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FastEthernet FAQ

I installed your E100 card in my Indigo2 but the machine doesn't see the card;

Usually this is caused by not having the E100 board firmly in the EISA slot. When you reboot, one of the very first lines you will see is Phobos Corporation Copyright 1996... If you do not see this line the Phobos 100BaseT card was not installed on the system and you will need to check your installation to be sure it was correct. Not having the E100 card properly seated in the EISA slot is the largest problem people have in installing the their card! Make sure that no gold pins on the bottom of the card are showing after you have inserted the card into the EISA slot. This may take an extra push on the card to firmly seat the card into the EISA slot.


I installed your 100BaseT card in my machine and set the 100BaseT nterface to be the default or primary interface. Now the computer can't communicate with the network.
What could cause this?

Check your network configuration and make sure you set the primaryinterface correctly. If you did not set the primary interface correctly you may be unable to see the network. Also you must use Category 5 cable for a 100BaseT network, Category 3 will not work for 100BaseT. Use the "netstat -i " command as described in the Phobos User Guide manual to check the interface. If problems persist have your Network Administrator check to make sure you have set up the network components correctly. You can have your Network Administrator use a crossover cable between two workstations to test the Phobos 100BaseT interface.


I installed the Phobos G100 adapter in my Challenge S in slot 1 and it doesn't work. Why?

In the Challenge S you MUST install the G100 adapter in slot 0, the slot nearest to the power supply. The G100 card will not work in slot 1.


The new 100BaseT card installed fine but when I rebooted the machine all my NFS mounts
didn't work; what happened?

You have an old version of the Phobos network card driver. You need to get the latest version of the software driver from Phobos' ftp site. Ftp to ftp.Phobos.com/drivers and download the latest driver for your Phobos networking card. You will need to download the driver corresponding to your 100BaseT adapter.


The installation of the 100BaseT card on my machine went fine but when I changed the
primary interface to be the 100BaseT interface it doesn't work anymore,
how did this happen?

First check to verify the new network interface is installed using the "ifconfig" command as described in the manual. If so then check with your system administrator to insure you have the proper hardware and networking protocols in place. Also check the release notes on the SGI machines with the "relnotes" command, i.e.: "relnotes Phobos_sfe" for the Phobos G100 on the SGI Indy or Challenge S machines. Refer to the man pages on your SGI machine for help with "relnotes". Also check your network configuration to make sure that all the proper files have the proper information. Also remember that two different interfaces cannot have the same IP address!


The E100 card is installed and runs faster than my old 10BaseT adapter but it doesn't seem
as fast as some of the other 100BaseT adapters; why would this happen?

Several factors affect the performance of the network adapters. The CPU, disk I/O, the graphics card(s) and network all play a part in determining network throughput. A slower CPU will naturally result in slower network performance. The actual E100 adapter transfer speeds are very CPU dependent. Likewise, disk I/O can be a true bottleneck for workstations at 100BaseT speeds. Check your disk access times and throughput. NFS is not known for its outstanding performance. Also the graphics card can have a significant impact on performance. In the Indgo2 machines the XZ and EXTREME graphics cards degrade the performance of the E100 adapter. This is due to the graphics cards physically slowing the EISA bus and thus slowing the transfer rates on the E100 card.


I have a G100 card and it installed correctly but the performance takes a nose dive
when I use NFS 3 to mount my disks. Can this be fixed?

Yes! You need to obtain the latest version of the adapter driver from our ftp site, ftp://ftp.phobos.com/drivers/SGI/phobos_sfe-112.tar. Follow the instructions in the original User Guide manual when you install the new driver.


My G100 adapter installed correctly and I don't have any trouble seeing
the network but NFS 2 doesn't work at all! What is the problem?

You have an older version of the G100 driver. You need to obtain the latest driver at ftp://ftp.phobos.com/drivers/SGI/phobos_sfe-112.tar.


After installing my new Phobos E100 adapter, my system crashes
unexpectedly. Can you fix this?

You can fix this by obtaining the latest driver at ftp://ftp.phobos.com/drivers/SGI/phobos_fe-222.tar.


After installing the E100 card my networking actually got slower!
How do I fix this?

This was a problem in machines having over 256 Megabytes of RAM. Obtain the latest driver at ftp://ftp.phobos.com/drivers/SGI/phobos_fe-222.tar to fix this problem.


After installing the Phobos 100BaseT adapter I tried to use Net Visualizer
with the 100BaseTinterface but it did not work. How can I get the Net Visualizer
to work with the Phobos adapter?

To have Net Visualizer work with the Phobos 100BaseT adapter you must change the name of the interface to "et0". You do this by editing the "/var/sysgen/master.d/if_fe" file if you have a Phobos E100 adapter, or the "/var/sysgen/master.d/if_sfe" file if you have the Phobos G100 adapter. You will need to edit the file commenting out the "char *Phobos_name ="fe";" and uncommenting the "char *Phobos_name = "et";" line. This is "C" programming code so make sure you know the "C" programming language when doing this!!


I just installed my Phobos H100 adapter in my HP computer and the installation
seemed to go fine. I have a link light on my switch but my computer doesn't
find the network interface. What is the problem?

Try reseating the H100 card in the EISA slot. The H100 adapter must be fully inserted into the slot for the adapter to work properly. Even if you think you have the card securely seated into the EISA slot, check again. You should have no gold on the connecting pins showing above the EISA slot.


When I try to install the driver for my H100 card I'm getting a bunch of errors about
"!TCMD97B" files not found. Where are those files?

These files do not exist! The system has not recognized the H100 board and mistaken it for another device corresponding to the alternative number. You need to reseat the H100 board making sure it is firmly seated in the EISA bus. Run "eisa_config" to check the listing under "CFG File" for the H100 slot. The corresponding slot should have a "!TCM5970" associated with the "CFG File" column.


I am using a software package that uses DLPI and it does not configure
with my new Phobos 100BaseT adapter. Can I get this to work?

Yes, the Phobos adapter drivers do have DLPI capability. You do need to edit the "/var/sysgen/master.d/snif" file to include the Phobos 100BaseT interface, either fe or sfe. You will need to add The line: "fe", / *Minor number 3 - Fast Ethernet */ after the "xpio", /*Minor number 2 - fddi ring */ line. You will then need to run the command "mknod c 117 3" to make the proper entry in the "/dev" directory. You will also need to edit the "/etc/config/snetd.options" file. Please read the man page for "snif", "dlpi", "snetd" and "snetd.options" for more information on the necessary steps. After making the appropriate changes to the networking files do not forget to do an "autoconfig -vf" to rebuild the kernel!


After installing my Phobos G100 card I am seeing a lot of messages in the syslog
of the form:unix: sfe_intr: dec->rdesc_next->es set What could be the problem?

This is a error message indicating a bad packet transfer. This can occur when there is a mixed duplex setting between the G100 adapter and the switch or hub connection. Check your duplex settings with the "sfe_control" command on your SGI machine and follow the manufacturer's instructions to check the duplex setting on your switch. Make sure they are both set to be the same, either full duplex or half duplex.


I just added a video capture program to my Indy and the G100 card just stopped working!
What's the problem?

You have an earlier G100 card that contained a hardware bug. You will need to exchange the old card for a new card that fixes this bug. You can get a new card by contacting your original dealer for a new card explaining the problem. If there is any problem with exchanging the card you can contact ALSOS via email at "support@alsos.com," or call us directly at +49-89-6083658.


How would we combine Fast Ethernet and Standard Ethernet?

In order to combine Fast Ethernet 100BaseT and Standard 10BaseT, you will need two cards in one machine, one with each type of ethernet.


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