Results 1 to 7 of 7

Thread: nic receives but doesn't transmit

  1. #1

    nic receives but doesn't transmit

    I have an intel pro 1000 mt nic installed using Red Hat 2.6.9-42.0.3.EL. When pinging from another machine , I can see that it receives the packets but it is not transmitting. This is on a private network. here is the routing table of the machine that cannot transmit. Built and loaded the module with the default settings...

    192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
    192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
    169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
    0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 eth1

    where eth0 is the interface...

    output from ifconfig
    eth0 Link encap:Ethernet HWaddr 00:07:E9:0F:70:FF
    inet addr:192.168.2.100 Bcast:192.168.2.255 Mask:255.255.255.0
    inet6 addr: fe80::207:e9ff:fe0f:70ff/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:69 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:100
    RX bytes:6762 (6.6 KiB) TX bytes:0 (0.0 b)
    Base address:0xa800 Memory:df000000-df020000

    Any ideas?

    thanks

  2. #2
    Administrator Advisor peter's Avatar
    Join Date
    Apr 2004
    Posts
    882
    Do you have iptables running? That could be preventing the replies.

    What does /var/log/messages say when you attempt the pings?

  3. #3
    The issue appeared to be the pci slot it was in, which I'm assuming it was the irq preventing it to work correctly. Put it in another slot and it now transmits, BUT .... I can't get it to communicate with the system on the other end at 1000 Mb/s ... software says both are at 1000 Mb/s but the light on one of them is green while the other is yellow meaning 100 Mb/s and 1000 Mb/s. both are attached to a non managed linksys gigabit switch.... I'm stumped... I've tried forcing it to 1000 Mb/s which does change the lights to both yellow but then the software states one is at 100 Mb/s and the other is at 1000 Mb/s....

  4. #4
    Moderator
    Advisor
    redhead's Avatar
    Join Date
    Jun 2001
    Location
    Copenhagen, Denmark
    Posts
    811
    Have you tried forcing it with ethtool or mii-tool ?
    Perhaps your ether cable isn't truely a cat6...
    Don't worry Ma'am. We're university students, - We know what We're doing.
    'Ruiat coelum, fiat voluntas tua.'
    Datalogi - en livsstil; Intet liv, ingen stil.

  5. #5

    May be Packet filter is running

    I suggest you try shutting down the packet filter. the packets are being received but dropped on the interface.

    # pfctl -d

    and see the outcome.

  6. #6

    Similar Problem

    We had a similar problem on a secondary network interface. The issue turned out to be a bridged module built into the kernel. You can see if a bridge is enabled by using lsmod. If so, use modeprobe -vr bridge and then reboot.

  7. #7
    Junior Member
    Join Date
    Sep 2006
    Posts
    70
    Quote Originally Posted by JimPerlGuy View Post
    We had a similar problem on a secondary network interface. The issue turned out to be a bridged module built into the kernel. You can see if a bridge is enabled by using lsmod. If so, use modeprobe -vr bridge and then reboot.

    it is a firewall issue. try following as root.

    # iptables -F

    and now try to send and receive. I am sure it will work

Similar Threads

  1. I Have An Acl That Doesn't Work :(
    By infinite_root in forum Linux - Hardware, Networking & Security
    Replies: 1
    Last Post: 09-08-2004, 11:18 PM
  2. X windows doesn't like me
    By Vendetta in forum Linux - General Topics
    Replies: 8
    Last Post: 02-12-2004, 05:50 PM
  3. .htaccess doesn't work.
    By datamike in forum Linux - General Topics
    Replies: 1
    Last Post: 12-23-2002, 05:03 PM
  4. UDP works, TCP doesn't
    By metrik in forum Linux - Hardware, Networking & Security
    Replies: 2
    Last Post: 10-24-2002, 09:59 AM
  5. Xbox Receives Linux Mandrake 9.0
    By cloverm in forum General Chat
    Replies: 0
    Last Post: 10-08-2002, 01:32 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •