Rogers Modem/Router: Persistent DNS Errors After Outage... | terminalfaults.org

Technical Background:

DNS resolution involves translating domain names (e.g., google.ca) into IP addresses. The modem/router typically obtains DNS server addresses from the ISP (Rogers) via DHCP. Errors can arise from incorrect DNS server addresses, DNS server unavailability, or network connectivity issues. LTE Bands in the 700 MHz, 850 MHz, 1700 MHz, 1900 MHz and 2100 MHz ranges are potentially active depending on geographic area and available bandwidth. Signal-to-noise ratio (SNR) affects data transmission quality. Low SNR leads to packet loss and connection instability affecting DNS resolution. RSRP is the received signal reference power and indicates the strength of the received signal.

Symptoms:

Intermittent or persistent Domain Name System (DNS) resolution failures. Observed inability to access websites by name, requiring direct IP address entry. DNS errors occurring post Rogers network outage.

Possible Causes:

Incorrect DNS server addresses configured on the modem/router.
Rogers' DNS servers experiencing temporary outage or increased latency.
Modem/router DHCP client failing to renew DNS server addresses after the outage.
Network congestion or interference affecting DNS resolution.
Firmware glitch on the modem/router causing DNS resolution issues.
Incorrect port forwarding configurations on the router if custom DNS servers are in place.

Solution:

1

Power cycle the Rogers modem/router: Unplug the power adapter, wait 60 seconds, and plug it back in.
2

Verify DNS server settings on the modem/router: Access the router's configuration page (usually via a web browser at 192.168.0.1 or 192.168.1.1). Check the DNS server settings; ensure they are set to 'Obtain DNS server address automatically' (DHCP).
3

Manually configure alternate DNS servers: If DHCP is failing, try using public DNS servers like Google DNS (8.8.8.8 and 8.8.4.4) or Cloudflare DNS (1.1.1.1 and 1.0.0.1).
4

Clear DNS cache on connected devices: On Windows, run 'ipconfig /flushdns' in Command Prompt. On macOS, run 'sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder' in Terminal.
5

Check for modem/router firmware updates: Log into the router's configuration page and check for available firmware updates.
6

Ping a known DNS server: Use the ping command (e.g., 'ping 8.8.8.8') to verify basic connectivity to a DNS server. Traceroute to that server to check for routing issues.
7

Inspect port forwarding settings (port 53): Ensure port 53 is not inadvertently blocked or redirected if custom port forwarding is enabled.

Safety Warning:

Ensure the power outlet is not overloaded with other devices. Unplug the modem/router during electrical storms. Maintain a dry environment around the modem and router to prevent electrical hazards. Safe Handling: Always unplug the device before inspecting cables.

Prevention:

Regularly power cycle the modem/router (at least once a month). Ensure the device has adequate ventilation to prevent overheating. Monitor Rogers' network status updates for planned maintenance or outages. Keep firmware updated.

Expert Tip:

If DNS errors persist, try accessing websites using their IP addresses directly (e.g., 142.250.207.46 for google.ca). If IP addresses work but domain names don't, the problem is almost certainly DNS-related. For improved Wi-Fi stability consider using a 2.4 Ghz Wi-Fi channel with least overlap to other Wi-Fi networks.

Frequently Asked Questions

•What is the IP address of my Rogers modem/router?

Consult the Rogers documentation, or use 'ipconfig' (Windows) or 'ifconfig' (macOS/Linux) to find the gateway address. Typically, it is 192.168.0.1 or 192.168.1.1.

•How do I access the Rogers modem/router configuration page?

Open a web browser and enter the IP address of your modem/router in the address bar. You'll likely be prompted for a username and password, typically found on a sticker on the device.

•What are the default username and password for my Rogers modem/router?

Check the documentation provided by Rogers or look for a sticker on the modem/router itself. If you changed the credentials previously, use those instead. Otherwise contact Rogers support.

Rogers Modem/Router: Persistent DNS Errors After Outage Diagnosis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the IP address of my Rogers modem/router?

•How do I access the Rogers modem/router configuration page?

•What are the default username and password for my Rogers modem/router?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: