Last Modified: Jun 19, 2025
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6
Opened: Feb 27, 2019 Severity: 4-Minor
When STP is in passthru mode (the default setting), the layer-2 forwarding logic for STP BPDU packets occurs entirely within the broadcom switch. As a result, egressing STP BPDU packets will not be seen in a tcpdump capture (even if capturing on the interface). The ingress BPDU packets will be captured as normal.
STP BPDU frames seen arriving at other devices may not appear in an egress capture on the BIG-IP device, despite having been sent by the BIG-IP device.
STP is in passthru mode Platform other than (C117, C115, C112, C113)
Take tcpdump on the device which connect to BIG-IP egress interface to verify whether STP is passthrough.
None