Bug ID 2034661: BX520 blade eDAG masking issue causes redirections with ipv6-prefix-len not equal to 128.

Last Modified: Oct 19, 2025

Affected Product(s):
F5OS F5OS-C(all modules)

Fixed In:
F5OS-C 1.8.2

Opened: Aug 18, 2025

Severity: 2-Critical

Symptoms

This issue can cause lower overall system performance because of bad disaggregation to service endpoint. Host software recognizes that packets are not at the correct endpoint and redirects the packets to the correct endpoint. The extra packet hop can cause lower overall system performance.

Impact

Variable packet performance and latency impact.

Conditions

ipv6-prefix-len not equal to 128. ATSE v75.3.23.00 or earlier.

Workaround

Update to ATSE v75.3.25.00 or newer bitstream release for BX520 blade.

Fix Information

Logic bug in disaggregation masking found and fixed in ATSE v75.3.25.00 bitstream release for BX520 blade.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips