topic Re: rhel5 nic problem in Operating System - Linux

rhel5 nic problem

venugopalanramraj — Thu, 09 Dec 2010 06:37:47 GMT

in rhel 5 my nic card is working for same time and some time its not shown in the modules itself. how to check the nic card is working fine or not. what r the commands are need to check it

Re: rhel5 nic problem

Suman_1978 — Thu, 09 Dec 2010 07:22:34 GMT

Hi,
May be you can try these commands in Linux.

ifconfig $interface -- show the information for $interface (usually something like ifconfig eth0)

ethtool $interface

Thanks

Re: rhel5 nic problem

Tim Nelson — Fri, 10 Dec 2010 20:06:41 GMT

lspci

is the card still there ? if it does not show then it is probably toast and in need of replacing.

Re: rhel5 nic problem

~sesh — Sat, 11 Dec 2010 04:32:27 GMT

There are many ways to check if the NIC card is working or not.

1. On the hardware level, first check if the NIC port has the link light and activity light turning on. If yes, on to step 2.

2. Check the NIC is recognized in RHEL.
# dmesg

3. Check if the NIC interface shows an IP address. To do this:
# ifconfig ethX

If no IP address, consider the NIC configuration for either DHCP or static.

4. Next check if you can ping some other known ip address (in the same network):
# ping -I ethX 192.168.1.1

If you find any issues, check the driver being used for the NIC:
# ethtool -i ethX

If the driver information is displayed, check if the driver is loaded:
# lsmod

Note: you can pipe the output to grep for the driver name returned by ethtool. E.g.
# lsmod | grep

This should give you a fair idea of how the NIC is working, and where the possible issue could be. Good luck!