Last Modified: Apr 26, 2026
Affected Product(s):
BIG-IP All
Known Affected Versions:
17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5
Opened: Oct 16, 2025 Severity: 3-Major
On a BIG-IP VE deployed in a HyperV or Azure environment, traffic passing fails with tagged VLAN interfaces
BIG-IP is unable to pass any data-plane traffic.
-- BIG-IP VE is deployed in Azure or HyperV environment and has DPDK driver in use for the dataplane interfaces. -- User can check the driver in use by running "tmctl -d blade tmm/xnet/device_probed" table that should show them "dpdk" in the "driver_selected" column for their dataplane interfaces. -- User has tagged VLANs configured.
-- Switch to the default "sock" driver by running: tmsh modify sys db ve.ndal.driver.netvsc value sock -- For BIG-IP versions where the above dbvar is not available, the user can directly modify the /config/tmm_init.tcl file and set "sock" as the default driver for netvsc devices by adding this command: >> cat tmm_init.tcl device driver vendor_dev f5f5:f550 sock
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