One particular server I have out of a few (same data center / network) is acting up network wise. The server load is minimal, so its not that. The NOC confirmed no network issues either, which makes sense since its one server out of about 4 that have this issue. All have the same exact specs, o/s, Cpanel, etc.

root@server [/etc]# mii-tool
eth0: negotiated 100baseTx-FD, link ok
SIOCGMIIPHY on 'eth1' failed: Resource temporarily unavailable

Tracert/ping from dnsstuff.com to the server IP is normal. A couple other servers I lease (100% identical configuration) work just fine.

Kernel
Linux 2.6.9-78.0.1.ELsmp #1 SMP

Firewall

TCP IN
20,21,25,26,53,80,110,143,443,465,953,993,995,2077,2078,2083,2087,2095,2096,3306

TCP OUT
20,21,25,37,43,53,80,110,113,443,587,873,953,2087,2089,2703,3306

UDP IN
20,21,53,953

UDP OUT
20,21,53,113,123,873,953,6277

ICMP IN = 1


Confirmed, resolvers in resolv.conf are correct.


root@server [~]# traceroute dnsstuff.com
traceroute to dnsstuff.com (75.125.82.162), 30 hops max, 38 byte packets
1 xxxxxx (xxxxxx) 0.757 ms 0.507 ms 0.503 ms
2 ge2-11.coreswa.cf.teamnet.net (xxx.xxx.6.57) 0.325 ms 0.321 ms 0.290 ms
3 ge0-1.border2.cf.teamnet.net (xxx.xxx.1.130) 0.270 ms 0.359 ms 0.312 ms
4 border1.p6-3.teamtech-8.ext1.dal.pnap.net (216.52.189.157) 18.190 ms 18.059 ms 18.896 ms
5 core3.tge5-2-bbnet2.ext1.dal.pnap.net (216.52.191.98) 108.819 ms 18.796 ms 18.916 ms
6 207.88.185.73.ptr.us.xo.net (207.88.185.73) 18.548 ms 18.495 ms 18.464 ms
7 65.106.4.233.ptr.us.xo.net (65.106.4.233) 18.553 ms 18.215 ms 18.349 ms
8 * * *
9 * po-1.r02.dllstx09.us.bb.gin.ntt.net (129.250.2.154) 18.361 ms 19.005 ms
10 xe-4-4.r03.dllstx09.us.ce.gin.ntt.net (157.238.225.6) 18.750 ms 18.473 ms 18.342 ms
11 et1-1.ibr01.hstntx2.theplanet.com (70.87.253.50) 26.666 ms 24.172 ms 23.806 ms
12 po1.car03.hstntx2.theplanet.com (74.55.252.74) 24.387 ms 24.525 ms 24.244 ms
13 * * *
14 * * *
15 * * *
16 * * *
17 * *


root@server [/etc]# netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr |more
36 127.0.0.1
26 198.53.156.181
17
14 200.91.165.130
12 200.91.165.129
10 76.255.78.120
10 204.253.133.10
7 190.68.25.222
7 139.18.199.2


root@server [/etc]# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Link detected: yes


root@server [/etc]# cat modprobe.conf
alias eth0 bnx2
alias eth1 bnx2
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptscsi
alias scsi_hostadapter2 mptfc
alias scsi_hostadapter3 mptspi
alias scsi_hostadapter4 mptsas
alias scsi_hostadapter5 mptscsih
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd


root@server [/etc]# modinfo bnx2
filename: /lib/modules/2.6.9-78.0.1.ELsmp/kernel/drivers/net/bnx2.ko
author: Michael Chan <mchan@broadcom.com>
description: Broadcom NetXtreme II BCM5706/5708 Driver
license: GPL
version: 1.6.9 478DCC31494367381918DC4
parm: disable_msi disable Message Signaled Interrupt (MSI)
vermagic: 2.6.9-78.0.1.ELsmp SMP 686 REGPARM 4KSTACKS gcc-3.4
depends:
alias: pci:v000014E4d0000164Asv0000103Csd00003101bc*sc*i*
alias: pci:v000014E4d0000164Asv0000103Csd00003106bc*sc*i*
alias: pci:v000014E4d0000164Asv*sd*bc*sc*i*
alias: pci:v000014E4d0000164Csv*sd*bc*sc*i*
alias: pci:v000014E4d000016AAsv0000103Csd00003102bc*sc*i*
alias: pci:v000014E4d000016AAsv*sd*bc*sc*i*
alias: pci:v000014E4d000016ACsv*sd*bc*sc*i*
alias: pci:v000014E4d00001639sv*sd*bc*sc*i*
alias: pci:v000014E4d0000163Asv*sd*bc*sc*i*



root@server [/etc]# sysreport
Traceback (most recent call last):
File "/usr/sbin/sysreport", line 31, in ?
import sos.policyredhat
ImportError: No module named sos.policyredhat


Server Specs
Dual Core Dual Xeon 2.8Ghz / 4GB Memory
Centos 4.7 / Cpanel 11
Half C Class on the Server

It sounds like a classic case of hardware failure, maybe your NIC specifically. Also double check your power supply: as a former computer store guy (indie, not Best Buy!) and someone who builds his own and repairs old hardware, I can tell you without doubt a flaky power supply will make all sorts of things appear wrong.

Mike