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Old 08-12-2002, 07:21 AM   #1
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Registered: Feb 2002
Distribution: RedHat 7.2
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3COM 3c509 problems


I have a Dell from 1995 that I just installed RH 7.3 on and everything appears to
be correctly configured, but I have no network connectivity. The really odd bit, I installed
this guy network boot/ ftp install. When he came back up after the install networking
wasn't operational. I tried static IP and the NIC took definition and came UP RUNNING,
but dhcpcd was the original config. Even when it's UP RUNNING, connectivity is not working.

Here's the scoop:

3COM 3c509 integrated on Dell motherboard
irq 5, mem 0220-022f 0250-025f

lsmod displays 3c509 used 1

netstat -r
destination gateway genmask flags iface * U eth0127.0.0.0 * U lo
default UG eth0

ifconfig eth0inet addr
TX packets 49
RX packets 0
Interrupt 5 base address 0x220

By all I know about networking, this NIC should be working. I disabled the firewall,
but I have received no packets whatsoever. So, dns and ping don't work as a result.
I'm totally stumped here; is there something I'm missing?


Old 08-12-2002, 09:00 AM   #2
Registered: Jan 2002
Location: Cheyenne Wyoming
Distribution: Debian/Raspbian/Mint
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You may not be getting your DNS server IP's from DHCP, Try putting them in manualy /etc/resolv.conf

ie; namserver XXX.XXX.XXX.XXX

Or try running netconfig and setting it up that way.
Old 08-12-2002, 09:57 AM   #3
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Registered: Aug 2001
Location: Dublin, Ireland
Distribution: Slackware
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Yeah like Hanzerik pointed out, if its getting an IP address from dhcp? Right? then the card's module is working, your route tree looks right. Name resolution makes sense as the culprit. Does the machine have a gateway out? Try:


and look for a route line with the UG flag set.


Old 08-12-2002, 10:52 AM   #4
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Registered: Feb 2002
Distribution: RedHat 7.2
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Here's 'netstat -r':

netstat -r
destination gateway genmask flags iface * U eth0 * U lo
default UG eth0

I do have a default route, and the NIC is configured correctly. I do have /etc/resolv.conf
configured with my DNS servers. I think the odd thing here is that this NIC worked
perfectly during the install, and failed horribly afterwards when new devices such as
the other modules were loaded. I've verified no connectivity via dhcpcd and a valid
static IP.


Module Size used by Not tainted
autofs 11940 0 (autoclean) (unused)
3c509 10624 1
ext3 64448 2
jdb 47608 2 [ext3]

'lsdev' show no IRQ conficts and no i/o port conflicts.

Does that help? I'm really lost here diagnosing a HW oddity like this...


Old 08-12-2002, 11:13 AM   #5
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Registered: Aug 2001
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Its most likely an IRQ assignment issue. Even though it may read as clean in /proc/interrupts and lsdev. Try rmmod'ing 3c509 and modprobe it with irq=x just guessing at different IRQ assignments until one works.


Old 08-15-2003, 07:33 AM   #6
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Registered: Aug 2003
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I had the exact same problem. Could not ping to other nodes on my lan (including the router), but could ping self. just using modprobe 3c509 irq=5 did the trick on my system.

Thanks Again!


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