2

I am trying to capture packet coming from a switch (mirror data). but no packet is capturing. showing all packet is dropped by interface.

[root@localhost PacketReceiver]# tcpdump -i enp3s0f0 -vvv -w test.pcap tcpdump: listening on enp3s0f0, link-type EN10MB (Ethernet), capture size 262144 bytes ^C0 packets captured 0 packets received by filter 0 packets dropped by kernel 162856 packets dropped by interface

but from another interface which by which server is using internet, by tcpdump packets are capturing fine.

What is the problem. and what will be the solution.

Improve this question

1 Answer 1

Reset to default
3 
ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096 Current hardware settings: RX: 256 RX Mini: 0 RX Jumbo: 0 TX: 256 [~] # ethtool -G eth0 rx 4096 [~] # [~] # ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096 Current hardware settings: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 256

This solved my issue. :)

Improve this answer
1
  • Can you please explain a bit more your solution and why it works? Commented Aug 11, 2021 at 2:17

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.