This is a level 6 error, so not really a big error and more a information.
You probably have configured a group to nat source ip address.
This message is printed when the CSS was unable to select a source port.
It should normally retry and if it can find one the packet is forwarded.
If you get a lot of these, you may start dropping packets.
With group you somehow limit the possibilities of the CSS. If many clients are nated into a single ip address, the number of port will be limited to 65k and this will limit the number of active connections.
Moquery is the command line cousin of Vizore, it's very helpful and efficient sometimes during the troubleshooting. This article aims to provide moquery cheat sheet to the users for some most common seen scenarios.
Here is the checklist before customers/partners contact Cisco TAC:
Firmware Version of APIC and Switch
Download Switch and APIC techsupport logs
Problem description (Symptoms with details)
Business impact (eg, what kind of services...
moquery usageAPIC moquerySwitchmoquery
This document discuss a common issue observed during the VMM integration & VM workload migration to ACI fabric.
VMware Virtual machines are hosted in Cisco UCS-B seri...