pinging IP or loopback 100% packet loss

OS: SLES 11 SP 3 + online updates
HW: HP ProLiant ML370 G6

I can ping this server IP address from any machine on the network, also logs onto this server via ssh/PuTTY, and from this server I also can connect any other machine, but when I ping the IP address of this server from its own console, then 100% packet loss, also pinging does not return any reply and 100 % packet loss.

lspci -vv, returns

06:00.0 Ethernet controller: NetXen Incorporated NX3031 Multifunction 1/10-Gigabit Server Adapter (rev 42)
	Subsystem: Hewlett-Packard Company NC375i Integrated Quad Port Multifunction Gigabit Server Adapter
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 24
	Region 0: Memory at fae00000 (64-bit, non-prefetchable) [size=2M]
	Region 4: Memory at f8000000 (64-bit, non-prefetchable) [size=32M]
	Capabilities: [40] MSI-X: Enable+ Count=64 Masked-
		Vector table: BAR=0 offset=00090000
		PBA: BAR=0 offset=00090800
	Capabilities: [80] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [a0] MSI: Enable- Count=1/32 Maskable- 64bit+
		Address: 0000000000000000  Data: 0000
	Capabilities: [c0] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 256 bytes
		DevSta:	CorrErr+ UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend-
		LnkCap:	Port #0, Speed 5GT/s, Width x8, ASPM unknown, Latency L0 <64ns, L1 <1us
			ClockPM- Surprise- LLActRep- BwNot-
		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 5GT/s, Width x8, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
		DevCap2: Completion Timeout: Not Supported, TimeoutDis-
		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
		LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
			 Compliance De-emphasis: -6dB
		LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
			 EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
	Capabilities: [100 v1] Advanced Error Reporting
		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
		UESvrt:	DLP- SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP- ECRC- UnsupReq- ACSViol-
		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
		AERCap:	First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
	Capabilities: [140 v1] Device Serial Number 59-69-46-61-6e-48-73-75
	Kernel driver in use: netxen_nic
	Kernel modules: netxen_nic

dmesg contains following unusuall messages:

[ 3543.452260] ACPI Error: SMBus or IPMI write requires Buffer of length 66, found length 32 (20110413/exfield-285)
[ 3543.452269] ACPI Error: Method parse/execution failed [\\_SB_.PMI0._PMM] (Node ffff88040f43d268), AE_AML_BUFFER_LIMIT (20110413/psparse-536)
[ 3543.452286] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20110413/power_meter-348)
[ 3543.605608] netxen_nic 0000:06:00.0: eth0: Invalid size
[ 3543.608364] netxen_nic 0000:06:00.1: eth1: Invalid size
[ 3543.611795] netxen_nic 0000:06:00.2: eth2: Invalid size
[ 3543.614397] netxen_nic 0000:06:00.3: eth3: Invalid size
[ 3553.408267] Bridge firewalling registered
[ 3553.426376] Loading kernel module for a network device with CAP_SYS_MODULE (deprecated).  Use CAP_NET_ADMIN and alias netdev-bridge instead

Firewall and aaparmor are disabled and stopped.

please help.

wireshark provides any clues to what is happening?
also are there any suspicious settings inside /etc/sysctl.conf?

can you post the output of:

iptables -L
iptables -t nat -L
ip r
ip a


issue resolved ;-).

for some odd reason this server does not have ifcfg-lo file, I created it,with the contents below

cat  ifcfg-lo
# Loopback (lo) configuration

restart the network service, and everything become normal, i.e now server can ping its IP address as well as its loopback address too.

Thanks for all your help