Bug ID 575027: Tagged VLAN configurations with a cmp-hash setting for the VLAN, might result in performance issues.

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP MA-VE(all modules)

Known Affected Versions:
11.5.4, 11.5.4 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1, 11.6.1 HF1, 11.5.4 HF2

Opened: Feb 19, 2016

Severity: 3-Major

Related Article: K10550303

Symptoms

Tagged VLAN configurations with a cmp-hash setting for the VLAN, might result in performance issues.

Impact

Throughput is lower than expected. Packets are not being hashed using the hash set in config. (This can be verified by looking at 'tmm/flow_redir_stat'.)

Conditions

This occurs when the following conditions are met: 1. Use of tagged VLANs in the configuration. 2. Change cmp-hash of the tagged VLAN.

Workaround

Use untagged VLANs and hypervisor side tagging.

Fix Information

You can now use tagged VLAN configurations along with a cmp-hash setting for the VLAN, without compromising performance.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips