Brocade Adapters Troubleshooting Guide 3953-1002145-01Network interface problems (CNA or NIC) 2Poor network performancePoor network performance apparent for Windows and Linux systems.1. Symptom: Checksum offloads are disabled.Action: For Windows, verify if checksum offload parameters are enabled using the Advancedtab on the Network Adapters > Properties dialog box in Device Manager.Action: For Linux, run the ethtool -k command. If offload parameters are on,information similar to the following displays in the output.rx-checksumming: ontx-checksumming: ontcp segmentation offload: onAction: Checksum offloads should be enabled by default. If not, refer to the “AdapterConfiguration” appendix in the Brocade Adapters Installation and Reference Manual.2. Symptom: Dynamic interrupt moderation is disabled.Action: For Windows, verify if interrupt moderation is enabled using the Advanced tab on theNetwork Adapters > Properties dialog box in Device Manager.Action: For Linux, run the ethtool -c command. If interrupt moderation isenabled, information similar to the following displays in the output.Coalesce parameters for eth2:Adaptive RX: on TX: offAction: Interrupt moderation should be enabled by default. If not, refer to the “AdapterConfiguration” appendix in the Brocade Adapters Installation and Reference Manual.3. Symptom: Not all eight lanes of PCIe bus are functioning.Action: For Linux, run the following command:lspci –vv –d 1657:0014If eight lanes are detected, information similar to the following should appear in the commandoutput:Link: Supported Speed unknown, Width x8, ASPM L0s L1, Port 0Link: Speed 2.5Gb/s, Width x8Action: If eight lanes are not detected, try rebooting the system. If this does not fix the problem,contact customer support for your adapter.Binding issues after Hyper-V enabled with teamingFollowing are issues to consider when enabling Hyper-V when teams are created.BNI driver upgraded, installed, or removedBinding issues may result when the Brocade network intermediate (BNI) driver is upgraded,installed, or removed if there is a team created through BCU or HCM and it is enabled with Hyper-V(bound to Microsoft Hyper-V Switch Protocol).
