how to determine cable modem ip

besides going to a site like http://www.all-nettools.com/pr.htm how can i obtain cable modem ip.are there any tools or commands(win2k/win98) that would find it.i looked into a program called ip2 but all it does is query site like the one above(kinda cheesy).also on the average how long will the lease be for the ip?a month or two?thanx

one more thing is there a way to release/renew modem ip(like ya do for nic)?or do u just have to wait till the isp does it?

go to command prompt then try

ipconfig
for information

ipconfig \release
releases IPs

ipconfig \renew
renews them

that should work, the other variation to try is something like winipconfig or winconfig or something similar, i suggest try googling.

hi compuetr thanx for reply but im not talkin about my nic......im talkin about cable modem ip.ipconfig /all and release renew only apply to the network adapter....not the cable modem...unless im missing something here.anyone ???????????

Why don't you just use a site like the one you listed above? That gives you your ip, why do you need another way to do it?

the ip address of the modem it self is what hes asking. Its like 192.168.0.100 or something like that

Most DOCSIS cable modems have two IP addresses:

a customer-side IP address used on the ethernet/USB socket to which the user connects;
an ISP-side IP address used on the CATV socket to which the ISP's network connects.
The customer-side IP address of a DOCSIS cable modem is normally 192.168.100.1. For 3Com Tailfins with early firmware versions it was 149.112.50.65. Firmware can be automatically updated by your cable operator down the cable, so by the time you read this, most Tailfins will have been updated to use the standard address. The 3Com CMX does not have a customer-side IP address.

The IP address 192.168.100.1 will be present even if no web diagnostics are offered on that address.

The cable modem IP address 192.168.100.1 is not in the same sub-net as the user's PC. So, when trying to send to 192.168.100.1, the user PC's IP stack will normally route the packet to the Default Gateway address at the UBR. Since no routes exist to the private address 192.168.100.1 (and there are multiple instances of this IP address on any one CATV segment), the UBR drops the packet. This would mean that in theory the PC could never talk to the cable modem. However, the Surfboard, the 3Com Tailfin, and the ntl:home 100/120 are capable of sniffing the passing traffic through the transparent bridge to intercept any packets addressed to themselves. This only works when the bridge is open, so the cable modem diagnostics cannot be read when the cable modem is booting up or failing to remain in contact with the UBR.