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Packet drops on 10G interfaces

anthony malpass
Level 1
Level 1


I have 2 Nexus 7K's directly connected over a 10 G link. When i do a ping across it as below i get the following results:-
packet size of 1500 it will drop a packet every 35.
packet size of 1500 it will drop a packet every 35.
packet size of 1500 it will drop a packet every 35.

I have the DF bit set as well. This is consistent every time and the link is hardly utilised. Any ideas.? I was thinking maybe interface buffers....

4 Replies 4

anthony malpass
Level 1
Level 1

I meant to say

  •  packet size of 1500 it will drop a packet every 35.
  • packet size of 1000 it will drop a packet every 53
  • packet size of 500 it will drop a packet every 70

https://chrisjhart.com/Understanding-Control-Plane-Packet-Loss-due-to-CoPP/

I think it normal the CoPP calculate the Bytes and drop packet after the bytes is exceed. 

Thanks Chris. Very informative document. However i was misinformed about the device. Its not a 7K its a 6807-XL

same principle, there is CoPP protect CPU from high rate packet. 

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