Bug ID 888569: Added PBA stats for total number of free PBAs, and percent free PBAs

Last Modified: Nov 07, 2022

Affected Product(s):
BIG-IP AFM(all modules)

Known Affected Versions:
15.0.0, 15.0.1,,,,, 15.1.0,,

Fixed In:

Opened: Mar 09, 2020

Severity: 3-Major


There are several port block allocation (PBA) statistics that need to be added.


Need to manually calculate the values.


Attempting to retrieve total number of PBAs and percentage of PBAs that are available.


Make manual calculations from the current stats or configuration.

Fix Information

The first and second item described are available using the 'tmsh show' command, and the third item is available in the tmstat tables (e.g., reported in response to the command 'tmctl lsn_pool_pba_stat' as total_port_blocks). -- Total number of port blocks available: The total amount of port blocks available according to the PBA configuration. For example, if you have 3 IP addresses for NAT pool/source translation and blocks of 128 ports, and ports from 1024 to 65535, then this stat indicates that you have a total of 1509 port blocks. This number is the result of (64511 (ports available) / 128 (ports per block)) * 3 (number of IP addresses)). -- Percentage of port available (percentage is available in TMSH only): Using the same example, where there are 1509 total blocks and currently are assigned 600 blocks, then there are 909 blocks free. This stat show that are 60.23% of ports available. (100*free ports / total ports). -- Directly gather the values. There are new SNMP OIDs from which to pull this data directly. Although there is way to get this information from the current stats or configuration by making some calculations, the SNMP OIDs enables pulling these values directly.

Behavior Change

The following new tmstat value is now available, in both 'tmctl fw_lsn_pool_pba_stat' and 'tmctl lsn_pool_pba_stat: total_port_blocks The relevant TMSH show commands have been updated to include these new values: -- Total Port Blocks -- Percent Free Port Blocks

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips