Last Modified: Nov 29, 2025
Affected Product(s):
BIG_IP_NEXT(CNF) CNF
Fixed In:
1.2.1
Opened: Jan 02, 2024 Severity: 2-Critical
The sock driver experiences tx_errors sending out packets on the veth interface (tmctl -d blade -w 250 tmm/xnet/sock/stats), as shown below: ifname q_id mmap_ring_drops rx_buf_err rx_io_err tx_err ------ ---- --------------- ---------- --------- -------- xeth0 0 0 0 0 70828320
Traffic disrupted while TMM restarts.
The TMM container's veth mtu uses a value less than 1500.
None
To ensure TMM container doesn't see any disruption in control plane and k3s traffic that receives on veth interface, TMM matches the mtu value between TMM container's veth interface (eth0) and TMM's internally created VLAN on top of the veth interface.