Disconnects From The Internet; Slow Web Browsing - SMC Networks D3CM1604 Administrator's Manual

Disconnects from the Internet

If the cable modem has been connected to the Internet for an extended period and holds an
IP address (DHCP lease) for a longer period of time than your ISP allows, it is not
uncommon for the cable modem to disconnect from the Internet. This is normal and does not
indicate any issue with the cable modem.
1. Press the cable modem reset switch.
2. Connect a computer to one of the cable modem's LAN ports.
3. Restart your computer.
4. Reset the cable modem to its factory default settings using either the Reset button (see
"Using the Reset Button" on page 16) or the Restore Factory Defaults setting on the
Security page (see "Configuring Security Settings" on page 41).
Note: This step removes all overrides made to the cable modem's default settings and
returns the cable modem to its original factory default settings.
In certain network scenarios, it may be helpful to turn off all the equipment on your network,
and then turn the equipment all back on. Leaving some devices unplugged for up to five
minutes can also help.
If the disconnections are limited to wired clients only
Check your NIC settings and all cable routing, connections, and power supplies.
If the disconnections are limited to cable modem clients only
Focus on factors that affect cable modem clients, such as:
Network selection and security

Hardware access control

Client TCP/IP settings

Signal strength

Sources of interference


Slow Web Browsing

If you experience slow Web browsing with the cable modem:
1. Check for possible intrusions by spyware and viruses.
2. Clear browser settings and cache (refer to the documentation for your Web browser).
3. Stop other programs running in the background that are consuming bandwidth.
4. A specific site may be suffering from server issues. Try another site.
Troubleshooting Procedures
D3CM1604 DOCSIS 3.0 Cable Modem Administrator Manual
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