Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP APM
Known Affected Versions:
11.5.3, 11.5.3 HF1, 11.5.3 HF2, 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, 12.0.0, 12.0.0 HF1, 12.0.0 HF2
Fixed In:
13.0.0, 12.1.0, 12.0.0 HF3, 11.6.1, 11.5.4 HF2
Opened: Jan 21, 2016 Severity: 3-Major Related Article:
K81130213
When Network Access is already established and a second network interface is being connected to client system, VPN quickly reconnects, which breaks existing TCP connections. Because reconnect occurs very quickly, it might appear to the user that nothing happened.
Long-standing TCP connection may break, for example, VPN over Network Access.
-- 'Allow Local subnet access' enabled. -- Client system is getting second network interface connected.
Disable 'Allow Local subnet access'.
Now Network Access remains stable when a second network interface is being connected, so any long-standing TCP connections (such as VPN over Network Access) continue as expected.