Last Modified: Nov 07, 2022
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Known Affected Versions:
11.4.0, 11.4.1, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5
12.0.0, 11.6.0 HF6, 11.5.4, 11.4.1 HF10
Opened: Apr 22, 2015
Related Article: K17164
TCP throughput might be severely impacted for traffic traversing a tagged VLAN and BCM57800/BCM57810 NIC on BIG-IP VEs. The 'rxbadsum' counts increase as received LRO'd traffic is ignored by TMM.
Potential throughput drop during a high volume of data transfer.
1. Traffic traverses a tagged VLAN. 2. This issue might be related to systems using Broadcom BCM57800 or BCM57810 NICs. However in general, the required condition is reception of packets with VLAN header are received in uNIC driver.
You can use either of the following workarounds: 1. Avoid using tagged VLANs. 2. Run the following commands on the ESX hypervisor to disable LRO/GRO system-wide, followed by a reboot. -- esxcli system settings advanced set -o /Net/Vmxnet2HwLRO -i 0. -- esxcli system settings advanced set -o /Net/Vmxnet3HwLRO -i 0. -- esxcli system settings advanced set -o /Net/Vmxnet2SwLRO -i 0. -- esxcli system settings advanced set -o /Net/Vmxnet3SwLRO -i 0. -- esxcli system settings advanced set -o /Net/VmxnetSwLROSL -i 0.
Change in L4 packet header offset, resulting from VLAN header insertion, is being accounted for to verify checksum.