ISA NIC cards are not auotmatically detected, you have manually configure them. Easiest way for to configure it is to login as the root user and run the Network Configuration Utility. It is listed in the menu under System.I just installed RedHat 7.2 from downloaded .iso images. Overall, the system is working, however my NIC was not detected (an ISA NE2000 compatible).
On the hardware tab, click add. Select the adapter type: ethernet. Then select "NE1000, NE2000, and compatible", select the Device "eth0". For an ISA card you will have to also fill in the IRQ and IO settings. The rest of the setting are not needed. If you don't know what to use for those setting, if you are dual booting, you can copy this information from the Windows device manager.
Just for reference you can boot the installer with: linux text isa
This will prompt you do manually configure you isa cards during the install. Unfortunately you have to use the text mode install.
This is a bug in RH 7.2, to work around it, as the root user, at a command prompt type: /sbin/depmod -aeI thought I'd try to redo the kernel to ensure I had all the proper device support, but the CD-ROM drive (which was used to install the system) keeps giving me 'Not a valid block device' when I try to mount a disk. So I can't load the source. Also, when I try to mount a floppy, it tells me the kernel is not configured to recognize the msdos filesystem type. ???
You need too update your system with all the lastest errata for RH 7.2 to fix this problem. Well, you actually don't need all the errata to fix "this" problem but you should install all the updates.
The kernel does have built-in support for the msdos filesystem, this may be related to the cdrom problem. I have not seen any reports of it. Update your system first and see if it cures the problem. If not we can look into it.
First time using Linux or just Red Hat?