join:2006-11-18
Union, NJ
kudos:9 | Yes, I know. So.. You must be a rep ? |
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dorkinoPremium
join:2004-02-22
Atlanta, GA | reply to Floppy
So then I wonder why the rep only saw the one "96" address and didn't see a "24" address, if supposedly she can see both the modem and the CPE IP. |
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dorkinoPremium
join:2004-02-22
Atlanta, GA
1 edit | reply to tshirt
Sorry. By "getting worse over time", I meant that despite the current good performance, it will eventually degrade. It may improve again after that, but the point was the problem is certainly not yet fixed.
I can use either the 24.x.x.x IP or the 174.x.x.x IP on the router, depending on whether or not I clone the PC's MAC that pulled the 174 IP. If i use the router's original MAC, it pulls a 24 IP. Problems exist in either scenario, though, but mysteriously the 174 IP seemed to exhibit worse problems than the 24 IP.
I'm still confused as to why I can pull such drastically different IPs. It makes me feel as though my modem is being assigned a wrong IP for my area, or perhaps the 174 IP, since it was pulled by a new, previously unknown device MAC ID, is some sort of temporary allocation. I did notice the DHCP lease time on the 174 IP was only 30 minutes as compared to the 24 IP, which is almost 4 days.
Edit: New SB6121 modem is in. Same problem: »/pingtest/9537···/2874234 |
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