On an S6700, the NQA status is Down but no ICMP packet is lost during an extended ping test.
After NQA is enabled on the switch, ICMP packets are sent continuously in an extended ping test. The ping succeeds, but the NQA status is Down. It is found that the customer pings an extranet address.
Packet loss does not occur and the latency is stable during the extended ping test. This indicates that the network connection is normal. It is suspected that the receiving end processes the ICMP packets sent during the NQA test and ping test in different ways.
The switch sends ICMP packets without a payload during the NQA test. The receiving end may be unable to process such ICMP packets without a payload. The switch sends 56-byte ICMP packets during the ping test by default.
The datasize command sets the size of the NQA test packet.
The undo datasize command restores the default size of the NQA test packet.
The default size is 0, indicating that the test packet has no payload.
Set the size of the NQA test packet to 56 bytes. The NQA status becomes success.
Some devices do not process ICMP packets without a payload.
Set the size of the NQA test packet to 56 bytes.
[HUAWEI] nqa test-instance user test
[HUAWEI-nqa-user-test] test-type icmp
[HUAWEI-nqa-user-test] datasize 56
Some devices do not process ICMP packets without a payload. For such devices, you can configure the payload of ICMP packets and check whether the problem is resolved.