Dear slugs

When I installed my linux Redhat 8.0 distribution I included one network card - A realtek 8139. I used
this to connect to my cable modem and the net.


I then tried to add another identical network card so I can connect it to my LAN. Unforunately the addition of
this card into the system is seemingly not permissable. If I ever try to activate the new card I lose my internet
connection.


I have tried removing both network cards and letting kudzu redetect them. I then reset all the parameters.
The system does not allow me to have any network cards active for my internet to work


I have

eth0 inactive
eth1 inactive
ppp0 active  (connecting through eth0)


When I activate eth1 to connect to my LAN - my ppp connection breaks. It says it is fine in the network
configuration - but of course it isn't.



On an identical machine I have installed Redhat 8.0 with another two Realteks at installation time. I don't
have any of these problems. Is it not yet possible to add another network card to linux after the system has
been installed? Or does linux have trouble with two network cards of the same time?



Paul Davies








Hi Paul,
given the cards are the same it may also be that the new card has become eth0 and the old card has changed from eth0 to eth1. I've seen this before in some of the system I have here that have 4 eth cards of the same type.


The new card may appear in the PCI space before the original so Linux see's it as eth0.

With just the original card in place boot the machine and note the MAC address reported for eth0 by ifconfig. Power down, add the second card and check eth0's MAC. If its changed then the above is whats happened.

If it has all you need to do is swap the cables around (at least until you add the 3rd card).

PCI's plug and play can be a two edged sword.

Cheers
-Rod


-- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug

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