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No Connectivity past comcast's network

New Poster

No Connectivity past comcast's network

<accidently orginaly posted this in the wrong forum>
 
No connectivity past comcast's network

Since last night, I cannot ping anything past the comcast network.

 

I have a netgear n450 CG3000Dv2. It shows connected to comcast network.

 

(truncating IP's for privacy) I can ping the Cable modem IP address 76.125.x.x. The Default gateway 76.125.x.x - The DHCP server 69.252.208.87 and BOTH comcast DNS 75.75.75.75 and 75.75.76.76

 

I cannot ping ANYTHING outside of the comcast network. Google's DNS 8.8.8.8, level3 DNS 4.2.2.2 as exaqmples.

 

I've called comcast support and opened a ticket with them, they suggest that it must be my cable modem, as they show good signal. I just don't really want to drop $100 on a new Cable modem, it doesn't really seem like it could be an issue on my end.

 

Anyone have any ideas?

Expert

Re: No Connectivity past comcast's network

Can you browse to anything ? Please post the output of a traceroute to google.com



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New Poster

Re: No Connectivity past comcast's network

Correct i cannot browse to anything. I can however resolve DNS requests from the Comcast DNS.

 

here are traceroutes directly from my cable modem  first to google.com second traceroute is to the google DNS 8.8.8.8

 

Performing traceroute to (172.217.7.238) from (76.125.x.x), 30 hops max, 92 byte packets

 

01 96.120.63.161 <1 ms 10 ms 10 ms

02 68.85.72.1 10 ms 10 ms 10 ms

03 96.108.91.54 <1 ms 10 ms 10 ms

04 96.108.91.57 20 ms 10 ms 10 ms

05 68.86.91.25 20 ms 30 ms 20 ms

06 96.110.32.181 20 ms 30 ms 20 ms

07 96.110.32.198 20 ms 20 ms 20 ms

08 * * *

09 *

Traceroute FAILED.

 

 

Performing traceroute to (8.8.8.8) from (76.125.x.x), 30 hops max, 92 byte packets

 

01 96.120.63.161 10 ms 10 ms <1 ms

02 68.85.72.113 10 ms 10 ms 10 ms

03 96.108.91.57 10 ms 20 ms 40 ms

04 68.86.91.25 20 ms 20 ms 20 ms

05 68.86.86.34 20 ms 20 ms 20 ms

06 * * *

07 *

Traceroute FAILED.

Expert

Re: No Connectivity past comcast's network

Looks like your packets are not making it past Comcast's regional routers to the backbone transit routers. I would call in to 1-800-comcast to report this if you haven't yet done so.



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New Poster

Re: No Connectivity past comcast's network

Thanks for your help, i'll try calling again. I called them this morning and they said it was on my end.  Because it was not their cable modem and they could not troubleshoot.

 

I tried to bring up these results but that didn't seem to matter. 

Expert

Re: No Connectivity past comcast's network

Ask for a tier 2 rep or a supervisor. It's very likely that a Comcast NOC official already knows about this and it's just a matter of time before it is corrected. Good luck !



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New Poster

Re: No Connectivity past comcast's network

Level1 support is impenetrable - instead of escalating me they want me to call Netgear. They don't understand, why it would need to be escalated. 

Official Employee

Re: No Connectivity past comcast's network

CraigM2, thank you for reaching out here! Are you still having this issue? I get how important it is to get this resolved as soon as possible, and I'd be happy to help. Please send me a PM with your first and last name to get started! 

To send me a Private Message, please click my name “ComcastAlly” and click “Send a message.”


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