Cable length limit on the so-called "Internet" port?

Question

Is there a limit on the cable-length when connecting an Ethernet cable to the so-called "Internet" port on a WRT54G router?
I assume this is a standard 10/100 Ethernet port, since I am connecting this to the Ethernet port of my DSL modem. Since the Ethernet standard defines a maximum cable-length of 100 meters when connecting any 2 Ethernet devices, I should be able to use a cable up to this length when connecting 2 Linksys routers together.
Here is what I want to do:
DSL Modem-->Linksys Router-->Linksys Router
My first Linksys WRT54G router is connected to a DSL modem. I want to put a second WRT54G Linksys router in a different building, and connect them with a 100 meter Ethernet cable, connecting the remote end to the second router´s "Internet" port, and the other end into one of the first router´s available 10/100 ports. This will allow me to create 2 wireless signals, with 2 different DHCP scopes and 2 different SSID´s, basically allowing me to extend the range, with the 2 routers connected with a physical wire.
This works when connecting them with a short, 2 meter cable. Using a short cable I am able to associate with the second router´s SSID, get a DHCP address from that router, and then turn on RIP on both routers and have traffic route from the second router to the first one and out to the Internet successfully.
However, when I replace the short cable with a longer one, either 80 meters or 100 meters, I don´t get a link light between the routers. I do get a link light if I connect to a 10/100 port on both routers, but RIP doesn´t seem to want to exchange routes on the second router out anything other than the "Internet" port. Moving the cable back to the "Internet" port fails to produce a link light (unless I use a really short cable, which does produce a link light).
So my question is this: from a Layer-1 perspective, is the "Internet" port an Ethernet port that enforces a cable-length limit that doesn`t follow the standard 100 meter rule?
--- Christer

Answer 1

well..the internet port is definitely an ethernet port...however, it is not supposed to limit the cable length .. try a 50 m cable and check whether it works...because my friend had a similar kind of an issue and it worked fine with a 50 m ethernet cable ..