Bug ID 722919: Memory leak when using SP-DAG and a small LSN pool.

Last Modified: Dec 20, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4

Opened: Jun 04, 2018
Severity: 3-Major

Symptoms

High memory usage by objects of type cmp. Using SP-DAG and a small Large Scale NAT (LSN) pool, some TMMs may not have any local translation addresses. If connections are routed out a VLAN that has cmp-hash src-ip, a small amount of memory may be leaked.

Impact

A small amount of memory may be leaked. The aggressive sweeper might kill connections. TMM may crash. Traffic disrupted while tmm restarts.

Conditions

-- Using SP-DAG. -- Using small LSN pools. -- Having TMMs that do not not have any local translation addresses. -- Connections are routed out a VLAN that has cmp-hash src-ip.

Workaround

Using the default DAG with small LSN Pools gives all TMMs local translation endpoints. To prevent the leak, allow only VLANs with cmp-hash dst-ip in the LSN pool egress interface list.

Fix Information

None

Behavior Change