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reply to plk

Re: Hey Suddenlink Cisco modem iss fixed?

So the issue you were having with the DPC3825 was a DNS resolution problem? Did you ever try telnetting to an IP address over port 53 (netcat for UDP) before switching back to the Arris modem?

united state

1 edit
working on that right now. Have 2 modems running to figure this issue out. Didnt know how to telnet and neither did suddenlink support. Going to try it now.

No luck on the telnet tried suddenlink google and dslr host.com and a few others.
I have a IP address 3 dns address and everything looks line on my end and suddenlinks. But still says unable to connect to dsn servers contact your ISP.


Who's 3 DNS IP's are assigned in your router? You don't by chance have MAC spoofing enabled do you (on the DPC3825)? Also, have you taken a look at the modems error logs for any outstanding oddities? Sorry for all the questions I just find this behavior rather bizarre.

I've also read somewhere that having "Block IP Flood Detection" enabled in the DPC3825's configuration can cause random issues as well.

united state
I have all the firewall turned off.
Modem is still connected to internet but not to a computer. You can try and see if you can ping it etc.

IP Address:
Subnet Mask:
Default Gateway:
DNS 1:
DNS 2:
DNS 3:

Model: Cisco DPC3825
Vendor: Cisco
Hardware Revision: 1.0
Serial Number: 224853131
MAC Address:: 00:22:ce: XXXXXXXXX
Bootloader Revision: 2.3.0_R3
Current Software Revision: dpc3825-v302r12901-091215a
Firmware Name: dpc3825-v302r12901-091215a.bin
Firmware Build Time: Dec 15 2009 17:06:57
Cable Modem Status: Operational

Power Level Signal to Noise Ratio
Channel 1: 9.9 dBmv 40.6 dBmv
Channel 2: 10.3 dBmv 40.9 dBmv
Channel 3: 10.2 dBmv 39.8 dBmv
Channel 4: 10.5 dBmv 40.5 dBmv
Channel 5: 0.0 dBmv 0.0 dBmv
Channel 6: 0.0 dBmv 0.0 dBmv
Channel 7: 0.0 dBmv 0.0 dBmv
Channel 8: 0.0 dBmv 0.0 dBmv

Power Level
Channel 1: 35.2 dBmv
Channel 2: 0.0 dBmv
Channel 3: 0.0 dBmv
Channel 4: 0.0 dBmv


Haughton, LA
Your incoming signal is amped up just a bit high. Throw a splitter on that line to drop the down stream power level. Doc 3 range i think is -8 to +8 db downstream. See if that helps anything


reply to plk
DNS 3:

Should your default gateway be external to your LAN? Just wondering.