how to check UDP packet loss on switch

Latest reply: Dec 31, 2018 14:53:22 509 12 13 0

【Problem Description】

  • Port 1 and Port 4 of Huawei switch isconnected to CPE1 and CPE2.

  • For the application to work properly, bothCPE1 and CPE2 send out PDUs at every 2 second interval to headend controller,and ever 3 second interval towards the branch.

  • The PDUs are sent out on Port 4790 as UDPpackets.

  • We are facing frequent disconnection inapplication.

  • Can you please diagnose and confirm whetehrthe PDUs are getting forwarded or blocked on the switch.


【Problem Analysis】

As my checking, the switch is just a L2 switch

And there is no mac-address flapping records on this switch.

=======================================================================

  ===============display mac-address flappingrecord===============

=======================================================================

Info: The MAC address flapping record does not exist.

 

And I want to know whether there is ip-address for the UDPpacket? If yes, we can do traffic statistic to check; if not, we need capturepacket to confirm it is forwarded or blocked by switch.


【Root Cause】

this is just customer query
【Solution Description】

tell customer how to test the problem:

whether there is ip-address for the UDPpacket? If yes, we can do traffic statistic to check; if not, we need capturepacket to confirm it is forwarded or blocked by switch.

  • x
  • convention:

littlestone
Created Dec 29, 2018 11:11:59 Helpful(0) Helpful(0)

UDP is the abbreviation of User Datagram Protocol. Its Chinese name is User Datagram Protocol. It is a connectionless transport layer protocol in OSI (Open System Interconnection) reference model, providing transaction-oriented simplicity.
  • x
  • convention:

w1
Created Dec 31, 2018 13:59:38 Helpful(0) Helpful(0)

Thanks for you share about this which is very useful for my daily troubleshooting.
And now i can easy to check the ospf logs if i face any issue about this.before this i aways do not know how to deal with them,and wasted a lot of time to serch this.Thanks agin for you selfless Sharing
  • x
  • convention:

user_2915719
Created Dec 31, 2018 14:05:12 Helpful(0) Helpful(0)

Ok, so we know we have to capture packets to analyze and do statistics.
  • x
  • convention:

w1
Created Dec 31, 2018 14:53:22 Helpful(0) Helpful(0)

I think we can use UDP port to check by traffic statistics function to check if the UDP packets loss or not in the device, this case seems like is not so clear
  • x
  • convention:

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