[c-nsp] DHCP Snooping on Cat3850

[Lukas Tribus]

Hi,


the IOS thread for DHCP snooping is hogging CPU, either it is swamped by incoming DHCP traffic (although this should be rate-limited, not causing 50% CPU load) or the thread got into a infinite loop because of a bug.

Disabling/Enabling DHCP snooping may close the thread and restart it, maybe bringing it back to live or reload the switch.

Other than that you will probably have to troubleshoot with TAC.


As long as DHCP snooping takes over 50% of the CPU, it means it has a serious problem and cannot handle your actual DHCP traffic.



cheers,
lukas