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Cisco Bug: CSCuq21016 - Local pool address not released -> Duplicate local pool address found

Last Modified

Apr 16, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases


Description (partial)

The IP address assigned to L2TP/IPSEC client is not released.

The ASA tries to assign the IP and fails with the following error messages:

%ASA-4-737033: IPAA: Unable to assign Local Pool provided IP address (x.x.x.x) to Client. This IP address has already been assigned by Local Pool
%ASA-4-737025: IPAA: Duplicate local pool address found, x.x.x.x in quarantine

- the IP is being held - seen on "show ip local pool" -> Held Addresses
- the Time Remaining counter goes to zero,
- the the IP is returned to the pool.
- once again the ASA tries to assign it, fails and put it on the hold list.

- That goes in circles until reboot.
- With time the number of affected IPs grows.

- L2TP over IPSEC clients
- IP local pool(s) assigned using group-policy
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