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Forum Discussion

neeeewbie's avatar
neeeewbie
Icon for MVP rankMVP
Sep 26, 2019

No traffic flowing when running tcpdump

Hello!!! I need your help!   When setting interface mirror, I want to check the traffic to the mirror port. When using tcpdump -nei 1.1, no traffic flows to the mirror port. If you turn off tcpd...
application delivery
BIG-IP
operations
Kurt_Erickson's avatar
Kurt_Erickson
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Oct 14, 2019

K65535212: Limitation of using the tcpdump utility on mirrored interfaces

 

neeeewbie's avatar
neeeewbie
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Oct 15, 2019

Thanks!

How do I check a packet without using the tcpdump command?

  • Anjuli_Lam's avatar
    Anjuli_Lam
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    Oct 23, 2019

    You should use an external capture device attached to the network interface to analyze (sniff) traffic that is mirrored to the interface. Hope that helps!