Operational Defect Database
BugZero found this defect 1080 days ago.
Data sources
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F5 | 1022997
TCP segments with an incorrect checksum are transmitted when the sock driver is used in AWS deployments (e.g., 1NIC)
Last update date:
4/26/2024
Affected products:
BIG-IP
BIG-IP LTM
Affected releases:
14.1.3.1
14.1.4
14.1.4.1
14.1.4.2
14.1.4.3
14.1.4.4
14.1.4.5
14.1.4.6
14.1.5
14.1.5.1
14.1.5.2
14.1.5.3
Fixed releases:
No fixed releases provided.
Description:
Bug ID 1022997: TCP segments with an incorrect checksum are transmitted when the sock driver is used in AWS deployments (e.g., 1NIC) ... Last Modified: Apr 26, 2024 ... Severity: 3-Major ... Symptoms ... Deployments on AWS that use the sock driver (1NIC, for example) transmit packets with bad checksums when TSO/GSO is required. ... This causes significant delays as TMM re-segments the packets with correct checksums for retransmission, and may cause some operations to time out (such as configsyncs of large configurations). ... Impact ... -- Delayed packets. -- Possible timeouts for some operations (configsyncs, for example). ... Workaround ... Modify (or create, if not present) the file /config/tmm_init.tcl on the affected BIG-IP systems, and add the following line to it: ndal force_sw_tcs off 1d0f:ec20 Then restart TMM: bigstart restart tmm Note: Restarting TMM will cause a failover (or an outage if there is no high availability (HA) peer available). ... Fix Information
