Re: Reason for Ierrs in netstat

[Masanobu SAITOH]

Hi.

On 2018/02/22 21:18, Frank Wille wrote:

Hi,

one of our servers has some network issues. Symptoms are: Bad ping (twice
as high as comparable machines on the same net), packet loss and increasing
number of Ierrs in "netstat -i".

Is there any chance I can find out the reason behind those Ierrs?


 Currently, the is no way to figure out the reason without modifying if_wm.c


ifp->if_ierrors += 0ULL + /* ensure quad_t */
+ CSR_READ(sc, WMREG_CRCERRS)   /* CRC Error Count */
+ CSR_READ(sc, WMREG_ALGNERRC)  /* Alignment Error Count */
+ CSR_READ(sc, WMREG_SYMERRC)   /* Symbol Error Count */
+ CSR_READ(sc, WMREG_RXERRC)/* receive error Count - R/clr 
*/
+ CSR_READ(sc, WMREG_SEC)   /* Sequence Error Count */
+ CSR_READ(sc, WMREG_CEXTERR)   /* Carrier Extension Error 
Count */
+ CSR_READ(sc, WMREG_RLEC); /* Receive Length Error Count */


 The cable or switch might be bad.






I rebooted the system a few hours ago, and there are some Ierrs again
already:

tethys# netstat -i
Name  Mtu   Network   Address  Ipkts IerrsOpkts Oerrs Colls
wm0   1500  00:30:48:xx:xx:xx  2385235   714  1996966 0 0
[...]


Some more information (system ist running NetBSD/amd64 6.1.5):

wm0 at pci7 dev 0 function 0: Intel i82573E IAMT (rev. 0x03)
wm0: interrupting at ioapic0 pin 16
wm0: PCI-Express bus
wm0: 256 word (8 address bits) SPI EEPROM
wm0: Ethernet address 00:30:48:xx:xx:xx
makphy0 at wm0 phy 1: Marvell 88E Gigabit PHY, rev. 2


wm0: flags=8843 mtu 1500
 
capabilities=7ff80
 
enabled=3f80
 address: 00:30:48:xx:xx:xx
 media: Ethernet autoselect (100baseTX 
full-duplex,flowcontrol,rxpause,txpause)
 status: active
 inet 212.62.xx.xx netmask 0xfff8 broadcast 212.62.xx.xx
 inet6 fe80::230:48ff::%wm0 prefixlen 64 scopeid 0x1




--
---
SAITOH Masanobu (msai...@execsw.org
 msai...@netbsd.org)

Reason for Ierrs in netstat

[Frank Wille]

Hi,

one of our servers has some network issues. Symptoms are: Bad ping (twice
as high as comparable machines on the same net), packet loss and increasing
number of Ierrs in "netstat -i".

Is there any chance I can find out the reason behind those Ierrs?


I rebooted the system a few hours ago, and there are some Ierrs again
already:

tethys# netstat -i
Name  Mtu   Network   Address  Ipkts IerrsOpkts Oerrs Colls
wm0   1500  00:30:48:xx:xx:xx  2385235   714  1996966 0 0
[...]


Some more information (system ist running NetBSD/amd64 6.1.5):

wm0 at pci7 dev 0 function 0: Intel i82573E IAMT (rev. 0x03)
wm0: interrupting at ioapic0 pin 16
wm0: PCI-Express bus
wm0: 256 word (8 address bits) SPI EEPROM
wm0: Ethernet address 00:30:48:xx:xx:xx
makphy0 at wm0 phy 1: Marvell 88E Gigabit PHY, rev. 2


wm0: flags=8843 mtu 1500

capabilities=7ff80

enabled=3f80
address: 00:30:48:xx:xx:xx
media: Ethernet autoselect (100baseTX 
full-duplex,flowcontrol,rxpause,txpause)
status: active
inet 212.62.xx.xx netmask 0xfff8 broadcast 212.62.xx.xx
inet6 fe80::230:48ff::%wm0 prefixlen 64 scopeid 0x1

-- 
Frank Wille