Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 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, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4
Fixed In:
12.0.0, 11.6.0 HF5, 11.5.3
Opened: Mar 16, 2015 Severity: 3-Major Related Article:
K17105
In VXLAN overlays, unicast frames are flooded (via multicast or unicast replication) when the destination MAC address is known and the remote endpoint is unknown. Upon receiving a flooded unicast frame, the BIG-IP system might forward the frame again to yet another endpoint. Eventually an additional L2 hop might be introduced between the sender and the receiver. This applies to both the multicast and the multipoint (unicast replication) configurations of VXLAN.
The introduction of an additional hop adds unnecessary latency.
This affects deployments with three or more VXLAN endpoints.
None
In this release, the system does no L2 forwarding of encapsulated frames received from one endpoint and destined to another within the same overlay (VXLAN VNI/Tunnel), so no extra hop is added.