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Comments about specific cards

• With IBM CCAE and Socket EA cards, the transceiver type (10base2, 10baseT, AUI) needs to be set

when the network device is configured. Make sure that the transceiver type reported in the system log

matches your connection.

• The Farallon EtherWave is actually based on the 3Com 3c589, with a special transceiver. Though the

EtherWave uses 10baseT−style connections, its transceiver requires that the 3c589 be configured in

10base2 mode.

• If you have trouble with an IBM CCAE, NE4100, Thomas Conrad, or Kingston adapter, try

increasing the memory access time with the mem_speed=# option to the pcnet_cs module. An

example of how to do this is given in the standard config.opts file. Try speeds of up to 1000 (in

nanoseconds).

• For the New Media Ethernet adapter, on some systems, it may be necessary to increase the IO port

access time with the io_speed=# option when the pcmcia_core module is loaded. Edit

CORE_OPTS in the startup script to set this option.

• The multicast support in the New Media Ethernet driver is incomplete. The latest driver will function

with multicast kernels, but will ignore multicast packets. Promiscuous mode should work properly.

• The driver used by the IBM and 3Com token ring adapters seems to behave very badly if the cards

are not connected to a ring when they get initialized. Always connect these cards to the net before

they are powered up. If ifconfig reports the hardware address as all 0's, this is likely to be due to

a memory window configuration problem.

• Some Linksys, D−Link, and IC−Card 10baseT/10base2 cards have a unique way of selecting the

transceiver type that isn't handled by the Linux drivers. One workaround is to boot DOS and use the

vendor−supplied utility to select the transceiver, then warm boot Linux. Alternatively, a Linux utility

to perform this function is available at ftp://sourceforge.org/pcmcia/extras/dlport.c.

• For WaveLAN wireless network adapters, Jean Tourrilhes ([email protected]) has put together a

wireless HOWTO at http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/.

Diagnosing problems with network adapters

• Is your card recognized as an ethernet card? Check the system log and make sure that

cardmgr identifies the card correctly and starts up one of the network drivers. If it doesn't, your

card might still be usable if it is compatible with a supported card. This will be most easily done if

the card claims to be ``NE2000 compatible''.

• Is the card configured properly? If you are using a supported card, and it was recognized by

cardmgr, but still doesn't work, there might be an interrupt or port conflict with another device.

Find out what resources the card is using (from the system log), and try excluding these in

/etc/pcmcia/config.opts to force the card to use something different.

• If your card seems to be configured properly, but sometimes locks up, particularly under high load,

you may need to try changing your socket driver timing parameters. See the Startup options section

for more information.

• If you get ``network unreachable'' messages when you try to access the network, then the routing

information specified in /etc/pcmcia/network.opts is incorrect. This message is an

absolutely foolproof indication of a routing error. On the other hand, mis−configured cards will

usually fail silently.

Linux PCMCIA HOWTO

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