kernel: NETDEV WATCHDOG: eth0: transmit timed out

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Hi,

We bought the "Red Hat Enterprise Linux WS release 3" and installed on P4,1GB RAM , 80GB HDD.

We are using Adcom n/w card on this machine:
================
$ dmesg | grep net
Initializing RT netlink socket
Initializing IPsec netlink socket
eth0: 100/10M Ethernet PCI Adapter at 0xd800, 00:e0:50:00:ae:43, IRQ 11
================

I'M GETTING THESE ERROR LOGGED TO "/var/log/message" when ever i'm trying to access some resource across n/w ...ex: cd /net/<machinename>/home

Feb 5 15:26:55 adam amd[754]: Using NFS version 3, protocol tcp on host bangalore
Feb 5 15:26:55 adam amd[754]: file server bangalore, type nfs, state not responding
Feb 5 15:26:58 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:01 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:01 adam amd[754]: Using NFS version 2, protocol udp on host bangalore
Feb 5 15:27:06 adam kernel: NETDEV WATCHDOG: eth0: transmit timed out
Feb 5 15:27:06 adam kernel: eth0: Transmit timed out, status 00000000, resetting...
Feb 5 15:27:06 adam amd[754]: get_nfs_version: returning (3,tcp) on host bangalore
Feb 5 15:27:09 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:09 adam amd[754]: Using NFS version 3, protocol tcp on host bangalore
Feb 5 15:27:12 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:15 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:15 adam amd[754]: Using NFS version 2, protocol udp on host bangalore
Feb 5 15:27:20 adam kernel: NETDEV WATCHDOG: eth0: transmit timed out
Feb 5 15:27:20 adam kernel: eth0: Transmit timed out, status 00000000, resetting...
Feb 5 15:27:20 adam amd[754]: get_nfs_version: returning (3,tcp) on host bangalore
Feb 5 15:27:23 adam amd[754]: get_nfs_version: failed to contact portmapper on host "bangalore": RPC: Timed out
Feb 5 15:27:23 adam amd[754]: Using NFS version 3, protocol tcp on host bangalore
Feb 5 15:27:25 adam amd[754]: mount of "/net/bangalore" has timed out
Feb 5 15:27:28 adam amd[754]: file server bangalore, type nfs, state not responding
===========
*Note* where 'bangalore' in /net/bangalore is machine name in LAN


How could i solve this ?

Kindly advice...

Thanks
-Dilip


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