Application Scenarios for Obtaining Packet Headers
Obtaining Packet Headers to Be Sent to CPUs
In the example shown in Figure 1, when a user on Subnet A pings Device A, packet loss occurs, and Device A has high central processing unit (CPU) usage. Network engineers can use the obtaining packet headers feature to obtain all packet headers to be sent to Device A's CPU and analyze these obtained packet headers to locate the fault.
Obtaining Packet Headers to Be Forwarded
On the network shown in Figure 1, when the link between the user on subnet A and the user on subnet B is unstable, network engineers can view traffic statistics on the interfaces of Device A and Device B to determine that the traffic between Device A and Device B is abnormal. Then network engineers can obtain the packet headers to be forwarded on Device C's interfaces connected to Device A and Device B and analyze these packet headers to locate the fault.