Right now i using the version of the kernel is

kernel /vmlinuz -2.6.18-8.el5

my version of linux is

Redhat Enterprise Linux 5

In my office using the NIC card is

Realteck RTL8168c(p)/8111c(p) pci=E
gigabit-ethernet Nic

if i need to upgrade the linux version or
what i want to do for this issue
pls give right soluation for this issue

Possibly download and install the Driver from realtek

when i try to install the r8169 version of NIC, i got an error

make -C src/ clean
make[1]: Entering directory `/usr/r8169-6.010.00/src'
rm -rf *.o *.ko *~ core* .dep* .*.d .*.cmd *.mod.c *.a *.s .*.flags .tmp_versions Module.symvers Modules.symvers rset modules.order Module.markers
make[1]: Leaving directory `/usr/r8169-6.010.00/src'
make -C src/ modules
make[1]: Entering directory `/usr/r8169-6.010.00/src'
make -C /lib/modules/2.6.18-8.el5/build SUBDIRS=/usr/r8169-6.010.00/src modules
make: Entering an unknown directory
make: *** /lib/modules/2.6.18-8.el5/build: No such file or directory. Stop.
make: Leaving an unknown directory
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/usr/r8169-6.010.00/src'
make: *** [modules] Error 2

one more

make -C src/ clean
make[1]: Entering directory `/usr/r8169-6.010.00/src'
rm -rf *.o *.ko *~ core* .dep* .*.d .*.cmd *.mod.c *.a *.s .*.flags .tmp_versions Module.symvers Modules.symvers rset modules.order Module.markers
make[1]: Leaving directory `/usr/r8169-6.010.00/src'
make -C src/ modules
make[1]: Entering directory `/usr/r8169-6.010.00/src'
make -C /lib/modules/2.6.18-8.el5/build SUBDIRS=/usr/r8169-6.010.00/src modules
make: Entering an unknown directory
make: *** /lib/modules/2.6.18-8.el5/build: No such file or directory. Stop.
make: Leaving an unknown directory
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/usr/r8169-6.010.00/src'
make: *** [modules] Error 2

please some one help me to solve this problem

It looks to me like you don't have the kernel source installed.

keshavgopinath,

You need the r8169 kernel module for that NIC.
I think kernel 2.6.18 predates that NIC by a long way, so yes, you need a kernel update.

If you feel lucky, tryits harmless if it fails.

thanks, but i need to install which version of kernel is suite for me and how can i find that version of kernel pls help me

uname -r to check version of kernel

http://www.cyberciti.biz/faq/rhel5-i...l-source-code/