cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
460
Views
0
Helpful
3
Replies
kasunrajapakse
Beginner

ASR1000 - Cisco IOS XE - %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed

Hi Guys, 

I have a ASR1000 running Cisco IOS XE Software, Version 16.12.04.
I get the following on my logs. 
But I know the NAT pool has plenty of capacity left. 

--
Feb 4 07:47:53.913 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:036 TS:00001691789441877406 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 07:47:58.941 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:033 TS:00001691794469654984 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 07:48:05.933 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:055 TS:00001691801461317926 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:03:04.502 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:078 TS:00001692700019933256 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:03:09.898 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:023 TS:00001692705416760704 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:03:14.995 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:007 TS:00001692710513092322 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:03:21.939 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:077 TS:00001692717457580306 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:18:17.515 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:098 TS:00001693613023495736 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:18:22.928 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:111 TS:00001693618435755122 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:18:29.028 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:039 TS:00001693624535922760 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:18:35.921 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:083 TS:00001693631429068824 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:33:29.507 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:034 TS:00001694525005423058 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:33:34.508 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:110 TS:00001694530006544240 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:33:41.439 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:099 TS:00001694536936983678 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]
Feb 4 08:33:47.507 GMT: %IOSXE-6-PLATFORM: R0/0: cpp_cp: QFP:0.0 Thread:087 TS:00001694543004627620 %NAT-6-ADDR_ALLOC_FAILURE: Address allocation failed; pool 3 may be exhausted [2]

-------------------

 

ASR1000#show ip nat translations total
Total number of translations: 101507

------------

ASR1000#show ip nat pool name mobile_data_out

NAT Pool Statistics

Pool name mobile_data_out, id 3
Assigned Available
Addresses 4 0
UDP Low Ports 169 1879
TCP Low Ports 0 2048
UDP High Ports 6563 251485
TCP High Ports 93350 164698

(Low ports are less than 1024. High ports are greater than or equal to 1024.)

ASR1000#

------------

ip nat translation timeout 600
ip nat translation tcp-timeout 600
ip nat translation udp-timeout 120
ip nat translation icmp-timeout 120
ip nat translation max-entries 2000000

 

I have the above configured as well. 
Any help will be highly appreciated. 

2 ACCEPTED SOLUTIONS

Accepted Solutions
marce1000
VIP Advisor

Hi Team, 

The issue was that non PATtable traffic was utilizing my NAT pool. Cisco TAC suggested to do the following changes and the issue resolved. 

sh ip nat translations filter entry-type half all                <<<<<< This will show if the NAT pool is being  overutilized by NONPATtable traffic. 

ip nat settings nonpatdrop
clear ip nat translation *

View solution in original post

3 REPLIES 3
MHM Cisco World
Rising star

I think it is Bug

marce1000
VIP Advisor

Hi Team, 

The issue was that non PATtable traffic was utilizing my NAT pool. Cisco TAC suggested to do the following changes and the issue resolved. 

sh ip nat translations filter entry-type half all                <<<<<< This will show if the NAT pool is being  overutilized by NONPATtable traffic. 

ip nat settings nonpatdrop
clear ip nat translation *

View solution in original post

Content for Community-Ad
This widget could not be displayed.