Everytime I do a show run, wr mem or try to add a NAT statement, I get %NAT: System busy. Try later. I did the following but no luck:
%NAT: System busy. Try later
The %NAT: System busy. Try later error message appears when a show command related to NAT or a show running-config or write memory command is executed. This issue is due to the increase in the size of the NAT table. When the size of the NAT table increases, the router runs out of memory.
Reload the router in order to solve this issue. If the error message appears when HSRP SNAT is configured, configure these commands in order to resolve the issue:
It appears you are running out of memory when using NAT. You could try lowering your nat timeouts and see if problem clears up. I would recommend opening a TAC case and have TAC review your configuration.
Symptoms: When you enter a show command that is related to NAT or you enter the show run command when there is a NAT configuration, the "%NAT: System busy. Try later" error message may be generated. In addition, "%SYS-2-NOBLOCK" messages may be generated and the CPU utilization may be very high in the IP Input process.
Conditions: These symptoms are observed on a Cisco 1750 that runs Cisco IOS Release 12.3(9) and that is configured for NAT with SIP traffic (the router is a gateway for IP phones).
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