I would work with your IT. This does not sound like a problem on our side. You can look at “ethtool eth0” but you’ll also need to dump the registers to see what the part thinks the link partner is doing. I’m betting you have a mismatch in what your corporate IT wants for your port and what you have set up.
Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation todd.fujin...@intel.com (503) 712-4565 From: Yilmaz, D. [mailto:d.yil...@rug.nl] Sent: Monday, June 01, 2015 11:56 PM To: Fujinaka, Todd Subject: Re: [E1000-devel] 1 Gb. network speed often drops to 100 Mb. Dear Todd, Thanks a lot for the reply. My server connected to a Cisco switch but it is not under my control and I don't have a configuration right on it. Our central IT claims the switch and the cable link is healthy. I can only change the parameters of my network card. And my interface parameters: Features for eth0: rx-checksumming: on tx-checksumming: on tx-checksum-ipv4: on tx-checksum-unneeded: off tx-checksum-ip-generic: off tx-checksum-ipv6: on tx-checksum-fcoe-crc: off [fixed] tx-checksum-sctp: on [fixed] scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: off [fixed] tcp-segmentation-offload: on tx-tcp-segmentation: on tx-tcp-ecn-segmentation: off tx-tcp6-segmentation: on udp-fragmentation-offload: off [fixed] generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: on rx-vlan-offload: on tx-vlan-offload: on ntuple-filters: off receive-hashing: on highdma: on [fixed] rx-vlan-filter: on [fixed] vlan-challenged: off [fixed] tx-lockless: off [fixed] netns-local: off [fixed] tx-gso-robust: off [fixed] tx-fcoe-segmentation: off [fixed] tx-gre-segmentation: off [fixed] tx-udp_tnl-segmentation: off [fixed] fcoe-mtu: off [fixed] loopback: off [fixed] On Mon, Jun 1, 2015 at 4:46 PM, Fujinaka, Todd <todd.fujin...@intel.com<mailto:todd.fujin...@intel.com>> wrote: What is your link partner? Can you disable EEE on the parner? Did you replace the cable? Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation todd.fujin...@intel.com<mailto:todd.fujin...@intel.com> (503) 712-4565 -----Original Message----- From: Yilmaz, D. [mailto:d.yil...@rug.nl<mailto:d.yil...@rug.nl>] Sent: Monday, June 01, 2015 1:54 AM To: e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net> Subject: [E1000-devel] 1 Gb. network speed often drops to 100 Mb. Dear All, I am using on-board Intel igb network module on my one of the CentOS 6 servers. The network speed often drops to 100 Mb and I could not understand what's wrong with it. Could you please tell me what could be the problem? My kernel release on that server is 2.6.32-504.16.2.el6.x86_64 and the ethernet driver is V 5.2.15. ( I installed kmod-hp-igb-5.2.15-2.rhel6u6.x86_64.rpm ). The details of the hardware : 02:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) Subsystem: Hewlett-Packard Company NC362i Integrated Dual port 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 28 Region 0: Memory at fbce0000 (32-bit, non-prefetchable) [size=128K] Region 1: Memory at fbcc0000 (32-bit, non-prefetchable) [size=128K] Region 2: I/O ports at 4000 [size=32] Region 3: Memory at fbcb0000 (32-bit, non-prefetchable) [size=16K] [virtual] Expansion ROM at ef000000 [disabled] [size=128K] Capabilities: [40] 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=1 PME- Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+ Address: 0000000000000000 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [70] MSI-X: Enable+ Count=10 Masked- Vector table: BAR=3 offset=00000000 PBA: BAR=3 offset=00002000 Capabilities: [a0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset- MaxPayload 256 bytes, MaxReadReq 4096 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x4, ASPM L0s L1, Latency L0 <4us, L1 <64us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported DevCtl2: Completion Timeout: 16ms to 55ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis- 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 78-e7-d1-ff-ff-62-8f-d0 Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 1 ARICtl: MFVC- ACS-, Function Group: 0 Capabilities: [160 v1] Single Root I/O Virtualization (SR-IOV) IOVCap: Migration-, Interrupt Message Number: 000 IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy+ IOVSta: Migration- Initial VFs: 8, Total VFs: 8, Number of VFs: 0, Function Dependency Link: 00 VF offset: 128, stride: 2, Device ID: 10ca Supported Page Size: 00000553, System Page Size: 00000001 Region 0: Memory at 00000000fbc00000 (64-bit, non-prefetchable) Region 3: Memory at 00000000fbc20000 (64-bit, non-prefetchable) VF Migration: offset: 00000000, BIR: 0 Kernel driver in use: igb Kernel modules: igb And this is my module details : modinfo igb filename: /lib/modules/2.6.32-504.16.2.el6.x86_64/weak-updates/hp-igb/igb.ko version: 5.2.15 license: GPL description: Intel(R) Gigabit Ethernet Network Driver author: Intel Corporation, <e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net>> srcversion: ED3CC1731051E90002E99E7 alias: pci:v00008086d000010D6sv*sd*bc*sc*i* alias: pci:v00008086d000010A9sv*sd*bc*sc*i* alias: pci:v00008086d000010A7sv*sd*bc*sc*i* alias: pci:v00008086d000010E8sv*sd*bc*sc*i* alias: pci:v00008086d00001526sv*sd*bc*sc*i* alias: pci:v00008086d0000150Dsv*sd*bc*sc*i* alias: pci:v00008086d000010E7sv*sd*bc*sc*i* alias: pci:v00008086d000010E6sv*sd*bc*sc*i* alias: pci:v00008086d00001518sv*sd*bc*sc*i* alias: pci:v00008086d0000150Asv*sd*bc*sc*i* alias: pci:v00008086d000010C9sv*sd*bc*sc*i* alias: pci:v00008086d00000440sv*sd*bc*sc*i* alias: pci:v00008086d0000043Csv*sd*bc*sc*i* alias: pci:v00008086d0000043Asv*sd*bc*sc*i* alias: pci:v00008086d00000438sv*sd*bc*sc*i* alias: pci:v00008086d00001516sv*sd*bc*sc*i* alias: pci:v00008086d00001511sv*sd*bc*sc*i* alias: pci:v00008086d00001510sv*sd*bc*sc*i* alias: pci:v00008086d00001527sv*sd*bc*sc*i* alias: pci:v00008086d0000150Fsv*sd*bc*sc*i* alias: pci:v00008086d0000150Esv*sd*bc*sc*i* alias: pci:v00008086d00001524sv*sd*bc*sc*i* alias: pci:v00008086d00001523sv*sd*bc*sc*i* alias: pci:v00008086d00001522sv*sd*bc*sc*i* alias: pci:v00008086d00001521sv*sd*bc*sc*i* alias: pci:v00008086d00001539sv*sd*bc*sc*i* alias: pci:v00008086d0000157Csv*sd*bc*sc*i* alias: pci:v00008086d0000157Bsv*sd*bc*sc*i* alias: pci:v00008086d00001538sv*sd*bc*sc*i* alias: pci:v00008086d00001537sv*sd*bc*sc*i* alias: pci:v00008086d00001536sv*sd*bc*sc*i* alias: pci:v00008086d00001533sv*sd*bc*sc*i* alias: pci:v00008086d00001F45sv*sd*bc*sc*i* alias: pci:v00008086d00001F41sv*sd*bc*sc*i* alias: pci:v00008086d00001F40sv*sd*bc*sc*i* depends: i2c-core,ptp,dca,i2c-algo-bit vermagic: 2.6.32-504.el6.x86_64 SMP mod_unload modversions parm: InterruptThrottleRate:Maximum interrupts per second, per vector, (max 100000), default 3=adaptive (array of int) parm: IntMode:Change Interrupt Mode (0=Legacy, 1=MSI, 2=MSI-X), default 2 (array of int) parm: Node:set the starting node to allocate memory on, default -1 (array of int) parm: LLIPort:Low Latency Interrupt TCP Port (0-65535), default 0=off (array of int) parm: LLIPush:Low Latency Interrupt on TCP Push flag (0,1), default 0=off (array of int) parm: LLISize:Low Latency Interrupt on Packet Size (0-1500), default 0=off (array of int) parm: RSS:Number of Receive-Side Scaling Descriptor Queues (0-8), default 1, 0=number of cpus (array of int) parm: VMDQ:Number of Virtual Machine Device Queues: 0-1 = disable, 2-8 enable, default 0 (array of int) parm: max_vfs:Number of Virtual Functions: 0 = disable, 1-7 enable, default 0 (array of int) parm: MDD:Malicious Driver Detection (0/1), default 1 = enabled. Only available when max_vfs is greater than 0 (array of int) parm: QueuePairs:Enable Tx/Rx queue pairs for interrupt handling (0,1), default 1=on (array of int) parm: EEE:Enable/disable on parts that support the feature (array of int) parm: DMAC:Disable or set latency for DMA Coalescing ((0=off, 1000-10000(msec), 250, 500 (usec)) (array of int) parm: LRO:Large Receive Offload (0,1), default 0=off (array of int) parm: debug:Debug level (0=none, ..., 16=all) (int)
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