EtherFast Cable/DSLRouters
56
Instant Broadband Series
55
Frequently Asked Questions
How many IP addresses can the Cable/DSLRouter support? The Router supports
a maximum of 253 IP addresses.
Is IPSec Pass-Thru supported by the EtherFast Cable/DSL Router?Yes, it is a built-
in feature that the Router automatically enables.
Where is the Cable/DSLRouter installed on the network? In a typical environ-
ment, the Router is installed between the Cable/DSL Modem and the LAN.
Plug the Cable/DSLRouter into the cable or DSL modem's Ethernet port.
Does the Cable/DSLRouter support IPX or AppleTalk? No. TCP/IP is the only pro-
tocol standard for the Internet and has become the global standard for com-
munications. IPX, a NetWare communications protocol used only to route
messages from one node to another, and AppleTalk, a communications pro-
tocol used on Apple and Macintosh networks, can be used from LAN to LAN
connections, but those protocols cannot connect from WAN to LAN.
Does the WANconnection of the Cable/DSL Router support 100Mbps Ether net?
Since broadband Internet connections like cable and DSL do not exceed
10Mbps, the Cable/DSLRouter’s current hardware design only supports
10Mbps Ethernet on its WAN port. It does support 100Mbps through the
built-in auto-sensing Fast Ethernet 10/100 Switch on the LAN side of the
Router.
What is Network Address Translation (NAT) and what is it used for?Network
Address Translation (NAT) translates multiple IP addresses on the private
LAN to one public address that is sent out to the Internet. This adds a level of
network security since the addresses of PCs connected to the private LAN is
never transmitted over the Internet. Furthermore, NAT allows the Cable/DSL
Router to be used with low-cost Internet accounts, such as DSL or cable
modems, where only one TCP/IP address is provided by the ISP. The user may
have 253 private addresses behind this single address provided by the ISP.
Does the Cable/DSLRouter support any operating system other than Windows 95,
Windows 98,Windows 2000, or Windows NT? Yes, but Linksys does not pro vide
technical support for setup, configuration or troubleshooting of any non-
Windows operating systems at this time.
• Same as above, check the same setup values in the Status Monitor page
of the Cable/DSL Router.
4.When I enter a URL or IP address, I get a “Request timed out” error.
• Check to see if other PCs give you the same error message. If they do,
make sure that your workstations’ IP settings are correct: IP address,
Subnet Mask, Default Gateway and DNS Server data.
• If the PCs are configured correctly but still not working, check the
Cable/DSL Router. Make sure that it is connected and powered on.
Connect to the Router and check its settings. If you cannot connect to it,
check the LAN and power connections.
• If the Cable/DSL Router is configured correctly, check your Internet con-
nection. (DSL/cable modem, etc.) to see that it is working correctly.
5.I can’t obtain an IP address from my cable or DSL modem.
• Make sure that all of your cabling is properly connected and that all of
the Router’s WAN and LANLEDs are lighting up.
• Power down your cable or DSLmodem for a few seconds. Turn it back
on. After the modem goes through its self-test, check to see if you now
have an IPaddress.
• Make sure that your cable or DSLmodem is DHCP-capable.
• You may have to enter the Host or Domain name in the Setup page of the
Router’s web-based utility. Go to page 34 for more information.
• Your ISPmay require MAC Addresses. Check with your ISP. This address
can be obtained in the Status screen of the Router’s Web-based Utility.
6. I can’t access my email or the Internet.
• Some ISPs,especially cable providers, configure their networks so that
you don’t have to enter a full Internet address into your web browser or
e-mail application to reach your home page or receive your e-mail.
• If your Internet home page address is something very simple, such as
“www”, instead of “www.linksys.com”, or your e-mail server’s address
is something like “e-mail” or “pop3”, instead of “pop.mail.linksys.com,”
you won’t be able to properly configure your Cable/DSLRouter until
you determine the actual Internet addresses of your Web and e-mail
connections.
• You must obtain this information before connecting the Router to your
network. To do so, you can ask your ISP, or turn to page 59to learn
how to find this data yourself by “pinging” your Router for an IP
address.