This article explains how the DHCP packets are processed by the IP stack on the IAP.
A new feature has been added to the OS version 18.104.22.168_3.2.0 wherein, we can debug the DHCP packets to understand and diagnose any DHCP related issues in a better way. Using these debugging commands, we can find out how the DHCP packet was processed by the IP stack and whether it is dropped or forwarded. If the DHCP packet did not enter datapath, then no debugging output can be captured using these cli commands.The CLI commands to debug DHCP packets are:
Example: If we want to debug the DHCP packet using client's mac address
First command tells the debug show match the mac addressSecond command tells what mac address to matchThird command tell the packet type to be DHCPFourth command tells the IAP to dump the output.The command outputs can be analyzed by TAC or engineering team to diagnose the issue.
Environment : This article applies to all the IAP running OS version 22.214.171.124_3.2.0
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